Found 59 papers in cond-mat Controlling the bandstructure of Dirac materials is of wide interest in
current research but has remained an outstanding challenge for systems such as
monolayer graphene. In contrast, Bernal bilayer graphene (BLG) offers a highly
flexible platform for tuning the bandstructure, featuring two distinct regimes.
In one regime, which is well established and widely used, a tunable bandgap is
induced by a large enough transverse displacement field. Another is a gapless
metallic band occurring near charge neutrality and at not too strong fields,
featuring rich 'fine structure' consisting of four linearly-dispersing Dirac
cones with opposite chiralities in each valley and van Hove singularities. Even
though BLG was extensively studied experimentally in the last two decades, the
evidence of this exotic bandstructure is still elusive, likely due to
insufficient energy resolution. Here, rather than probing the bandstructure by
direct spectroscopy, we use Landau levels as markers of the energy dispersion
and carefully analyze the Landau level spectrum in a regime where the cyclotron
orbits of electrons or holes in momentum space are small enough to resolve the
distinct mini Dirac cones. We identify the presence of four distinct Dirac
cones and map out complex topological transitions induced by electric
displacement field. These findings introduce a valuable addition to the toolkit
for graphene electronics.
We solve models of $N$ species of fermions in the lowest Landau level with
$U(N)$-invariant interactions in the $N\gg 1$ limit. We find saddles of the
second quantized path integral at fixed chemical potential corresponding to
fractional Hall states with filling $ \frac{p}{q}$ where the integers $p$ and
$q$ depend on the chemical potential and interactions. On a long torus there
are $q$ such states related by translation symmetry, and $SU(N)$-invariant
excitations of fractional charge. Remarkably, these saddles and their filling
persist as extrema of the second-quantized action at $N=1$. Our construction
gives a first-principles derivation of fractional Hall states from strongly
interacting fermions.
The topology of the network of load transmitting connections plays an
essential role in the cascading failure dynamics of complex systems driven by
the redistribution of load after local breakdown events. In particular, as the
network structure is gradually tuned from regular to completely random a
transition occurs from the localized to mean field behavior of failure
spreading. Based on finite size scaling in the fiber bundle model of failure
phenomena, here we demonstrate that outside the localized regime, the load
bearing capacity and damage tolerance on the macro-scale, and the statistics of
clusters of failed nodes on the micro-scale obey scaling laws with exponents
which depend on the topology of the load transmission network and on the degree
of disorder of the strength of nodes. Most notably, we show that the spatial
structure of damage governs the emergence of the localized to mean field
transition: as the network gets gradually randomized failed clusters formed on
locally regular patches merge through long range links generating a percolation
like transition which reduces the load concentration on the network. The
results may help to design network structures with an improved robustness
against cascading failure.
We simulated modifications to a model of a two-dimensional paramagnetic
semiconductor called the half-BHZ model, also known as the QWZ model, and
simulated a modified full BHZ model, where a time reversal pair is introduced.
Our modifications to the models include adding single and multiple impurities
connected to the lattices or as a connection between the time-reversal pairs.
We employed the Julia programming language to show how to speed up calculations
for time evolutions. By simulating the time evolutions, we could observe the
differences in the effects of these modifications. Our simulations showed the
presence of scattering behavior associated with the infinite QWZ model
topological states. Moreover, we observed scattering and absorption behavior
related to the parameters and placements of impurities and Hamiltonian
imaginary component's symmetry or anti-symmetry. These tools and early results
lay the foundations for developing electronic devices that use the models'
unique scattering and absorption behaviors and explore more complex and
physically accurate modifications to the models.
Solitons have garnered significant attention across various fields, yet a
contentious debate persists regarding the precise structure of solitons on
indium chains. Currently, multiple forms of solitons in one-dimensional atomic
chains have been reported. STM provides an effective means to study the precise
atomic structure of solitons, particularly their dynamics and interactions.
However, limited research has been conducted on soliton interactions and
soliton-chain interactions, despite their profound impact on relative soliton
motions and the overall physical properties of the system. In this work, we
characterized the structures of the soliton dimer and trimer, observed the
displacements induced by the soliton entity and statisticized the dynamic
behaviors of soliton dimers over time evolution or temperature. To reveal the
soliton mechanism, we further utilized STM to investigate the CDWs between two
solitons when two monomers were encountered. Additionally, we achieved the
manipulation of the monomer on the indium chain by the STM tip. Our work serves
as an important approach to elucidate interactions in correlated electronic
systems and advance the development of potential topological soliton computers.
The rapid development of functional graphene-like nanoribbons with
high-quality has become increasingly reliant on multiple nanofabrication
platforms while traditional methods are facing mounting limitations in this
regard. Consequently, the demand for novel techniques to explore and manipulate
graphene-like nanoribbons has surged. Herein, we report an on-surface synthesis
of graphene-like nanoribbons on pentacene/picene monomers via a series of
self-assembly and annealing on the one-dimensional(1D) Au(110) substrate. Our
scanning tunneling microscope(STM) research reveals that four-/eight- membered
rings are formed between adjacent molecules. Furthermore, we demonstrate the
technique to manipulate the pentacene dimer without breaking its structure by
operating an STM tip. Our results exhibit a possible platform for developing
next generation graphene-based quantum computing designs and a technique to
obtain multiple functional graphene-like nanoribbons with high-precision.
Tuning magnetic properties of magnetic topological materials is of interest
to realize elusive physical phenomena such as quantum anomalous hall effect
(QAHE) at higher temperatures and design topological spintronic devices.
However, current topological materials exhibit Curie temperature (TC) values
far below room temperature. In recent years, significant progress has been made
to control and optimize TC, particularly through defect engineering of these
structures. Most recently we showed evidence of TC values up to 80K for
(MnSb2Te4)x(Sb2Te3)1-x, where x is greater than or equal to 0.7 and less than
or equal to 0.85, by controlling the compositions and Mn content in these
structures. Here we show further enhancement of the TC, as high as 100K, by
maintaining high Mn content and reducing the growth rate from 0.9 nm/min to 0.5
nm/min. Derivative curves reveal the presence of two TC components contributing
to the overall value and propose TC1 and TC2 have distinct origins: excess Mn
in SLs and Mn in Sb2-yMnyTe3QLs alloys, respectively. In pursuit of elucidating
the mechanisms promoting higher Curie temperature values in this system, we
show evidence of structural disorder where Mn is occupying not only Sb sites
but also Te sites, providing evidence of significant excess Mn and a new
crystal structure:(Mn1+ySb2-yTe4)x(Sb2-yMnyTe3)1-x. Our work shows progress in
understanding how to control magnetic defects to enhance desired magnetic
properties and the mechanism promoting these high TC in magnetic topological
materials such as (Mn1+ySb2-yTe4)x(Sb2-yMnyTe3)1-x.
Quasi-one-dimensional (Q1D) Cr-based pnictide K$_2$Cr$_3$As$_3$ has aroused
great research interest due to its possible triplet superconducting pairing
symmetry. Recent experiments have shown that incorporating hydrogen atoms into
K$_2$Cr$_3$As$_3$ would significantly change its electronic and magnetic
properties. Hence, it's necessary to investigate the impact of hydrogen doping
in superconducting pairing symmetry of this material. Employing the hydrogen as
an non-trivial electron-doping, our calculates show that, different from the
$p_z$-wave obtained without hydrogen, the system exhibits $p_x\pm ip_y$ pairing
superconductivity under specific hydrogen doping. Specifically, we adopt the
random-phase-approximation approach based on a six-band tight-binding model
equipped with multi-orbital Hubbard interactions to study the hydrogen-doping
dependence of the pairing symmetry and superconducting $T_c$. Under the
rigid-band approximation, our pairing phase diagram shows the spin-triplet
pairing states is dominated through out the hydrogen-doping regime $x\in
(0,0.7)$. Particularly, the $T_c\sim x$ curve shows a peak at the 3D-quasi-1D
Lifshitz transition point, and the pairing symmetry around this doping level is
$p_x\pm ip_y$. The physical origin of this pairing symmetry is that the density
of states is mainly concentrated at $k_x(k_y)$ with large momentum. Due to the
three-dimensional character of the real material, this $p_x\pm ip_y$-wave
superconducting state possesses point gap nodes. We further provide experiment
prediction to identify this triplet $p_x\pm ip_y$-wave superconductivity.
We report an experimental study of the disordered Su-Schrieffer-Heeger (SSH)
model, implemented in a system of coaxial cables, whose radio frequency
properties map on to the SSH Hamiltonian. By measuring multiple chains with
random hopping terms, we demonstrate the presence of a topologically protected
state, with frequency variation of less than 0.2% over the ensemble. Connecting
the ends of the chains to form loops, we observe a topological phase
transition, characterised by the closure of the band gap and the appearance of
states which are delocalised, despite the strong disorder.
Fracton codes host unconventional topological states of matter and are
promising for fault-tolerant quantum computation due to their large coding
space and strong resilience against decoherence and noise. In this work, we
investigate the ground-state properties and phase transitions of two
prototypical self-dual fracton spin models -- the tetrahedral Ising model and
the fractal Ising model -- which correspond to error-correction procedures for
the representative fracton codes of type-I and type-II, the checkerboard code
and the Haah's code, respectively, in the error-free limit. They are endowed
with exotic symmetry-breaking properties that contrast sharply with the
spontaneous breaking of global symmetries and deconfinement transition of gauge
theories. To show these unconventional behaviors, which are associated with
sub-dimensional symmetries, we construct and analyze the order parameters,
correlators, and symmetry generators for both models. Notably, the tetrahedral
Ising model acquires an extended semi-local ordering moment, while the fractal
Ising model fits into a polynomial ring representation and leads to a fractal
order parameter. Numerical studies combined with analytical tools show that
both models experience a strong first-order phase transition with an anomalous
$L^{-(D-1)}$ scaling, despite the fractal symmetry of the latter. Our work
provides new understanding of sub-dimensional symmetry breaking and makes an
important step for studying quantum-error-correction properties of the
checkerboard and Haah's codes.
Spin-orbital textures in topological insulators due to the spin locking with
the electron momentum, play an important role in spintronic phenomena that
arise from the interplay between charge and spin degrees of freedom. We have
explored interfaces between a ferromagnetic system (CrI$_3$) and a topological
insulator (Bi$_2$Se$_3$) that allow the manipulation of spin-orbital textures.
Within an {\it ab initio} approach we have extracted the spin-orbital-textures
dependence of experimentally achievable interface designs. The presence of the
ferromagnetic system introduces anisotropic transport of the electronic spin
and charge. From a parameterized Hamiltonian model we capture the anisotropic
backscattering behavior, showing its extension to other
ferromagnetic/topological insulator interfaces. We verified that the van der
Waals TI/MI interface is an excellent platform for controlling the spin degree
of freedom arising from topological states, providing a rich family of
unconventional spin texture configurations.
Terahertz technologies are important for a number of emerging applications,
such as for next generation communications. We predict that transition metal
substitutional defects in two-dimensional transition metal dichalcogenides
(TMDs) can serve as quantum defects for terahertz technologies. Central to this
prediction is the finding that the zero field splittings between spin sublevels
in such defects are typically in the sub-terahertz to terahertz range due to
the large spin-orbit coupling in these systems. As a proof of concept, we
consider different transition metal impurities from across the periodic table,
in prototypical TMDs, MoS2 and WSe2. Using first principles calculations, we
demonstrate that selected spin triplet defects can potentially serve as qubits
operating in the terahertz regime. We also propose defects that can potentially
be quantum sources of terahertz radiation. Our research broadens the scope of
advancements in quantum information science and lays a foundation for their
integration with THz technologies.
Vapor-pressure mismatched materials such as transition metal chalcogenides
have emerged as electronic, photonic, and quantum materials with scientific and
technological importance. However, epitaxial growth of vapor-pressure
mismatched materials are challenging due to differences in the reactivity,
sticking coefficient, and surface adatom mobility of the mismatched species
constituting the material, especially sulfur containing compounds. Here, we
report a novel approach to grow chalcogenides - hybrid pulsed laser deposition
- wherein an organosulfur precursor is used as a sulfur source in conjunction
with pulsed laser deposition to regulate the stoichiometry of the deposited
films. Epitaxial or textured thin films of sulfides with variety of structure
and chemistry such as alkaline metal chalcogenides, main group chalcogenides,
transition metal chalcogenides and chalcogenide perovskites are demonstrated,
and structural characterization reveal improvement in thin film crystallinity,
and surface and interface roughness compared to the state-of-the-art. The
growth method can be broadened to other vapor-pressure mismatched chalcogenides
such as selenides and tellurides. Our work opens up opportunities for broader
epitaxial growth of chalcogenides, especially sulfide-based thin film
technological applications.
We explore dynamic structural superlubricity for the case of a relatively
large contact area, where the friction force is proportional to the area
(exceeding $\sim 100\,nm^2$) experimentally, numerically, and theoretically. We
use a setup comprised of two molecular smooth incommensurate surfaces --
graphene-covered tip and substrate. The experiments and MD simulations
demonstrate independence of the friction force on the normal load, for a wide
range of normal loads and relative surface velocities. We propose an atomistic
mechanism of this phenomenon, associated with synchronic out-of-plane surface
fluctuations of thermal origin, and confirm it by numerical experiments. Based
on this mechanism, we develop a theory for this type of superlubricity and show
that friction force increases linearly with increasing temperature and relative
velocity, for velocities, larger than a threshold velocity. The MD results are
in a fair agreement with predictions of the theory.
By designing a multi-channel millimeter Hall measurement configuration, we
realize the carrier-density (locally) controllable measurement on the transport
property in 2H MoS$_{2}$. We observe a linearly increased Hall conductivity and
exponentially decreased resistivity as the increase of dc current. The
intrinsically large band gap does not exhibit too much effect on our
measurement, as far as the magnetic field is above the critical value, which is
$B=6$ T for 2H-MoS$_{2}$. Instead, the edge effect which emerge as a result of
one-dimensional channels. This is different from the Corbino geometry which is
widely applied on semiconductors, where the edges are absent. At room
temperature, we observe that the emergent quantized quantum Hall plateaus are
at the same value for both the two measurements, which implies that the
quantized conductivity does not depends on the non-Hermitian interactions, but
the number of partially filled Landau levels, and this is in consistent with
the previous theoretical works\cite{Siddiki}. At low-temperature limit, the
Hall plateaus are destroyed due to the filtered contribution from the electrons
above fermi energy, and in this case, the two measuremens exhibits stronger
distinction, where we observe stronger fluctuations (of voltage, conductivity,
and resistivity) at the currents between where there are Hall plateaus at
higher temperature.
We report the electronic structures and transport properties of a chiral
crystal NbGe$_2$, which is a candidate for a coupled electron-phonon liquid.
The electrical resistivity and thermoelectric power of NbGe$_2$ exhibit clear
differences compared to those of NbSi2 even though both niobium ditetrelides
are isostructural and isoelectronic. We discuss the intriguing transport
properties of NbGe$_2$ based on a van Hove-type singularity in the density of
states. The analysis of de Haas-van Alphen oscillations measured by the field
modulation and magnetic torque methods reveals the detailed shape of the Fermi
surface of NbGe$_2$ by comparison with the results of energy band structure
calculations using a local density approximation. The electron and hole Fermi
surfaces of NbGe$_2$ split into two because of the anti-symmetric spin-orbit
interaction. The temperature dependence of quantum oscillations indicates that
the effective mass is isotropically enhanced in NbGe$_2$ due to strong
electron-phonon interaction.
We present a comprehensive study of the non-centrosymmetric semimetal
LaRhGe$_3$. Our transport measurements reveal evidence for electron-hole
compensation at low temperatures, resulting in a large magnetoresistance of
3000% at 1.8 K and 14 T. The carrier concentration is on the order of
$10^{21}\rm{/cm}^3$, higher than typical semimetals. We predict theoretically
the existence of $\textit{almost movable}$ Weyl nodal lines that are protected
by the tetragonal space group. We discover superconductivity for the first time
in this compound with a $T_{\text c}$ of 0.39(1) K and $B_{\rm{c}}(0)$ of
2.1(1) mT, with evidence from specific heat and transverse-field muon spin
relaxation ($\mu \rm{SR}$). LaRhGe$_3$ is a weakly-coupled type-I
superconductor, and we find no evidence for time-reversal symmetry breaking in
our zero-field $\mu \rm{SR}$. We study the electrical transport in the normal
state and find an unusual $\sim T^{3}$ dependence at low temperature while
Seebeck coefficient and thermal conductivity measurements reveal a peak in the
same temperature range. We conclude that the transport properties of LaRhGe$_3$
in its normal state are strongly influenced by electron-phonon interactions.
Furthermore, we examine the temperature dependent Raman spectra of LaRhGe$_3$
and find that the lifetime of the lowest energy $A_1$ phonon is dominated by
phonon-electron scattering instead of anharmonic decay.
We use the Lindblad equation approach to investigate topological phases
hosting more than one localized state at each side of a disordered SSH chain
with properly tuned long range hoppings. Inducing a non equilibrium steady
state across the chain, we probe the robustness of each phase and the fate of
the edge modes looking at the distribution of electrons along the chain and the
corresponding standard deviation in presence of different kinds of disorder
either preserving, or not, the symmetries of the Hamiltonian.
Excitation with a massive spin reversal of the individual
skyrmion/antiskyrmion type is theoretically studied in a quantum Hall
ferromagnet, where the zero and first Landau levels are completely occupied
only by electrons with spins aligned strictly in the direction determined by
the magnetic field. The Wigner-Seitz parameter is not necessarily considered to
be small. The microscopic model in use is based on a reduced basic set of
quantum states [the so-called ''single-mode (single-exciton) approximation''],
which allows proper account to be taken for mixing of Landau levels, and
substantiating the equations of the classical $O(3)$ nonlinear $\sigma$ model.
The calculated ''spin stiffness'' determines the exchange gap for creating a
pair of skyrmion and antiskyrmion. This gap is significantly smaller than the
doubled cyclotron energy and the characteristic electron-electron correlation
energy. Besides, the skyrmion--antiskyrmion creation gap is much smaller than
the energy of creation of a separated electron--exchange-hole pair calculated
in the limit case of a spin magnetoexciton corresponding to an infinitely large
2D momentum. At a certain magnetic field (related to the 2D electron density in
the case of fixed filling factor $\nu$), the gap vanishes, which presumably
points to a Stoner transition of the quantum Hall ferromagnet to a paramagnetic
phase.
The integration of optoelectronic devices, such as transistors and
photodetectors (PDs), into wearables and textiles is of great interest for
applications such as healthcare and physiological monitoring. These require
flexible/wearable systems adaptable to body motions, thus materials conformable
to non-planar surfaces, and able to maintain performance under mechanical
distortions. Here, we prepare fibre PDs combining rolled graphene layers and
photoactive perovskites. Conductive fibres ($\sim$500$\Omega$/cm) are made by
rolling single layer graphene (SLG) around silica fibres, followed by
deposition of a dielectric layer (Al$_{2}$O$_{3}$ and parylene C), another
rolled SLG as channel, and perovskite as photoactive component. The resulting
gate-tunable PDs have response time$\sim$5ms, with an external
responsivity$\sim$22kA/W at 488nm for 1V bias. The external responsivity is two
orders of magnitude higher and the response time one order of magnitude faster
than state-of-the-art wearable fibre based PDs. Under bending at 4mm radius, up
to$\sim$80\% photocurrent is maintained. Washability tests show$\sim$72\% of
initial photocurrent after 30 cycles, promising for wearable applications.
Kagome materials have attracted enormous research interest recently owing to
its diverse topological phases and manifestation of electronic correlation due
to its inherent geometric frustration. Here, we report the electronic structure
of a new distorted kagome metal NdTi3Bi4 using a combination of angle resolved
photoemission spectroscopy (ARPES) measurements and density functional theory
(DFT) calculations. We discover the presence of two at bands which are found to
originate from the kagome structure formed by Ti atoms with major contribution
from Ti dxy and Ti dx2-y2 orbitals. We also observed multiple van Hove
singularities (VHSs) in its electronic structure, with one VHS lying near the
Fermi level EF. In addition, the presence of a surface Dirac cone at the G
point and a linear Dirac-like state at the K point with its Dirac node lying
very close to the EF indicates its topological nature. Our findings reveal
NdTi3Bi4 as a potential material to understand the interplay of topology,
magnetism, and electron correlation.
Ultraclean graphene at charge neutrality hosts a quantum critical Dirac fluid
of interacting electrons and holes. Interactions profoundly affect the charge
dynamics of graphene, which is encoded in the properties of its collective
modes: surface plasmon polaritons (SPPs). The group velocity and lifetime of
SPPs have a direct correspondence with the reactive and dissipative parts of
the tera-Hertz (THz) conductivity of the Dirac fluid. We succeeded in tracking
the propagation of SPPs over sub-micron distances at femto-second (fs) time
scales. Our experiments uncovered prominent departures from the predictions of
the conventional Fermi-liquid theory. The deviations are particularly strong
when the densities of electrons and holes are approximately equal. Our imaging
methodology can be used to probe the electromagnetics of quantum materials
other than graphene in order to provide fs-scale diagnostics under
near-equilibrium conditions.
EuCd2As2 was theoretically predicted to be a minimal model of Weyl semimetals
with a single pair of Weyl points in the ferromagnet state. However, the
heavily p-doped EuCd2As2 crystals in previous experiments prevent direct
identification of the semimetal hypothesis. Here we present a comprehensive
magneto-transport study of high-quality EuCd2As2 crystals with ultralow bulk
carrier density (10^13 cm-3). In contrast to the general expectation of a Weyl
semimetal phase, EuCd2As2 shows insulating behavior in both antiferromagnetic
and ferromagnetic states as well as surface-dominated conduction from band
bending. Moreover, the application of a dc bias current can dramatically
modulate the resistance by over one order of magnitude, and induce a periodic
resistance oscillation due to the geometric resonance. Such nonlinear transport
results from the highly nonequilibrium state induced by electrical field near
the band edge. Our results suggest an insulating phase in EuCd2As2 and put a
strong constraint on the underlying mechanism of anomalous transport properties
in this system.
The interplay of electron correlations and topological phases gives rise to
various exotic phenomena including fractionalization, excitonic instability,
and axionic excitation. Recently-discovered transition-metal pentatellurides
can reach the ultra-quantum limit in low magnetic fields and serve as good
candidates for achieving such a combination. Here, we report evidences of
density wave and metal-insulator transition in HfTe5 induced by intense
magnetic fields. Using the nonlinear transport technique, we detect a distinct
nonlinear conduction behavior in the longitudinal resistivity within the a-c
plane, corresponding to the formation of a density wave induced by magnetic
fields. In high fields, the onset of the nonlinear conduction in the Hall
resistivity indicates an impurity-pinned magnetic freeze-out as the possible
origin of the insulating behavior. These frozen electrons can be gradually
re-activated into mobile states above a threshold electric field. These
experimental evidences call for further investigations into the underlying
mechanism for the bulk quantum Hall effect and field-induced phase transtions
in pentatellurides.
The thermal Hall effect in magnetic insulators has been considered a powerful
method for examining the topological nature of charge-neutral quasiparticles
such as magnons. Yet, unlike the kagome system, the triangular lattice has
received less attention for studying the thermal Hall effect because the scalar
spin chirality cancels out between adjacent triangles. However, such
cancellation cannot be perfect if the triangular lattice is distorted, which
could open the possibility of a non-zero thermal Hall effect. Here, we report
that the trimerized triangular lattice of multiferroic hexagonal manganite
YMnO$_3$ produces a highly unusual thermal Hall effect due to topological spin
fluctuations with the additional intricacy of a Dzyaloshinskii-Moriya
interaction under an applied magnetic field. We conclude the thermal Hall
conductivity arises from the system's topological nature of spin fluctuations.
Our theoretical calculations demonstrate that the thermal Hall conductivity is
also related in this material to the splitting of the otherwise degenerate two
chiralities, left and right, of its 120$^{\circ}$ magnetic structure. Our
result is one of the most unusual cases of topological physics due to this
broken $Z_2$ symmetry of the chirality in the supposedly paramagnetic state of
YMnO$_3$, with strong topological spin fluctuations. These new mechanisms in
this important class of materials are crucial in exploring new thermal Hall
physics and exotic excitations.
We investigate interference between topological interfacial modes in a
semiconductor photonic crystal platform with Dirac frequency dispersions, which
can be exploited for interferometry switch. It is showcased that, in a
two-in/two-out structure with four topological waveguides, geometric phases of
the two-component spinor wavefunctions of topological photonic modes accumulate
at turning points of waveguides, which govern the interferences and split the
electromagnetic energy into two output ports with relative power ratio tunable
by the relative phase of inputs. We unveil that this brand-new photonic
phenomenon is intimately related to the spin-momentum locking property of
quantum spin Hall effect, and results from the symphonic contributions of three
phase variables: the spinor phase and geometric phase upon design, and the
global phase controlled from outside. The present findings open the door for
manipulating topological interfacial modes, thus exposing a new facet of
topological physics. The topology-driven interference can be incorporated into
other devices which is expected to leave far-reaching impacts to advanced
photonics, optomechanics and phononics applications.
Understanding the relationship between quantum geometry and topological
invariants is a central problem in the study of topological states. In this
work, we establish the relationship between the quantum metric and the Euler
curvature in two-dimensional systems with space-time inversion $I_{ST}$
symmetry satisfying $I^2_{ST}=+1$. As $I_{ST}$ symmetry imposes the reality of
the wave function with vanishing Berry curvature, the well-known inequality
between the quantum metric and the Berry curvature is not meaningful in this
class of systems. We find that the non-abelian quantum geometric tensor of two
real bands exhibits an intriguing inequality between the off-diagonal Berry
curvature and the quantum metric, which in turn gives the inequality between
the quantum volume and the Euler invariant. Moreover, we show that the
saturation condition of the inequality is deeply related to the ideal condition
for Euler bands, which provides a criterion for the stability of fractional
topological phases in interacting Euler bands. Our findings demonstrate the
potential of the quantum geometry as a powerful tool for characterizing
symmetry-protected topological states and their interaction effect.
Topological invariants, including the Chern numbers, can topologically
classify parameterized Hamiltonians. We find that topological invariants can be
properly defined and calculated even if the parameter space is discrete, which
is done by geodesic interpolation in the classifying space. We specifically
present the interpolation protocol for the Chern numbers, which can be directly
generalized to other topological invariants. The protocol generates a highly
efficient algorithm for numerical calculation of the second and higher Chern
numbers, by which arbitrary precision can be achieved given the values of the
parameterized Hamiltonians on a coarse grid with a fixed resolution in the
parameter space. Our findings also open up opportunities to study topology in
finite-size systems where the parameter space can be naturally discrete.
Antiferromagnetic (AF) topological materials offer a fertile ground to
explore a variety of quantum phenomena such as axion magnetoelectric dynamics
and chiral Majorana fermions. To realize such intriguing states, it is
essential to establish a direct link between electronic states and topology in
the AF phase, whereas this has been challenging because of the lack of a
suitable materials platform. Here we report the experimental realization of the
AF topological-insulator phase in NdBi. By using micro-focused angle-resolved
photoemission spectroscopy, we discovered contrasting surface electronic states
for two types of AF domains; the surface having the out-of-plane component in
the AF-ordering vector displays Dirac-cone states with a gigantic energy gap,
whereas the surface parallel to the AF-ordering vector hosts gapless Dirac
states despite the time-reversal-symmetry breaking. The present results
establish an essential role of combined symmetry to protect massless Dirac
fermions under the presence of AF order and widen opportunities to realize
exotic phenomena utilizing AF topological materials.
We consider a nonequilibrium transition that leads to the formation of
nonlinear steady-state structures due to the gas flow scattering on a partially
penetrable obstacle. The resulting nonequilibrium steady state (NESS)
corresponds to a two-domain gas structure attained at certain critical
parameters. We use a simple mean-field model of the driven lattice gas with
ring topology to demonstrate that this transition is accompanied by the
emergence of local invariants related to a complex composed of the obstacle and
its nearest gas surrounding, which we refer to as obstacle edges. These
invariants are independent of the main system parameters and behave as local
first integrals, at least qualitatively. As a result, the complex becomes
insensitive to the noise of external driving field within the overcritical
domain. The emerged invariants describe the conservation of the number of
particles inside the obstacle and strong temporal synchronization or
correlation of gas states at obstacle edges. Such synchronization guarantees
the equality to zero of the total edge current at any time. The robustness
against external drive fluctuations is shown to be accompanied by strong
spatial localization of induced gas fluctuations near the domain wall
separating the depleted and dense gas phases. Such a behavior can be associated
with nonequilibrium protection effect and synchronization of edges. The
transition rates between different NESSs are shown to be different. The
relaxation rates from one NESS to another take complex and real values in the
sub- and overcritical regimes, respectively. The mechanism of these transitions
is governed by the generation of shock waves at the back side of the obstacle.
In the subcritical regime, these solitary waves are generated sequentially many
times, while only a single excitation is sufficient to rearrange the system
state in the overcritical regime.
We study the coupling of two topologcal subsystems in distinct topological
states, and show that it leads to a precursor behavior of the topological phase
transition in the overall system. This behavior is solely determined by the
symmetry classes of the subsystem Hamiltonians and coupling terms, and is
marked by the persistent existence of subgap states within the bulk energy gap.
By investigating the critical current of Josephson junctions involving
topological superconductors, we also illustrate that such subgap states play
crucial roles in physical properties of nanoscale devices or materials.
We investigate emergent topological gapless phases in the square-lattice
Kitaev model with additional hopping terms. In the presence of nearest-neighbor
hopping only, the model is known to exhibit gapless phases with two topological
gapless points. When the strength of the newly added next-nearest-neighbor
hopping is smaller than a certain value, qualitatively the same phase diagram
persists. We find that further increase of the extra hopping results in a new
topological phase with four gapless points. We construct a phase diagram to
clarify the regions of emergent topological gapless phases as well as
topologically trivial ones in the space of the chemical potential and the
next-nearest-neighbor hopping strength. We examine the evolution of the gapless
phases in the energy dispersions of the bulk as the chemical potential varies.
The topological properties of the gapless phases are characterized by the
winding numbers of the present gapless points. We also consider the ribbon
geometry to examine the corresponding topological edge states. It is revealed
that Majorana-fermion edge modes exist as flat bands in topological gapless
phases. We also perform the analytical calculation as to Majorana-fermion
zero-energy modes and discuss its implications on the numerical results.
Zinc monochalcogenides, including ZnO, ZnS and ZnSe, are crucial for various
applications in optoelectronics and catalysis due to their exceptional
optoelectronic properties. However, accurately predicting their electronic
structures, especially the band gap and energy levels of Zn 3d states, remains
a challenge. Traditional density functional theory (DFT) approaches, including
local density and gradient-corrected approximations (LDA or GGA), often
significantly underestimate these properties compared to experimental values.
Advanced methods such as the GW approximation and DFT+U have been used to
resolve these discrepancies, but they involve high computational costs or
require seemingly unphysical parameters. This study focuses on a modified
Perdew-Burke-Ernzerhof (PBE) exchange-correlation functional with the aim of
more efficient prediction of the band gaps in zinc monochalcogenides. Unlike
previous approaches that require large negative U values for O p orbitals, our
method provides a more transparent solution by directly changing the PBE
functional. We demonstrate improved predictions of the electronic and optical
properties of zinc monochalcogenides that closely align with experimental data,
addressing a significant challenge in the computational study of these
materials.
We show that interlayer charge transfer in 2D materials can be driven by an
in-plane electric field, giving rise to electrical multipole generation in
linear and second order of in-plane field. The linear and nonlinear effects
have quantum geometric origins in the Berry curvature and quantum metric
respectively, defined in extended parameter spaces characteristic of layered
materials. We elucidate their symmetry characters, and demonstrate sizable
dipole and quadrupole polarizations respectively in twisted bilayers and
trilayers of transition metal dichalcogenides. Furthermore, we show that the
effect is strongly enhanced during the topological phase transition tuned by
interlayer translation. The effects point to a new electric control on layer
quantum degree of freedom.
We investigate a generalized multi-orbital tight-binding model on a
triangular lattice, a system prevalent in a wide range of two-dimensional
materials, and particularly relevant for simulating transition metal
dichalcogenide monolayers. We show that the interplay between spin-orbit
coupling and different symmetry-breaking mechanisms leads to the emergence of
four distinct topological phases [Eck, P., \textit{et al.}, Phys. Rev. B, 107
(11), 115130 (2023)]. Remarkably, this interplay also triggers the orbital Hall
effect with distinguished characteristics. Furthermore, by employing the
Landauer-B\"uttiker formula, we establish that in the orbital Hall insulating
phase, the orbital angular momentum is carried by edge states present in
nanoribbons with specific terminations. We also show that, as expected, they do
not have topological protection against the disorder of the edge states
belonging to a first-order topological insulator.
We study a superlattice formed by tunnel-coupled identical antidots
periodically situated in a two-dimensional topological insulator placed in a
magnetic field. The superlattice spectrum can be controlled by gate electrodes
or by changing the magnetic flux through the antidots. We demonstrate that a
topologically protected qubit appears at the boundary between two regions with
different fluxes. The qubit properties depend on the value of the flux jump on
the boundary and can be controlled by the gate voltage. We derive the effective
Hamiltonian of such a qubit and analyze the dependence of its properties on the
main parameters of the superlattice: the tunnel coupling between antidots, and
the probability of jumps with the spin flip.
We experimentally investigate magnetization reversal curves for a GeTe
topological semimetal. In addition to the known lattice diamagnetic response,
we observe narrow magnetization loop in low fields, which should not be
expected for non-magnetic GeTe. The hysteresis is unusual, so the saturation
level is negative in positive fields, and the loop is passed clockwise, in
contrast to standard ferromagnetic behavior. The experimental hysteresis curves
can not be obtained from usual ferromagnetic ones by adding/subtracting of any
linear dependence, or even by considering several interacting magnetic phases.
The possibility of several phases is also eliminated by the remanence plots
technique (Henkel or {\delta}M plots). We explain our results as a direct
consequence of the correlation between ferroelectricity and spin-polarized
surface states in GeTe, similarly to magnetoelectric structures.
Cryogenic scanning tunneling microscopy was employed in combination with
density-functional theory calculations to explore quantum dots made of In
adatoms on the InAs(110) surface. Each adatom adsorbs at a surface site
coordinated by one cation and two anions, and transfers one electron to the
substrate, creating an attractive quantum well for electrons in surface states.
We used the scanning-probe tip to assemble the positively charged adatoms into
precisely defined quantum dots exhibiting a bound state roughly 0.1 eV below
the Fermi level at an intrinsic linewidth of only ~4 meV, as revealed by
scanning tunneling spectroscopy. For quantum-dot dimers, we observed the
emergence of a bonding and an antibonding state with even and odd wave-function
character, respectively, demonstrating the capability to engineer
quasi-molecular electronic states. InAs(110) constitutes a promising platform
in this respect because highly perfect surfaces can be readily prepared by
cleavage and charged adatoms can be generated in-situ by the scanning-probe
tip.
We investigate the optical response induced by a d.c. current flowing in a
nonmagnetic material that lacks inversion symmetry. In this class of materials,
the flowing current experiences a nonlinear Hall effect and induces a
nonequilibrium orbital magnetization, even in the absence of spin-orbit
coupling. As a result, an orbital-driven Kerr effect arises that can be used to
probe not only the orbital magnetization, but also the nonlinear Hall effect.
In addition, in the long wavelength limit, the nonlinear Hall effect leads to a
rectification current that can be used to detect terahertz radiation. We apply
the theory to selected model systems, such as WTe$_2$ bilayer, as well as to
realistic materials, i.e., bulk Te and metallic superlattices. The
nonequilibrium orbital Kerr efficiencies obtained in these systems are
comparable to the largest values reported experimentally in GaAs and MoS$_2$,
exceeding the values reported in metals and suggesting a large terahertz
current responsivity.
Topological textures in magnetic and electric materials are considered to be
promising candidates for next-generation information technology and
unconventional computing. Here, we discuss how the physical properties of
topological nanoscale systems, such as skyrmions and domain walls, can be
leveraged for reservoir computing, translating non-linear problems into
linearly solvable ones. In addition to the necessary requirements of physical
reservoirs, the topological textures give new opportunities for the downscaling
of devices, enhanced complexity, and versatile input and readout options. Our
perspective article presents topological magnetic and electric defects as an
intriguing platform for non-linear signal conversion, giving a new dimension to
reservoir computing and in-materio computing in general.
Bulk-boundary correspondence is a foundational principle underlying the
electronic band structure and physical behavior of topological quantum
materials. Although it has been rigorously tested in topological systems where
the physical properties involve charge currents, it remains unclear whether
bulk-boundary correspondence should also hold for non-conserved spin currents.
We study charge-to-spin conversion in a canonical topological insulator,
Bi$_{1-x}$Sb$_x$, to address this fundamentally unresolved question. We use
spin-torque ferromagnetic resonance measurements to accurately probe the
charge-to-spin conversion efficiency in epitaxial Bi$_{1-x}$Sb$_x$~thin films
of high structural quality spanning the entire range of composition, including
both trivial and topological band structures, as verified using {\it in vacuo}
angle-resolved photoemission spectroscopy. From these measurements, we deduce
the effective spin Hall conductivity (SHC) and find excellent agreement with
the values predicted by tight-binding calculations for the intrinsic SHC of the
bulk bands. These results provide strong evidence that the strong spin-orbit
entanglement of bulk states well below the Fermi energy connects directly to
the SHC in epitaxial Bi$_{1-x}$Sb$_x$~films interfaced with a metallic
ferromagnet. The excellent agreement between theory and experiment points to
the generic value of analyses focused entirely on bulk properties, even for
topological systems involving non-conserved spin currents.
Two-dimensional materials (2DM) and their derived heterostructures have
electrical and optical properties that are widely tunable via several
approaches, most notably electrostatic gating and interfacial engineering such
as twisting. While electrostatic gating is simple and has been ubiquitously
employed on 2DM, being able to tailor the interfacial properties in a similar
real-time manner represents the next leap in our ability to modulate the
underlying physics and build exotic devices with 2DM. However, all existing
approaches rely on external machinery such as scanning microscopes, which often
limit their scope of applications, and there is currently no means of tuning a
2D interface that has the same accessibility and scalability as electrostatic
gating. Here, we demonstrate the first on-chip platform designed for 2D
materials with in situ tunable interfacial properties, utilizing a
microelectromechanical system (MEMS). Each compact, cost-effective, and
versatile device is a standalone micromachine that allows voltage-controlled
approaching, twisting, and pressurizing of 2DM with high accuracy. As a
demonstration, we engineer synthetic topological singularities, known as
merons, in the nonlinear optical susceptibility of twisted hexagonal boron
nitride (h-BN), via simultaneous control of twist angle and interlayer
separation. The chirality of the resulting moire pattern further induces a
strong circular dichroism in the second-harmonic generation. A potential
application of this topological nonlinear susceptibility is to create
integrated classical and quantum light sources that have widely and real-time
tunable polarization. Our invention pushes the boundary of available
technologies for manipulating low-dimensional quantum materials, which in turn
opens up the gateway for designing future hybrid 2D-3D devices for
condensed-matter physics, quantum optics, and beyond.
The intersection of electronic topology and strong correlations offers a rich
platform to discover exotic quantum phases of matter and unusual materials. An
overarching challenge that impedes the discovery is how to diagnose strongly
correlated electronic topology. Here, we develop a framework to address this
outstanding question, and illustrate its power in the setting of electronic
topology in Mott insulators. Based on single-particle Green's functions, the
concept of a Green's function Berry curvature -- which is frequency dependent
-- is introduced. We apply this notion in a system that contains
symmetry-protected nodes in its noninteracting bandstructure; strong
correlations drive the system into a Mott insulating state, creating contours
in frequency-momentum space where the Green's function vanishes. The Green's
function Berry flux of such zeros is found to be quantized, and is as such
direct probe of the system's topology. Our framework allows for a systematic
search of strongly correlated topological materials with Green's function
topology.
We report results of large-scale quantum Monte Carlo (QMC) simulations of
graphene. Using cutting-edge algorithmic improvements, we are able to consider
spatial volumes, corresponding to 20808 electrons, that allow us to access
energy scales of direct relevance to experiments. Using constrained random
phase approximation (cRPA) estimates of short-ranged interactions combined with
a Coulomb tail, we are able to successfully confront numerical and experimental
estimates of the Fermi velocity renormalization. These results and their
comparison with perturbation theory not only show the non-Fermi liquid
character of graphene, but also prove the importance of lattice-scale physics
and higher-order perturbative corrections beyond RPA for the quantitative
description of the experimental data for the Fermi velocity renormalization in
suspended graphene.
Single crystals of ${\rm Ce_2Re_3Si_5}$ and ${\rm Pr_2Re_3Si_5}$ have been
grown by Czochralski method in a tetra-arc furnace. Powder x-ray diffraction
confirmed that these compounds crystallize in the ${\rm U_2Mn_3Si_5}$-type
tetragonal crystal structure with space group $P4/mnc$ (No. 128). The
anisotropic physical properties have been studied comprehensively by measuring
the magnetic susceptibility, isothermal magnetization, electrical transport and
specific heat. The low value of magnetic susceptibility together with no
magnetic transition down to $2$~K gives evidence that the Ce-ions are in the
intermediate valence state in ${\rm Ce_2Re_3Si_5}$. On the other hand ${\rm
Pr_2Re_3Si_5}$ revealed a magnetic ordering at $9$~K. The sharp drop in the
magnetic susceptibility and a spin flip like metamagnetic transition, for
$H~\parallel~[001]$ in the magnetization plot of ${\rm Pr_2Re_3Si_5}$ suggest
an Ising-type antiferromagnetic ordering. Based on magnetic susceptibility and
isothermal magnetization data, a detailed crystal electric field (CEF) analysis
shows that degenerate ${J} = 4$ Hund's rule derived ground state of ${\rm
Pr^{3+}}$ ion splits into nine singlets with an overall splitting of $1179$~K.
The magnetic ordering in ${\rm Pr_2Re_3Si_5}$ is due to the exchange-generated
admixture of the lowest lying CEF energy levels. Heat capacity data reveal a
sharp peak at $9$~K, that confirms the bulk nature of the magnetic ordering in
${\rm Pr_2Re_3Si_5}$.
The search for new phases is an important direction in materials science. The
phase transition of sulfides results in significant changes in catalytic
performance, such as MoS$_2$ and WS$_2$. Cubic pentlandite [cPn, (Fe, Ni,
Co)$_9$S$_8$] can be a functional material in batteries, solar cells, and
catalytic fields. However, no report about the material properties of other
phases of pentlandite exists. The newly-discovered hexagonal pentlandite in
this research can be a new mineral material for the energy industry and
different catalytic field.
Using the Landau-Ginzburg-Devonshire approach, we study light-induced phase
transitions, evolution of polar state and domain morphology in
photo-ferroelectric nanoparticles (NPs). Light exposure increases the free
carrier density near the NP surface and may in turn induce phase transitions
from the nonpolar paraelectric to the polar ferroelectric phase. Using the
uniaxial photo-ferroelectric Sn2P2S6 as an example, we show that visible light
exposure induces the appearance and vanishing of striped, labyrinthine or
curled domains and changes in the polarization switching hysteresis loop shape
from paraelectric curves to double, pinched and single loops, as well as the
shifting in the position of the tricritical point. Furthermore, we demonstrate
that an ensemble of non-interacting photo-ferroelectric NPs may exhibit
superparaelectric-like features at the tricritical point, such as strongly
frequency-dependent giant piezoelectric and dielectric responses, which can
potentially be exploited for piezoelectric applications.
Introducing magnetism to the surface state of topological insulators, such as
Bi2Te3, can lead to a variety of interesting phenomena. We use scanning
tunneling microscopy (STM) to study a single quintuple layer (QL) of the van
der Waals magnet Fe3GeTe2 (FGT) that is grown on Bi2Te3 via molecular beam
epitaxy. STM topographic images show that the FGT grows as free-standing
islands on Bi2Te3 and outwards from Bi2Te3 steps. Atomic resolution imaging
shows atomic lattices of 390 +- 10 pm for FGT and 430 +- 10 pm for Bi2Te3,
consistent with the respective bulk crystals. A moir\'e pattern is observed on
FGT regions with a periodicity of 4.3 +- 0.4 nm that can be attributed solely
to this lattice mismatch and thus indicates zero rotational misalignments.
While most of the surface is covered by a single QL of the FGT, there are small
double QL regions, as well as regions with distinct chemical terminations due
to an incomplete QL. The most common partial QL surface termination is the FeGe
layer, in which the top two atomic layers are missing. This termination has a
distinctive electronic structure and a (sqrt3 x sqrt3)R30 reconstruction
overlaid on the moir\'e pattern in STM images. Magnetic circular dichroism
(MCD) measurements confirm these thin FGT films are ferromagnetic with TC ~190
K.
A multitask deep neural network model was trained on more than 218k different
glass compositions. This model, called GlassNet, can predict 85 different
properties (such as optical, electrical, dielectric, mechanical, and thermal
properties, as well as density, viscosity/relaxation, crystallization, surface
tension, and liquidus temperature) of glasses and glass-forming liquids of
different chemistries (such as oxides, chalcogenides, halides, and others). The
model and the data used to train it are available in the GlassPy Python module
as free and open source software for the community to use and build upon. As a
proof of concept, GlassNet was used with the MYEGA viscosity equation to
predict the temperature dependence of viscosity and outperformed another
general purpose viscosity model available in the literature (ViscNet) on unseen
data. An explainable AI algorithm (SHAP) was used to extract knowledge
correlating the input (physicochemical information) and output (glass
properties) of the model, providing valuable insights for glass manufacturing
and design. It is hoped that GlassNet, with its free and open source nature,
can be used to enable faster and better computer-aided design of new
technological glasses.
We consider a superlattice formed by tunnel-connected identical holes,
periodically placed in a two-dimensional topological insulator. We study
tunneling transport through helical edges of these holes and demonstrate that
the band structure of such helical crystal can be controlled by both gate
electrodes and external magnetic filed. For integer and half-integer values of
dimensionless magnetic flux through the holes, the spectrum possesses Dirac
points whose positions and velocities can be tuned by gates. The deviation of
magnetic flux from these special values by $\delta \phi$ makes the Dirac cones
massive, with the gap value $\Delta \propto |\delta \phi|$. At certain
gate-dependent values of $\delta \phi$ different Dirac points converge to a
double Dirac point and then disappear with further increase of $\delta \phi.$
Interaction between carriers may lead to strong renormalization of parameters
$\alpha$ and $\beta$ controlling total tunnel coupling between holes and spin
flip tunneling processes, respectively. We plot the renormalization flow in the
plane $(\alpha,\beta)$ and demonstrate multicritical behavior of the crystal --
there is a multicritical fully unstable fixed point separating three different
phases: independent rings, independent shoulders, and perfect spin-flip
channels. We also find that defects in the crystal may lead to a formation of
topologically protected qubits which are not destroyed by temperature and can
be also manipulated both by gates and by magnetic field. The possibility of
purely electrical high-temperature control of the qubits opens a wide avenue
for applications in the area of quantum computing.
In this paper, we study the ground state Quantum Fisher Information (QFI) in
one-dimensional spin-1 models, as witness to Multipartite Entanglement. The
models addressed are the Bilinear-Biquadratic model, the most general isotropic
SU(2)-invariant spin-1 chain, and the XXZ spin-1 chain, both with
nearest-neighbor interactions and open boundary conditions. We show that the
scaling of the QFI of strictly non-local observables can be used for
characterizing the phase diagrams and, in particular, for studying topological
phases, where it scales maximally. Analysing its behavior at the critical
phases we are also able to recover the scaling dimensions of the order
parameters both for local and string observables. The numerical results have
been obtained by exploiting the Density Matrix Renormalization Group algorithm
and Tensor Network techniques.
Van der Waals magnetic materials are currently of great interest as materials
for applications in future ultrathin nanoelectronics and nanospintronics. Due
to weak coupling between individual monolayers, these materials can be easily
obtained in the monolayer and bilayer forms. The latter are of specific
interest as they may be considered as natural two-dimensional spin valves. In
this paper, we study theoretically spin waves in bilayers of transition metal
dichalcogenides. The considerations are carried within the general spin wave
theory based on effective spin Hamiltonian and Hollstein-Primakoff-Bogolubov
transformation. The spin Hamiltonian includes intra-layer as well as
inter-layer nearest-neighbour exchange interactions, easy-plane anisotropy, and
additionally a weak in-plane easy-axis anisotropy. The bilayer systems consist
of two ferromagnetic (in-plane magnetization) monolayers that are coupled
either ferromagnetically or antiferromagnetically. In the latter case, we
analyse the spin wave spectra in all magnetic phases, i.e. in the
antiferromagnetic, spin-flop, and ferromagnetic ones.
The interplay between Coulomb interaction, electron-phonon coupling, and
phonon-phonon coupling has a significant impact on the low-energy behavior of
three-dimensional type-I tilted Dirac semimetals. To investigate this
phenomenon, we construct an effective theory, calculate one-loop corrections
contributed by all these interactions, and establish the coupled
energy-dependent flows of all associated interaction parameters by adopting the
renormalization group approach. Deciphering such coupled evolutions allows us
to determine a series of low-energy critical outcomes for these materials. At
first, we present the low-energy tendencies of all interaction parameters. The
tilting parameter exhibits distinct tendencies that depend heavily upon the
initial anisotropy of fermion velocities. In comparison, the latter is mainly
dominated by its initial value but less sensitive to the former. With the
variance of these two quantities, parts of the interaction parameters are
driven towards the strong anisotropy in the low-energy, indicating the screened
interaction in certain directions, while others tend to move towards an
approximate isotropy. Additionally, we observe that the tendencies of
interaction parameters can be qualitatively clustered into three distinct types
of fixed points, accompanying the potential instabilities around which certain
interaction-driven phase transition is triggered. Furthermore, approaching such
fixed points leads to physical quantities, such as the density of states,
compressibility, and specific heat, exhibiting behavior that is quite different
from their non-interacting counterparts and even deviates slightly from
Fermi-liquid behavior. Our investigation sheds light on the intricate
relationship between different types of interactions in these semimetals and
provides useful insights into their fundamental properties.
Emerging altermagnetic materials with vanishing net magnetizations and unique
band structures have been envisioned as an ideal electrode to design
antiferromagnetic tunnel junctions. Their momentum-resolved spin splitting in
band structures defines a spin-polarized Fermi surface, which allows
altermagnetic materials to polarize current as a ferromagnet, when the current
flows along specific directions relevant to their altermagnetism. Here, we
design an Altermagnet/Insulator barrier/Ferromagnet junction, renamed as
altermagnetic tunnel junction (ATMTJ), using RuO$_2$/TiO$_2$/CrO$_2$ as a
prototype. Through first-principles calculations, we investigate the tunneling
properties of the ATMTJ along the [001] and [110] directions, which shows that
the tunneling magnetoresistance (TMR) is almost zero when the current flows
along the [001] direction, while it can reach as high as 6100\% with current
flows along the [110] direction. The spin-resolved conduction channels of the
altermagnetic RuO$_2$ electrode are found responsible for this
momentum-dependent (or transport-direction-dependent) TMR effect. Furthermore,
this ATMTJ can also be used to readout the N\'{e}el vector of the altermagnetic
electrode RuO$_2$. Our work promotes the understanding toward the altermagnetic
materials and provides an alternative way to design magnetic tunnel junctions
with ultrahigh TMR ratios and robustness of the altermagnetic electrode against
external disturbance, which broadens the application avenue for
antiferromagnetic spintronic devices.
The fractional quantum anomalous Hall effect (FQAHE), the analog of the
fractional quantum Hall effect1 at zero magnetic field, is predicted to exist
in topological flat bands under spontaneous time-reversal-symmetry breaking.
The demonstration of FQAHE could lead to non-Abelian anyons which form the
basis of topological quantum computation. So far, FQAHE has been observed only
in twisted MoTe2 (t-MoTe2) at moire filling factor v > 1/2. Graphene-based
moire superlattices are believed to host FQAHE with the potential advantage of
superior material quality and higher electron mobility. Here we report the
observation of integer and fractional QAH effects in a rhombohedral pentalayer
graphene/hBN moire superlattice. At zero magnetic field, we observed plateaus
of quantized Hall resistance Rxy = h/(ve^2) at filling factors v = 1, 2/3, 3/5,
4/7, 4/9, 3/7 and 2/5 of the moire superlattice respectively. These features
are accompanied by clear dips in the longitudinal resistance Rxx. In addition,
at zero magnetic field, Rxy equals 2h/e^2 at v = 1/2 and varies linearly with
the filling factor-similar to the composite Fermi liquid (CFL) in the
half-filled lowest Landau level at high magnetic fields. By tuning the gate
displacement field D and v, we observed phase transitions from CFL and FQAH
states to other correlated electron states. Our graphene system provides an
ideal platform for exploring charge fractionalization and (non-Abelian) anyonic
braiding at zero magnetic field, especially considering a lateral junction
between FQAHE and superconducting regions in the same device.
In a recent experiment on the interlayer magnetoresistance in the
quasi-two-dimensional organic salt, $\alpha$-(BEDT-TTF)$_2$I$_3$, it has been
observed that at low temperatures, interlayer tunneling attains phase
coherence, leading to the emergence of a three-dimensional electronic
structure. Theoretically and experimentally it has been suggested that the
system exhibits characteristics of a three-dimensional Dirac semimetal as a
consequence of broken time-reversal symmetry and inversion symmetry. Here, we
perform a theoretical calculation of the magnetoconductivity under an in-plane
magnetic field and demonstrate that the system displays a planar Hall effect.
Our calculations are based on a realistic model for
$\alpha$-(BEDT-TTF)$_2$I$_3$ incorporating interlayer tunneling and the tilt of
the Dirac cone. Given that the planar Hall effect is anticipated as a
consequence of chiral anomaly, our findings provide support for the
classification of $\alpha$-(BEDT-TTF)$_2$I$_3$ as a three-dimensional Dirac
semimetal.
Spin waves, collective dynamic magnetic excitations, offer crucial insights
into magnetic material properties. Rare-earth iron garnets offer an ideal
spin-wave (SW) platform with long propagation length, short wavelength,
gigahertz frequency, and applicability to magnon spintronic platforms. Of
particular interest, thulium iron garnet (TmIG) has attracted a huge interest
recently due to its successful growth down to a few nanometers, observed
topological Hall effect and spin orbit torque-induced switching effects.
However, there is no direct spatial measurement of its SW properties. This work
uses diamond nitrogen vacancy (NV) magnetometry in combination with SW
electrical transmission spectroscopy to study SW transport properties in TmIG
thin films. NV magnetometry allows probing spin waves at the sub-micrometer
scale, seen by the amplification of the local microwave magnetic field due to
the coupling of NV spin qubits with the stray magnetic field produced by the
microwave-excited spin waves. By monitoring the NV spin resonances, the SW
properties in TmIG thin films are measured as function of the applied magnetic
field, including their amplitude, decay length (~ 50 um), and wavelength (0.8 -
2 um). These results pave the way for studying spin qubit-magnon interactions
in rare-earth magnetic insulators, relevant to quantum magnonics applications.
We show that Rashba spin-orbit interaction (RSOI) modifies electron-electron
interaction vertex giving rise to a spectrum of novel phenomena. First, the
spin-orbit-modified Coulomb interactions induce $p$-wave superconducting order,
without any need for other mediators of attraction. Remarkably, two distinct
superconducting phases arise in 3D systems, mirroring the $\mathrm{A}$ or
$\mathrm{B}$ phases of $^3\mathrm{He}$, depending on the sign of the SOI
constant. In contrast, 2D systems exhibit $p^x\pm i p^y$ order parameter,
leading to time-reversal-invariant topological superconductivity. Second, a
sufficiently strong RSOI induces ferromagnetic ordering. It is associated with
a deformation of the Fermi surface, which may lead to a Lifshitz transition
from a spherical to a toroidal Fermi surface, with a number of experimentally
observable signatures. Finally, in sufficiently clean Rashba materials,
ferromagnetism and $p$-wave superconductivity may coexist. This state resembles
the $\mathrm{A}_1$ phase of $^3\mathrm{He}$, yet it may avoid nodal points due
to the toroidal shape of the Fermi surface.
We study the dc photocurrent induced by linearly polarized light in a
multiband Dirac-electron system, focusing on the organic conductor
$\alpha$-(BEDT-TTF)$_2$I$_3$. Utilizing perturbation theory, we predict the
dependence of shift current on the frequency of light in photodriven
$\alpha$-(BEDT-TTF)$_2$I$_3$. Our findings demonstrate a strong correlation
between the frequency of light and both the magnitude and direction of the
shift current. Furthermore, we delve into the nonperturbative effects of
nonlinear optical responses using Floquet theory and demonstrate how the sign
of the optical response changes with increasing light intensity. Our results
unveil remarkable optical phenomena in the multiband Dirac-electron system and
are anticipated to be observed in future experiments.

Date of feed: Tue, 21 Nov 2023 01:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Probing the tunable multi-cone bandstructure in Bernal bilayer graphene. (arXiv:2311.10816v1 [cond-mat.mes-hall])**

Anna M. Seiler, Nils Jacobsen, Martin Statz, Noelia Fernandez, Francesca Falorsi, Kenji Watanabe, Takashi Taniguchi, Zhiyu Dong, Leonid S. Levitov, R. Thomas Weitz

**Fractional Hall physics from large $N$ interacting fermions. (arXiv:2311.10818v1 [hep-th])**

Kristan Jensen, Amir Raz

**Scaling laws of failure dynamics on complex networks. (arXiv:2311.10850v1 [cond-mat.dis-nn])**

G. Pál, Zs. Danku, A. Batool, V. Kádár, N. Yoshioka, N. Ito, G. Ódor, F. Kun

**Wave function propagation in a two-dimensional paramagnetic semiconductor from an impurity. (arXiv:2311.10853v1 [cond-mat.mes-hall])**

Josh Wanninger, Gonzalo Ordonez

**Research on solitons interactions' in one-dimensional indium chains on Si(111) surfaces. (arXiv:2311.10860v1 [cond-mat.mtrl-sci])**

Yu Yao, Chaojie Luo, Xiuxia Wang, Hui Zhang

**Graphene-like nanoribbons connected by four-/five- membered rings on pentacene/picene precursors, Au(110) surface. (arXiv:2311.10889v1 [cond-mat.mes-hall])**

Yu Yao, Shuangxiang Wu, Hui Zhang

**Structural and magnetic properties of molecular beam epitaxy (MnSb2Te4)x(Sb2Te3)1-x topological materials with exceedingly high Curie temperature. (arXiv:2311.10891v1 [cond-mat.mtrl-sci])**

Candice R. Forrester, Christophe Testelin, Kaushini Wickramasinghe, Ido Levy, Dominique Demaille, David Hrabovski, Xiaxin Ding, Lia Krusin-Elbaum, Gustavo E. Lopez, Maria C. Tamargo

**Hydrogen Doping Induced $p_x\pm ip_y$ Triplet Superconductivity in Quasi-One-Dimensional K$_2$Cr$_3$As$_3$. (arXiv:2311.10942v1 [cond-mat.supr-con])**

Ming Zhang, Chen Lu, Yajiang Chen, Yunbo Zhang, Fan Yang

**Observation of a Topological Phase Transition in Random Coaxial Cable Structures with Chiral Symmetry. (arXiv:2311.11040v1 [cond-mat.dis-nn])**

D. M. Whittaker, Maxine M. McCarthy, Qingqing Duan

**Exotic Symmetry Breaking Properties of Self-Dual Fracton Spin Models. (arXiv:2311.11066v1 [quant-ph])**

Giovanni Canossa, Lode Pollet, Miguel A. Martin-Delgado, Hao Song, Ke Liu

**Design of spin-orbital-textures in ferromagnetic/topological insulator interfaces. (arXiv:2311.11084v1 [cond-mat.mes-hall])**

A. L. Araújo, F. Crasto de Lima, C. H. Lewenkopf, A. Fazzio

**Quantum defects in 2D transition metal dichalcogenides for THz-technologies. (arXiv:2311.11092v1 [cond-mat.mtrl-sci])**

Jingda Zhang, Su Ying Quek

**A hybrid pulsed laser deposition approach to grow thin films of chalcogenides. (arXiv:2311.11146v1 [cond-mat.mtrl-sci])**

Mythili Surendran, Shantanu Singh, Huandong Chen, Claire Wu, Amir Avishai, Yu-Tsun Shao, Jayakanth Ravichandran

**Atomistic mechanism of friction force independence on the normal load and other friction laws for dynamic structural superlubricity. (arXiv:2311.11173v1 [physics.comp-ph])**

Nikolay V. Brilliantov, Alexey A. Tsukanov, Artem K. Grebenko, Albert G. Nasibulin, Igor A. Ostanin

**Non-Hermitian effect to the ballistic transport and quantized Hall conductivity in an operable experimental platform. (arXiv:2311.11276v1 [cond-mat.mes-hall])**

Chen-Huan Wu, Yida Li

**Fermi surface topology and electronic transport properties of a chiral crystal NbGe$_2$ with strong electron-phonon interaction. (arXiv:2311.11341v1 [cond-mat.str-el])**

Yoshiki J. Sato, Ai Nakamura, Rei Nishinakayama, Ryuji Okazaki, Hisatomo Harima, Dai Aoki

**Discovery of Superconductivity and Electron-Phonon Drag in the Non-Centrosymmetric Semimetal LaRhGe$_3$. (arXiv:2311.11402v1 [cond-mat.supr-con])**

Mohamed Oudah, Hsiang-Hsi Kung, Samikshya Sahu, Niclas Heinsdorf, Armin Schulz, Kai Philippi, Marta-Villa De Toro Sanchez, Yipeng Cai, Kenji Kojima, Andreas P. Schnyder, Hidenori Takagi, Bernhard Keimer, Doug A. Bonn, Alannah M. Hallas

**The fate of high winding number topological phases in the disordered extended Su-Schrieffer-Heeger model. (arXiv:2311.11405v1 [cond-mat.str-el])**

Emmanuele G. Cinnirella, Andrea Nava, Gabriele Campagnano, Domenico Giuliano

**Massive spin-flip excitations in a $\nu = 2$ quantum Hall ferromagnet. (arXiv:2311.11418v1 [cond-mat.str-el])**

S. Dickmann, P. S. Berezhnoy

**Graphene-perovskite fibre photodetectors. (arXiv:2311.11450v1 [physics.app-ph])**

S. Akhavan, A. Taheri Najafabadi, S. Mignuzzi, M. Abdi Jalebi, A. Ruocco, I. Paradisanos, O. Balci, Z. Andaji-Garmaroudi, I. Goykhman, L. G. Occhipinti, E. Lidorikis, S. D. Stranks, A. C. Ferrari

**Observation of multiple van Hove singularities and correlated electronic states in a new topological ferromagnetic kagome metal NdTi3Bi4. (arXiv:2311.11488v1 [cond-mat.mtrl-sci])**

Mazharul Islam Mondal, Anup Pradhan Sakhya, Milo Sprague, Brenden R. Ortiz, Matthew Matzelle, Barun Ghosh, Nathan Valadez, Iftakhar Bin Elius, Arun Bansil, Madhab Neupane

**Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime mapping. (arXiv:2311.11502v1 [cond-mat.str-el])**

Suheng Xu, Yutao Li, Rocco A. Vitalone, Ran Jing, Aaron J. Sternbach, Shuai Zhang, Julian Ingham, Milan Delor, James. W. McIver, Matthew Yankowitz, Raquel Queiroz, Andrew J. Millis, Michael M. Fogler, Cory R. Dean, James Hone, Mengkun Liu, D.N. Basov

**Absence of metallicity and bias-dependent resistivity in low-carrier-density EuCd2As2. (arXiv:2311.11515v1 [cond-mat.mes-hall])**

Yuxiang Wang, Jianwen Ma, Jian Yuan, Wenbin Wu, Yong Zhang, Yicheng Mou, Jiaming Gu, Peihong Cheng, Wu Shi, Xiang Yuan, Jinglei Zhang, Yanfeng Guo, Cheng Zhang

**Magnetic-field-induced nonlinear transport in HfTe5. (arXiv:2311.11517v1 [cond-mat.mes-hall])**

Cheng Zhang, Jinshan Yang, Zhongbo Yan, Xiang Yuan, Yanwen Liu, Minhao Zhao, Alexey Suslov, Jinglei Zhang, Li Pi, Zhong Wang, Faxian Xiu

**Thermal Hall effects due to topological spin fluctuations in YMnO$_3$. (arXiv:2311.11527v1 [cond-mat.str-el])**

Ha-Leem Kim, Takuma Saito, Heejun Yang, Hiroaki Ishizuka, Matthew John Coak, Jun Han Lee, Hasung Sim, Yoon Seok Oh, Naoto Nagaosa, Je-Geun Park

**Interference and switching effect of topological interfacial modes with geometric phase. (arXiv:2311.11556v1 [physics.optics])**

Xing-Xiang Wang, Tomohiro Amemiya, Xiao Hu

**Quantum geometric bound and ideal condition for Euler band topology. (arXiv:2311.11577v1 [cond-mat.mes-hall])**

Soonhyun Kwon, Bohm-Jung Yang

**Getting topological invariants from snapshots: a protocol for defining and calculating topological invariants of systems with discrete parameter space. (arXiv:2311.11618v1 [cond-mat.mes-hall])**

Youjiang Xu, Walter Hofstetter

**Antiferromagnetic topological insulator with selectively gapped Dirac cones. (arXiv:2311.11620v1 [cond-mat.mes-hall])**

A. Honma, D. Takane, S. Souma, K. Yamauchi, Y. Wang, K. Nakayama, K. Sugawara, M. Kitamura, K. Horiba, H. Kumigashira, K. Tanaka, T. K. Kim, C. Cacho, T. Oguchi, T. Takahashi, Yoichi Ando, T. Sato

**Nonequilibrium protection effect and spatial localization of noise-induced fluctuations under gas flow scattering on partially penetrable obstacle. (arXiv:2311.11658v1 [cond-mat.stat-mech])**

S.P. Lukyanets, O.V. Kliushnichenko

**Precursors to Topological Phase Transition in Topological Ladders. (arXiv:2311.11673v1 [cond-mat.mes-hall])**

Seungju Han, Mahn-Soo Choi

**Emergence of new topological gapless phases in the modified square-lattice Kitaev model. (arXiv:2311.11684v1 [cond-mat.str-el])**

Jihyeon Park, Gun Sang Jeon

**Tailored Perdew-Burke-Ernzerhof functionals for improved band gap predictions in Zn monochalcogenides. (arXiv:2311.11702v1 [cond-mat.mtrl-sci])**

Satadeep Bhattacharjee, Namitha Anna Koshi, Seung-Cheol Lee

**Interlayer electric multipoles induced by in-plane field from quantum geometric origins. (arXiv:2311.11710v1 [cond-mat.mes-hall])**

Huiyuan Zheng, Dawei Zhai, Cong Xiao, Wang Yao

**Orbital Hall effect and topology on a two-dimensional triangular lattice: from bulk to edge. (arXiv:2311.11715v1 [cond-mat.mes-hall])**

Anderson L. R. Barbosa, Luis M. Canonico, Jose H. Garía, Tatiana G. Rappoport

**Effective Hamiltonian of topologically protected qubit in a helical crystal. (arXiv:2311.11748v1 [cond-mat.mes-hall])**

R. A. Niyazov, D. N. Aristov, V. Yu. Kachorovskii

**Surface spin polarization in the magnetic response of GeTe Rashba ferroelectric. (arXiv:2311.11831v1 [cond-mat.mes-hall])**

A.A. Avakyants, N.N. Orlova, A.V. Timonina, N.N. Kolesnikov, E.V. Deviatov

**Quantum dots on the InAs(110) cleavage surface created by atom manipulation. (arXiv:2311.11848v1 [cond-mat.mes-hall])**

Van Dong Pham, Yi Pan, Steven C. Erwin, Stefan Fölsch

**Orbital Kerr effect and terahertz detection via the nonlinear Hall effect. (arXiv:2311.11889v1 [cond-mat.mtrl-sci])**

Diego Garcia Ovalle, Armando Pezo, Aurélien Manchon

**Novel implementations for reservoir computing -- from spin to charge. (arXiv:2311.11929v1 [physics.app-ph])**

Karin Everschor-Sitte, Atreya Majumdar, Katharina Wolk, Dennis Meier

**Spin Hall conductivity in Bi$_{1-x}$Sb$_x$ as an experimental test of bulk-boundary correspondence. (arXiv:2311.11933v1 [cond-mat.mes-hall])**

Yongxi Ou, Wilson Yanez-Parreño, Yu-sheng Huang, Supriya Ghosh, Cüneyt Şahin, Max Stanley, Sandra Santhosh, Saurav Islam, Anthony Richardella, K. Andre Mkhoyan, Michael E. Flatté, Nitin Samarth

**An on-chip platform for multi-degree-of-freedom control of two-dimensional quantum and nonlinear materials. (arXiv:2311.12030v1 [cond-mat.mes-hall])**

Haoning Tang, Yiting Wang, Xueqi Ni, Kenji Watanabe, Takashi Taniguchi, Shanhui Fan, Eric Mazur, Amir Yacoby, Yuan Cao

**Topological Diagnosis of Strongly Correlated Electron Systems. (arXiv:2311.12031v1 [cond-mat.str-el])**

Chandan Setty, Fang Xie, Shouvik Sur, Lei Chen, Silke Paschen, Maia G. Vergniory, Jennifer Cano, Qimiao Si

**Bridging the gap between numerics and experiment in free standing graphene. (arXiv:2104.09655v2 [cond-mat.str-el] UPDATED)**

Maksim Ulybyshev, Savvas Zafeiropoulos, Christopher Winterowd, Fakher Assaad

**Valence fluctuation in Ce$_2$Re$_3$Si$_5$ and Ising-type magnetic ordering in Pr$_2$Re$_3$Si$_5$ single crystals. (arXiv:2111.12597v2 [cond-mat.str-el] UPDATED)**

Suman Sanki, Vikash Sharma, Souvik Sasmal, Vikas Saini, Gaurav dwari, Bishal Baran Maity, Ruta Kulkarni, A. Thamizhavel

**A new phase pentlandite. (arXiv:2210.13348v3 [physics.chem-ph] UPDATED)**

Y Liu, SH Mei, LP Wang

**Light-Induced Transitions of Polar State and Domain Morphology of Photo-Ferroelectric Nanoparticles. (arXiv:2303.04904v3 [cond-mat.mtrl-sci] UPDATED)**

Eugene A. Eliseev, Anna N. Morozovska, Yulian M. Vysochanskii, Lesya P. Yurchenko, Venkatraman Gopalan, Long-Qing Chen

**Scanning Tunneling Microscopy Study of Epitaxial Fe3GeTe2 Monolayers on Bi2Te3. (arXiv:2303.10113v2 [cond-mat.mtrl-sci] UPDATED)**

Brad M. Goff, Alexander J. Bishop, Wenyi Zhou, Ryan Bailey-Crandell, Katherine Robinson, Roland K. Kawakami, Jay A. Gupta

**GlassNet: a multitask deep neural network for predicting many glass properties. (arXiv:2303.15538v3 [cond-mat.soft] UPDATED)**

Daniel R. Cassar

**Tunable helical crystals. (arXiv:2305.08242v2 [cond-mat.mes-hall] UPDATED)**

R. A. Niyazov, D. N. Aristov, V. Yu. Kachorovskii

**Quantum Fisher Information and multipartite entanglement in spin-1 chains. (arXiv:2307.02407v2 [quant-ph] UPDATED)**

Federico Dell'Anna, Sunny Pradhan, Cristian Degli Esposti Boschi, Elisa Ercolessi

**Spin waves in bilayers of transition-metal dichalcogenides. (arXiv:2307.13414v2 [cond-mat.mes-hall] UPDATED)**

Wojciech Rudziński, Józef Barnaś, Anna Dyrdał

**Critical fates induced by interaction competition in the three-dimensional tilted Dirac semimetals. (arXiv:2307.13436v3 [cond-mat.str-el] UPDATED)**

Jing Wang, Jie-Qiong Li, Wen-Hao Bian, Qiao-Chu Zhang, Xiao-Yue Ren

**Crystal facet orientated Altermagnets for detecting ferromagnetic and antiferromagnetic states by giant tunneling magnetoresistance effect. (arXiv:2309.09561v2 [cond-mat.mtrl-sci] UPDATED)**

Boyuan Chi, Leina Jiang, Yu Zhu, Guoqiang Yu, Caihua Wan, Jia Zhang, Xiufeng Han

**Fractional Quantum Anomalous Hall Effect in a Graphene Moire Superlattice. (arXiv:2309.17436v3 [cond-mat.mes-hall] UPDATED)**

Zhengguang Lu, Tonghang Han, Yuxuan Yao, Aidan P. Reddy, Jixiang Yang, Junseok Seo, Kenji Watanabe, Takashi Taniguchi, Liang Fu, Long Ju

**Theory for Planar Hall Effect in Organic Dirac Fermion System. (arXiv:2310.04066v2 [cond-mat.str-el] UPDATED)**

Yuki Nakamura, Takao Morinari

**Mapping of Spin-Wave Transport in Thulium Iron Garnet Thin Films Using Diamond Quantum Microscopy. (arXiv:2310.06188v2 [cond-mat.mes-hall] UPDATED)**

Rupak Timalsina, Haohan Wang, Bharat Giri, Adam Erickson, Xiaoshan Xu, Abdelghani Laraoui

**Electron Interactions in Rashba Materials. (arXiv:2310.20084v2 [cond-mat.supr-con] UPDATED)**

Yasha Gindikin, Alex Kamenev

**Nonlinear optical response in multiband Dirac-Electron System. (arXiv:2311.07176v2 [cond-mat.mes-hall] UPDATED)**

Keisuke Kitayama, Masao Ogata

Found 10 papers in prb In this study, we establish circuit-theoretical bulk-edge correspondences to indicate the existence of surface plasmon polaritons topologically. First, we reveal an essential topological transition in a minimal circuit model of a composite right-/left-handed transmission line. We then demonstrate th… Magnetic Weyl semimetals can reveal a renowned electronic transport phenomenon, i.e., the anomalous Hall effect due to the intrinsic Berry curvature promoted by the Weyl fermions. Here, the layered kagome compound ${\mathrm{Rh}}_{3}{\mathrm{Sn}}_{2}{\mathrm{S}}_{2}$ is identified as a ferromagnetic … Rare-earth atoms on top of 2D materials represent an interesting platform with the prospect of tailoring the magnetic anisotropy for practical applications. Here, we investigate the ground state and magnetic properties of selected $4f$ atoms deposited on a graphene substrate in the framework of the … We study one-dimensional hybrid quantum circuits perturbed by quenched quasiperiodic (QP) modulations across the measurement-induced phase transition (MIPT). Considering non-Pisot QP structures, characterized by unbounded fluctuations, allows us to tune the wandering exponent $β$ to exceed the Luck … Chain-mapping techniques combined with the time-dependent density matrix renormalization group are powerful tools for simulating the dynamics of open quantum systems interacting with structured bosonic environments. Most interestingly, they leave the degrees of freedom of the environment open to ins… ${\mathrm{Fe}}_{n=4,5}{\mathrm{GeTe}}_{2}$ exhibits quasi-two-dimensional properties as a promising candidate for a near-room-temperature ferromagnet, which has attracted great interest. In this work, we notice that the crystal lattice of ${\mathrm{Fe}}_{n=4,5}{\mathrm{GeTe}}_{2}$ can be approximate… Nontrivial topological phases in electronic materials are often associated with the quantization of the Hall conductivity. Here, the author introduces a photonic analogue of this phenomenon. It is shown that the physical acceleration of a material can induce a photon flow in a direction perpendicular to the acceleration, analogous to the electronic Hall effect. For nonreciprocal materials, the response function linking the induced energy flow with the acceleration is quantized and is determined by the photonic gap Chern number. Magnetic topological materials have attracted much attention due to the interplay between magnetism and topological electronic band structure, which may not only generate new exotic quantum states but also bring great potential applications. Here, we present Seebeck and Nernst effects in the magneti… The study of the nonlinear anomalous Hall effect (NLAHE) in $\mathcal{P}\mathcal{T}$-symmetric systems has focused on intrinsic mechanisms. Here, we show that disorder contributes substantially to NLAHE and often overwhelms intrinsic terms. We identify terms to zeroth order in the disorder strength … The existence of spontaneous magnetization that fingerprints a ground-state ferromagnetic order was recently observed in two-dimensional (2D) van der Waals materials. Despite progress in the fabrication and manipulation of the atom-thick magnets, investigation of nanoscale magnetization properties i…

Date of feed: Tue, 21 Nov 2023 04:17:08 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Bulk-edge correspondences for surface plasmon polaritons: A circuit approach**

Yosuke Nakata, Toshihiro Nakanishi, Ryo Takahashi, Fumiaki Miyamaru, and Shuichi Murakami

Author(s): Yosuke Nakata, Toshihiro Nakanishi, Ryo Takahashi, Fumiaki Miyamaru, and Shuichi Murakami

[Phys. Rev. B 108, 174105] Published Mon Nov 20, 2023

**In-plane canted ferromagnetism, intrinsic Weyl fermions, and large anomalous Hall effect in the kagome semimetal ${\mathrm{Rh}}_{3}{\mathrm{Sn}}_{2}{\mathrm{S}}_{2}$**

Meng-Xin Wu, Yu-Hao Wei, Da-Shuai Ma, Peng Wang, Nan Gao, Shao-Yi Wu, and Min-Quan Kuang

Author(s): Meng-Xin Wu, Yu-Hao Wei, Da-Shuai Ma, Peng Wang, Nan Gao, Shao-Yi Wu, and Min-Quan Kuang

[Phys. Rev. B 108, 174430] Published Mon Nov 20, 2023

**Magnetic properties of $4f$ adatoms on graphene: Density functional theory investigations**

Johanna P. Carbone, Juba Bouaziz, Gustav Bihlmayer, and Stefan Blügel

Author(s): Johanna P. Carbone, Juba Bouaziz, Gustav Bihlmayer, and Stefan Blügel

[Phys. Rev. B 108, 174431] Published Mon Nov 20, 2023

**Measurement induced criticality in quasiperiodic modulated random hybrid circuits**

Gal Shkolnik, Aidan Zabalo, Romain Vasseur, David A. Huse, J. H. Pixley, and Snir Gazit

Author(s): Gal Shkolnik, Aidan Zabalo, Romain Vasseur, David A. Huse, J. H. Pixley, and Snir Gazit

[Phys. Rev. B 108, 184204] Published Mon Nov 20, 2023

**Thermal cycle and polaron formation in structured bosonic environments**

Angela Riva, Dario Tamascelli, Angus J. Dunnett, and Alex W. Chin

Author(s): Angela Riva, Dario Tamascelli, Angus J. Dunnett, and Alex W. Chin

[Phys. Rev. B 108, 195138] Published Mon Nov 20, 2023

**Flat bands and magnetism in ${\mathrm{Fe}}_{4}{\mathrm{GeTe}}_{2}$ and ${\mathrm{Fe}}_{5}{\mathrm{GeTe}}_{2}$ due to bipartite crystal lattices**

Fuyi Wang and Haijun Zhang

Author(s): Fuyi Wang and Haijun Zhang

[Phys. Rev. B 108, 195140] Published Mon Nov 20, 2023

**Shaking photons out of a topological material**

Mário G. Silveirinha

Author(s): Mário G. Silveirinha

[Phys. Rev. B 108, 205142] Published Mon Nov 20, 2023

**Large power factor, anomalous Nernst effect, and temperature-dependent thermoelectric quantum oscillations in the magnetic Weyl semimetal NdAlSi**

Qing-Xin Dong, Jin-Feng Wang, Li-Bo Zhang, Jian-Li Bai, Qiao-Yu Liu, Jing-Wen Cheng, Pin-Yu Liu, Cun-Dong Li, Jun-Sen Xiang, Zhi-An Ren, Pei-Jie Sun, and Gen-Fu Chen

Author(s): Qing-Xin Dong, Jin-Feng Wang, Li-Bo Zhang, Jian-Li Bai, Qiao-Yu Liu, Jing-Wen Cheng, Pin-Yu Liu, Cun-Dong Li, Jun-Sen Xiang, Zhi-An Ren, Pei-Jie Sun, and Gen-Fu Chen

[Phys. Rev. B 108, 205143] Published Mon Nov 20, 2023

**Disorder in the nonlinear anomalous Hall effect of $\mathcal{PT}$-symmetric Dirac fermions**

Rhonald Burgos Atencia, Di Xiao, and Dimitrie Culcer

Author(s): Rhonald Burgos Atencia, Di Xiao, and Dimitrie Culcer

[Phys. Rev. B 108, L201115] Published Mon Nov 20, 2023

**Exciton localization on a magnetic domain wall in ${\mathrm{MoSe}}_{2}\text{−}{\mathrm{CrI}}_{3}$ heterostructures**

S. Mikkola, I. Chestnov, I. Iorsh, and V. Shahnazaryan

Author(s): S. Mikkola, I. Chestnov, I. Iorsh, and V. Shahnazaryan

[Phys. Rev. B 108, L201403] Published Mon Nov 20, 2023

Found 1 papers in prl A new method based on AlphaFold2 improves the precision of single-mutation predictions for protein folding.

Date of feed: Tue, 21 Nov 2023 04:17:11 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **AlphaFold2 Can Predict Single-Mutation Effects**

John M. McBride, Konstantin Polev, Amirbek Abdirasulov, Vladimir Reinharz, Bartosz A. Grzybowski, and Tsvi Tlusty

Author(s): John M. McBride, Konstantin Polev, Amirbek Abdirasulov, Vladimir Reinharz, Bartosz A. Grzybowski, and Tsvi Tlusty

[Phys. Rev. Lett. 131, 218401] Published Mon Nov 20, 2023

Found 1 papers in prx Models of systems in physics usually start with elementary processes. New work with a neural network shows how models can also be built by observing the system as a whole and deducing the underlying interactions.

Date of feed: Tue, 21 Nov 2023 04:17:13 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Learning Interacting Theories from Data**

Claudia Merger, Alexandre René, Kirsten Fischer, Peter Bouss, Sandra Nestler, David Dahmen, Carsten Honerkamp, and Moritz Helias

Author(s): Claudia Merger, Alexandre René, Kirsten Fischer, Peter Bouss, Sandra Nestler, David Dahmen, Carsten Honerkamp, and Moritz Helias

[Phys. Rev. X 13, 041033] Published Mon Nov 20, 2023

Found 19 papers in nano-lett

Date of feed: Mon, 20 Nov 2023 14:10:31 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **[ASAP] Multistage Filtration Desalination via Ion Self-Rejection Effect in Cation-Controlled Graphene Oxide Membrane under 1 Bar Operating Pressure**

Junjie Chen, Xing Liu, Zhoule Ding, Zhenglin He, Huixiong Jiang, Kaiyuan Zhu, Yunzhang Li, and Guosheng ShiNano LettersDOI: 10.1021/acs.nanolett.3c03105

**[ASAP] High-Performance Complementary Circuits from Two-Dimensional MoTe2**

Jun Cai, Zheng Sun, Peng Wu, Rahul Tripathi, Hao-Yu Lan, Jing Kong, Zhihong Chen, and Joerg AppenzellerNano LettersDOI: 10.1021/acs.nanolett.3c03184

**[ASAP] Phonon Chirality Manipulation Mechanism in Transition-Metal Dichalcogenide Interlayer-Sliding Ferroelectrics**

Hao Chen, Qianqian Wang, Xukun Feng, Weikang Wu, and Lifa ZhangNano LettersDOI: 10.1021/acs.nanolett.3c03787

**[ASAP] Fatigue Response of MoS2 with Controlled Introduction of Atomic Vacancies**

Yolanda Manzanares-Negro, Aitor Zambudio, Guillermo López-Polín, Soumya Sarkar, Manish Chhowalla, Julio Gómez-Herrero, and Cristina Gómez-NavarroNano LettersDOI: 10.1021/acs.nanolett.3c02479

**[ASAP] Photoluminescence Enhancement of Monolayer WS2 by n-Doping with an Optically Excited Gold Disk**

Bayarjargal N. Tugchin, Nathan Doolaard, Angela I. Barreda, Zifei Zhang, Anastasia Romashkina, Stefan Fasold, Isabelle Staude, Falk Eilenberger, and Thomas PertschNano LettersDOI: 10.1021/acs.nanolett.3c03053

**[ASAP] Magnetotransport Signatures of Superconducting Cooper Pairs Carried by Topological Surface States in Bismuth Selenide**

Raj Kumar, Cristian V. Ciobanu, Somilkumar J. Rathi, Joseph E. Brom, Joan M. Redwing, and Frank HunteNano LettersDOI: 10.1021/acs.nanolett.3c02795

**[ASAP] Giant and Controllable Valley Currents in Graphene by Double Pumped THz Light**

Sangeeta Sharma, Deepika Gill, and Samuel ShallcrossNano LettersDOI: 10.1021/acs.nanolett.3c02874

**[ASAP] Modulating the Electrochemical Intercalation of Graphene Interfaces with α-RuCl3 as a Solid-State Electron Acceptor**

Jonathon Nessralla, Daniel T. Larson, Takashi Taniguchi, Kenji Watanabe, Efthimios Kaxiras, and D. Kwabena BediakoNano LettersDOI: 10.1021/acs.nanolett.3c02877

**[ASAP] Gate-Tuning Hybrid Polaritons in Twisted α-MoO3/Graphene Heterostructures**

Zhou Zhou, Renkang Song, Junbo Xu, Xiang Ni, Zijia Dang, Zhichen Zhao, Jiamin Quan, Siyu Dong, Weida Hu, Di Huang, Ke Chen, Zhanshan Wang, Xinbin Cheng, Markus B. Raschke, Andrea Alù, and Tao JiangNano LettersDOI: 10.1021/acs.nanolett.3c03769

**[ASAP] Nanoparticle Deep-Subwavelength Dynamics Empowered by Optical Meron–Antimeron Topology**

Chengfeng Lu, Bo Wang, Xiang Fang, Din Ping Tsai, Weiming Zhu, Qinghua Song, Xiao Deng, Tao He, Xiaoyun Gong, Hong Luo, Zhanshan Wang, Xinhua Dai, Yuzhi Shi, and Xinbin ChengNano LettersDOI: 10.1021/acs.nanolett.3c03351

**[ASAP] Graphene Oxide-Mediated Regulation of Volume Exclusion and Wettability in Biomimetic Phosphorylation-Responsive Ionic Gates**

Liu Shi, Beibei Nie, Lingjun Sha, Keqin Ying, Jinlong Li, and Genxi LiNano LettersDOI: 10.1021/acs.nanolett.3c02924

**[ASAP] PZT-Enabled MoS2 Floating Gate Transistors: Overcoming Boltzmann Tyranny and Achieving Ultralow Energy Consumption for High-Accuracy Neuromorphic Computing**

Jing Chen, Ye-Qing Zhu, Xue-Chun Zhao, Zheng-Hua Wang, Kai Zhang, Zheng Zhang, Ming-Yuan Sun, Shuai Wang, Yu Zhang, Lin Han, Xiaoming Wu, and Tian-Ling RenNano LettersDOI: 10.1021/acs.nanolett.3c02721

**[ASAP] Topological Transitions and Surface Umklapp Scattering in Weakly Modulated Periodic Metasurfaces**

Kobi Cohen, Shai Tsesses, Shimon Dolev, Yael Blechman, Guy Ankonina, and Guy BartalNano LettersDOI: 10.1021/acs.nanolett.3c02759

**[ASAP] High-Performance WSe2 Top-Gate Devices with Strong Spacer Doping**

Po-Hsun Ho, Yu-Ying Yang, Sui-An Chou, Ren-Hao Cheng, Po-Heng Pao, Chao-Ching Cheng, Iuliana Radu, and Chao-Hsin ChienNano LettersDOI: 10.1021/acs.nanolett.3c02757

**[ASAP] Robustness of Trion State in Gated Monolayer MoSe2 under Pressure**

Zeya Li, Feng Qin, Chin Shen Ong, Junwei Huang, Zian Xu, Peng Chen, Caiyu Qiu, Xi Zhang, Caorong Zhang, Xiuxiu Zhang, Olle Eriksson, Angel Rubio, Peizhe Tang, and Hongtao YuanNano LettersDOI: 10.1021/acs.nanolett.3c02812

**[ASAP] Unveiling Local Optical Properties Using Nanoimaging Phase Mapping in High-Index Topological Insulator Bi2Se3 Resonant Nanostructures**

Sukanta Nandi, Shany Z. Cohen, Danveer Singh, Michal Poplinger, Pilkhaz Nanikashvili, Doron Naveh, and Tomer LewiNano LettersDOI: 10.1021/acs.nanolett.3c03128

**[ASAP] Electric Potential at the Interface of Membraneless Organelles Gauged by Graphene**

Christian Hoffmann, Gennadiy Murastov, Johannes Vincent Tromm, Jean-Baptiste Moog, Muhammad Awais Aslam, Aleksandar Matkovic, and Dragomir MilovanovicNano LettersDOI: 10.1021/acs.nanolett.3c02915

**[ASAP] Semiconducting Transition Metal Dichalcogenide Heteronanotubes with Controlled Outer-Wall Structures**

Yohei Yomogida, Mai Nagano, Zheng Liu, Kan Ueji, Md. Ashiqur Rahman, Abdul Ahad, Akane Ihara, Hiroyuki Nishidome, Takashi Yagi, Yusuke Nakanishi, Yasumitsu Miyata, and Kazuhiro YanagiNano LettersDOI: 10.1021/acs.nanolett.3c01761

**[ASAP] Submillimeter-Long WS2 Nanotubes: The Pathway to Inorganic Buckypaper**

Vojtěch Kundrát, Rita Rosentsveig, Kristýna Bukvišová, Daniel Citterberg, Miroslav Kolíbal, Shachar Keren, Iddo Pinkas, Omer Yaffe, Alla Zak, and Reshef TenneNano LettersDOI: 10.1021/acs.nanolett.3c02783

Found 4 papers in acs-nano

Date of feed: Mon, 20 Nov 2023 14:06:20 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **[ASAP] Spin-Stabilization by Coulomb Blockade in a Vanadium Dimer in WSe2**

Samuel Stolz, Bowen Hou, Dan Wang, Azimkhan Kozhakhmetov, Chengye Dong, Oliver Gröning, Joshua A. Robinson, Diana Y. Qiu, and Bruno SchulerACS NanoDOI: 10.1021/acsnano.3c04841

**[ASAP] Analysis of Strain and Defects in Tellurium-WSe2 Moiré Heterostructures Using Scanning Nanodiffraction**

Bengisu Sari, Steven E. Zeltmann, Chunsong Zhao, Philipp M. Pelz, Ali Javey, Andrew M. Minor, Colin Ophus, and Mary C. ScottACS NanoDOI: 10.1021/acsnano.3c04283

**[ASAP] Strain-Induced 2H to 1T′ Phase Transition in Suspended MoTe2 Using Electric Double Layer Gating**

Shubham Sukumar Awate, Ke Xu, Jierui Liang, Benjamin Katz, Ryan Muzzio, Vincent H. Crespi, Jyoti Katoch, and Susan K. Fullerton-ShireyACS NanoDOI: 10.1021/acsnano.3c04701

**[ASAP] Graphene-In2Se3 van der Waals Heterojunction Neuristor for Optical In-Memory Bimodal Operation**

Subhrajit Mukherjee, Debopriya Dutta, Anurag Ghosh, and Elad KorenACS NanoDOI: 10.1021/acsnano.3c03820

Found 1 papers in comm-phys Communications Physics, Published online: 14 November 2023; doi:10.1038/s42005-023-01444-1**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **An atomically tailored chiral magnet with small skyrmions at room temperature**

Roland K. Kawakami