Found 28 papers in cond-mat The nonlinear Hall effect (NLHE) with time-reversal symmetry constitutes the
appearance of a transverse voltage quadratic in the applied electric field. It
is a second-order electronic transport phenomenon that induces frequency
doubling and occurs in non-centrosymmetric crystals with large Berry curvature
-- an emergent magnetic field encoding the geometric properties of electronic
wavefunctions. The design of (opto)electronic devices based on the NLHE is
however hindered by the fact that this nonlinear effect typically appears at
low temperatures and in complex compounds characterized by Dirac or Weyl
electrons. Here, we show a strong room temperature NLHE in the centrosymmetric
elemental material bismuth synthesized in the form of technologically relevant
polycrystalline thin films. The ($1\,1\,1$) surface electrons of this material
are equipped with a Berry curvature triple that activates side jumps and skew
scatterings generating nonlinear transverse currents. We also report a boost of
the zero field nonlinear transverse voltage in arc-shaped bismuth stripes due
to an extrinsic geometric classical counterpart of the NLHE. This electrical
frequency doubling in curved geometries is then extended to optical second
harmonic generation in the terahertz (THz) spectral range. The strong nonlinear
electrodynamical responses of the surface states are further demonstrated by a
concomitant highly efficient THz third harmonic generation which we achieve in
a broad range of frequencies in Bi and Bi-based heterostructures. Combined with
the possibility of growth on CMOS-compatible and mechanically flexible
substrates, these results highlight the potential of Bi thin films for THz
(opto)electronic applications.
The achievement of valley-polarized electron currents is a cornerstone for
the realization of valleytronic devices. Here, we report on ballistic coherent
transport experiments where two opposite quantum point contacts (QPCs) are
defined by electrostatic gating in a bilayer graphene (BLG) channel. By
steering the ballistic currents with an out-of-plane magnetic field we observe
two current jets, a consequence of valley-dependent trigonal warping. Tuning
the BLG carrier density and number of QPC modes (m) with a gate voltage we find
that the two jets are present for m=1 and up to m=6, indicating the robustness
of the effect. Semiclassical simulations which account for size quantization
and trigonal warping of the Fermi surface quantitatively reproduce our data
without fitting parameters, confirming the origin of the signals. In addition,
our model shows that the ballistic currents collected for non-zero magnetic
fields are valley-polarized independently of m, but their polarization depends
on the magnetic field sign, envisioning such devices as ballistic current
sources with tuneable valley-polarization.
We propose an efficient approach for simultaneous prediction of thermal and
electronic transport properties in complex materials. Firstly, a highly
efficient machine-learned neuroevolution potential is trained using reference
data from quantum-mechanical density-functional theory calculations. This
trained potential is then applied in large-scale molecular dynamics
simulations, enabling the generation of realistic structures and accurate
characterization of thermal transport properties. In addition, molecular
dynamics simulations of atoms and linear-scaling quantum transport calculations
of electrons are coupled to account for the electron-phonon scattering and
other disorders that affect the charge carriers governing the electronic
transport properties. We demonstrate the usefulness of this unified approach by
studying thermoelectric transport properties of a graphene antidot lattice.
We have measured the rate of spontaneous current formation in ring-shaped
ensembles of fermionic $^6$Li atoms, following a thermal quench through the BCS
superfluid phase transition. For the fastest quenches, the mean square winding
number follows a scaling law with exponent $\sigma$ = 0.24(2), in line with
predictions of the Kibble-Zurek (KZ) model for mean-field BCS theory. We use a
hybrid quench protocol involving simultaneous evaporation and interaction
ramps, with a long system lifetime allowing characterization of a different
rate of spontaneous current formation in the slow-quench regime, where
finite-size effects are important. Comparing our observations to a quasi-1D
stochastic Ginzburg-Landau model, we find quantitative agreement for fast
quenches, but only qualitative agreement for slow quenches.
Multifunctional coatings are central for information, biomedical,
transportation and energy technologies. These coatings must possess
hard-to-attain properties and be scalable, adaptable, and sustainable, which
makes layer-by-layer assembly (LBL) of nanomaterials uniquely suitable for
these technologies. What remains largely unexplored is that LBL enables
computational methodologies for structural design of these composites.
Utilizing silver nanowires (NWs), we develop and validate a graph theoretical
(GT) description of their LBL composites. GT successfully describes the
multilayer structure with nonrandom disorder and enables simultaneous rapid
assessment of several properties of electrical conductivity, electromagnetic
transparency, and anisotropy. GT models for property assessment can be rapidly
validated due to (1) quasi-2D confinement of NWs and (2) accurate microscopy
data for stochastic organization of the NW networks. We finally show that
spray-assisted LBL offers direct translation of the GT-based design of
composite coatings to additive, scalable manufacturing of drone wings with
straightforward extensions to other technologies.
Broken symmetries and electronic topology are nicely manifested together in
the second order nonlinear optical responses from topologically nontrivial
materials. While second order nonlinear optical effects from the electric
dipole (ED) contribution have been extensively explored in polar Weyl
semimetals (WSMs) with broken spatial inversion (SI) symmetry, they are rarely
studied in centrosymmetric magnetic WSMs with broken time reversal (TR)
symmetry due to complete suppression of the ED contribution. Here, we report
experimental demonstration of optical second harmonic generation (SHG) in a
magnetic WSM Co$_{3}$Sn$_{2}$S$_{2}$ from the electric quadrupole (EQ)
contribution. By tracking the temperature dependence of the rotation anisotropy
(RA) of SHG, we capture two magnetic phase transitions, with both the SHG
intensity increasing and its RA pattern rotating at $T_{C,1}$=175K and
$T_{C,2}$=120K subsequently. The fitted critical exponents for the SHG
intensity and RA orientation near $T_{C,1}$ and $T_{C,2}$ suggest that the
magnetic phase at $T_{C,1}$ is a 3D Ising-type out-of-plane ferromagnetism
while the other at $T_{C,2}$ is a 3D XY-type all-in-all-out in-plane
antiferromagnetism. Our results show the success of detection and exploration
of EQ SHG in a centrosymmetric magnetic WSM, and hence open the pathway towards
the future investigation of its tie to the band topology.
Topological signals are dynamical variables not only defined on nodes but
also on links of a network that are gaining significant attention in non-linear
dynamics and topology and have important applications in brain dynamics. Here
we show that topological signals on nodes and links of a network can generate
dynamical patterns when coupled together. In particular, dynamical patterns
require at least three topological signals, here taken to be two node signals
and one link signal. In order to couple these signals, we formulate the 3-way
topological Dirac operator that generalizes previous definitions of the 2-way
and 4-way topological Dirac operators. We characterize the spectral properties
of the 3-way Dirac operator and we investigate the dynamical properties of the
resulting Turing and Dirac induced patterns. Here we emphasize the distinct
dynamical properties of the Dirac induced patterns which involve topological
signals only coupled by the 3-way topological Dirac operator in absence of the
Hodge-Laplacian coupling. While the observed Turing patterns generalize the
Turing patterns typically investigated on networks, the Dirac induced patterns
have no equivalence within the framework of node based Turing patterns. These
results open new scenarios in the study of Turing patterns with possible
application to neuroscience and more generally to the study of emergent
patterns in complex systems.
Chimera states are dynamical states where regions of synchronous trajectories
coexist with incoherent ones. A significant amount of research has been devoted
to study chimera states in systems of identical oscillators, non-locally
coupled through pairwise interactions. Nevertheless, there is an increasing
evidence, also supported by available data, that complex systems are composed
by multiple units experiencing many-body interactions, that can be modeled by
using higher-order structures beyond the paradigm of classic pairwise networks.
In this work we investigate whether phase chimera states appear in this
framework, by focusing on a novel topology solely involving many-body,
non-local and non-regular interactions, hereby named non-local d-hyperring,
being (d+1) the order of the interactions. We present the theory by using the
paradigmatic Stuart-Landau oscillators as node dynamics, and show that phase
chimera states emerge in a variety of structures and with different coupling
functions. For comparison, we show that, when higher-order interactions are
"flattened" to pairwise ones, the chimera behavior is weaker and more elusive.
Bloch wave functions of electrons have properties called quantum geometry,
which has recently attracted much attention as the origin of intriguing
physical phenomena. In this paper, we introduce the notion of the
quantum-geometric pair potentials (QGPP) based on the generalized band
representation and thereby clarify how the quantum geometry of electrons is
transferred to the Cooper pairs they form. QGPP quantifies the deviation of
multiband superconductors from an assembly of single-band superconductors and
has a direct connection to the quantum-geometric corrections to thermodynamic
coefficients. We also discuss their potential ability to emulate exotic pair
potentials and engineer intriguing superconducting phenomena including
topological superconductivity.
Several optical experiments have shown that in magnetic materials the
principal axes of response tensors can rotate in a magnetic field. Here we
offer a microscopic explanation of this effect, and propose a closely related
DC transport phenomenon -- an off-diagonal \emph{symmetric} conductivity linear
in a magnetic field, which we refer to as linear magneto-conductivity (LMC).
Although LMC has the same functional dependence on magnetic field as the Hall
effect, its origin is fundamentally different: LMC requires time-reversal
symmetry to be broken even before a magnetic field is applied, and is therefore
a sensitive probe of magnetism. We demonstrate LMC in three different ways: via
a tight-binding toy model, density functional theory calculations on MnPSe$_3$,
and a semiclassical calculation. The third approach additionally identifies two
distinct mechanisms yielding LMC: momentum-dependent band magnetization and
Berry curvature. Finally, we propose an experimental geometry suitable for
detecting LMC, and demonstrate its applicability using Landauer-B\"{u}ttiker
simulations. Our results emphasize the importance of measuring the full
conductivity tensor in magnetic materials, and introduce LMC as a new transport
probe of symmetry.
Half-Heusler systems host a plethora of different ground states, especially
with non-trivial topology. However, there is still a lack of spectroscopic
insight into the corresponding band inversion in this family. In this work, we
locally explore the half-Heuslers Y$T$Bi ($T =$ Pt and Pd) by means of scanning
tunneling microscopy/spectroscopy. From our analysis of the (120) surface
plane, we infer that the increase of the spin--orbit coupling upon going from
Pd to Pt is the main player in tuning the surface states from trivial to
topologically non-trivial. Our measurements unveil a ($2 \times 1$)
reconstruction of the (120) surface of both systems. Using density functional
theory calculations, we show that the observed different behavior of the local
density of states near the Fermi level in these two materials is directly
related to the presence of metallic surface states. Our work sheds new light on
a well known tunable family of materials and opens new routes to explore the
presence of topological states of matter in half-Heusler systems and its
microscopic observation.
Topological invariants are global properties of the ground-state wave
function, typically defined as winding numbers in reciprocal space. Over the
years, a number of topological markers in real space have been introduced,
allowing to map topological order in heterogeneous crystalline and disordered
systems. Notably, even if these formulations can be expressed in terms of
lattice-periodic quantities, they can actually be deployed in open boundary
conditions only, as in practice they require computing the position operator
$\mathbf{r}$ which is ill-defined in periodic boundary conditions. Here we
derive a local Chern marker for infinite two-dimensional systems with periodic
boundary conditions in the large supercell limit, where the electronic
structure is sampled with one single point in reciprocal space. We validate our
approach with tight-binding numerical simulations on the Haldane model,
including trivial/topological superlattices made of pristine and disordered
Chern insulators. The strategy introduced here is very general and could be
applied to other topological invariants and geometrical quantities in any
dimension.
We developed a theory describing elementary excitations in the Bose-Fermi
system induced by circularly polarized light in a two-dimensional (2D) gas of
charge carriers with different masses. In such a hybrid system, the Fermi
subsystem is a degenerate Fermi gas, whereas the Bose subsystem is a condensate
of the light-induced composite bosons consisting of two fermions (electrons or
holes) with different effective masses. The interaction of the single-particle
excitations and the collective excitations (plasmons) in the Fermi subsystem
with the Bogoliubov collective modes (bogolons) in the Bose subsystem is
analyzed. The renormalization and damping (lifetime) of the excitations are
calculated, and the possibility of their experimental observation is discussed.
The developed theory can be applied to describe 2D condensed-matter structures
containing charge carriers with different effective masses, including
transition metal dichalcogenide monolayers and semiconductor quantum wells.
Magic-angle twisted bilayer graphene is the best studied physical platform
featuring moire potential induced narrow bands with non-trivial topology and
strong electronic correlations. Despite their significance, the Chern
insulating states observed at a finite magnetic field -- and extrapolating to a
band filling, $s$, at zero field -- remain poorly understood. Unraveling their
nature is among the most important open problems in the province of moir\'e
materials. Here we present the first comprehensive study of interacting
electrons in finite magnetic field while varying the electron density, twist
angle and heterostrain. Within a panoply of correlated Chern phases emerging at
a range of twist angles, we uncover a unified description for the ubiquitous
sequence of states with the Chern number $t$ for $(s,t)=\pm (0,4),
\pm(1,3),\pm(2,2)$ and $\pm(3,1)$. We also find correlated Chern insulators at
unconventional sequences with $s+t\neq \pm 4$, as well as with fractional $s$,
and elucidate their nature.
We use the radial null energy condition to construct a monotonic $a$-function
for a certain type of non-relativistic holographic RG flows. We test our
$a$-function in three different geometries that feature a Boomerang RG flow,
characterized by a domain wall between two AdS spaces with the same AdS radius,
but with different (and sometimes directions dependent) speeds of light. We
find that the $a$-function monotonically decreases and goes to a constant in
the asymptotic regimes of the geometry. Using the holographic dictionary in
this asymptotic AdS spaces, we find that the $a$-function not only reads the
fixed point central charge but also the speed of light, suggesting what the
correct RG charge might be for non-relativistic RG flows.
One of the prime material candidates to host the axion insulator state is
EuIn$_{2}$As$_{2}$. First-principles calculations predicted the emergence of
this exotic topological phase based on the assumption of a collinear
antiferromagnetic structure. However, neutron scattering measurements revealed
a more intricate magnetic ground state, characterized by two coexisting
magnetic wavevectors, reached by successive thermal phase transitions. The
proposed high and low temperature phases were a spin helix and a state with
interpenetrating helical and antiferromagnetic order, termed a broken helix,
respectively. Despite its complexity, the broken helix still protects the axion
state because the product of time-reversal and a rotational symmetry is
preserved. Here we identify the magnetic structure associated with these two
phases using a multimodal approach that combines symmetry-sensitive optical
probes, scattering, and group theoretical analysis. We find that the higher
temperature phase hosts a nodal structure rather than a helix, characterized by
a variation of the magnetic moment amplitude from layer to layer, with the
moment vanishing entirely in every third Eu layer. The lower temperature
structure is similar to the broken helix, with one important difference: the
relative orientation of the magnetic structure and the lattice is not fixed,
resulting in an `unpinned broken helix'. As a result of the breaking of
rotational symmetry, the axion phase is not generically protected.
Nevertheless, we show that it can be restored if the magnetic structure is
tuned with externally-applied uniaxial strain. Finally, we present a spin
Hamiltonian that identifies the spin interactions needed to account for the
complex magnetic order in EuIn$_{2}$As$_{2}$. Our work highlights the
importance of the multimodal approach in determining the symmetry of complex
order-parameters.
Topological transitions in electronic band structures, resulting in van Hove
singularities in the density of states, can considerably affect various types
of orderings in quantum materials. Regular topological transitions (of neck
formation or collapse) lead to a logarithmic divergence of the electronic
density of states (DOS) as a function of energy in two-dimensions. In addition
to the regular van Hove singularities, there are higher order van Hove
singularities (HOVHS) with a power-law divergences in DOS. By employing
renormalization group (RG) techniques, we study the fate of a spin-density wave
phase formed by nested parts of the Fermi surface, when a HOVHS appears in
parallel. We find that the phase formation can be boosted by the presence of
the singularity, with the critical temperature increasing by orders of
magnitude. We discuss possible applications of our findings to a range of
quantum materials such as Sr$_3$Ru$_2$O$_7$, Sr$_2$RuO$_4$ and transition metal
dichalcogenides.
Landauer's principle gives a fundamental limit to the thermodynamic cost of
erasing information. Its saturation requires a reversible isothermal process,
and hence infinite time. We develop a finite-time version of Landauer's
principle for a bit encoded in the occupation of a single fermionic mode, which
can be strongly coupled to a reservoir. By solving the exact non-equilibrium
dynamics, we optimize erasure processes (taking both the fermion's energy and
system-bath coupling as control parameters) in the slow driving regime through
a geometric approach to thermodynamics. We find analytic expressions for the
thermodynamic metric and geodesic equations, which can be solved numerically.
Their solution yields optimal processes that allow us to characterize a
finite-time correction to Landauer's bound, fully taking into account
non-markovian and strong coupling effects.
Motivated by the thermal transport problem in the Kitaev spin liquids, we
consider a nearest-neighbor tight-binding model on the honeycomb lattice in the
presence of random uncorrelated $\pi$-fluxes. We employ different numerical
methods to study its transport properties near half-filling. The
zero-temperature DC conductivity away from the Dirac point is found to be
quadratic in Fermi momentum and inversely proportional to the flux density.
Localization due to the random $\pi$-fluxes is observed and the localization
length is extracted. Our results imply that, for realistic system size, the
thermal conductivity of a pure Kitaev spin liquid diverges as
$\kappa_\text{K}\sim T^3 e^{\Delta_v/k_BT}$ when $k_B T\ll \Delta_v$, and
suggest the possible occurrence of strong Majorana localization
$\kappa_\text{K}/T\ll k_B^2/2\pi\hbar$ when $k_B T\sim \Delta_v$, where
$\Delta_v$ is the vison gap.
Although SrNi$_2$P$_2$ adopts the common ThCr$_2$Si$_2$ structure for $T\geq
325$ K, being in an uncollapsed tetragonal (ucT) state, on cooling below 325 K
it adopts a one-third collapsed orthorhombic (tcO) phase where one out of every
three P-rows bond across the Sr layers. On the other hand, SrCo$_2$P$_2$ only
exhibits the uncollapsed ThCr$_2$Si$_2$ structure from room temperature down to
1.8 K. Neither SrNi$_2$P$_2$ nor SrCo$_2$P$_2$ manifest magnetic transitions
down to 50 mK and 2 K, respectively. In this work we report the effects of Co
substitution in Sr(Ni$_{1-x}$Co$_x$)$_2$P$_2$, which allows for tuning the
transition between the one-third collapsed and the uncollapsed structure. We
find a rapid decrease of the one-third collapsed structural transition
temperature with increasing Co fraction, until reaching full suppression for $x
\geq 0.1$. Substitution levels in the range $0.11\leq x\leq 0.58$ show no signs
of any transition down to 1.8 K in the magnetization or resistance measurements
in the range $1.8\ \text{K}\leq T\leq 300\ \text{K}$. However, different
magnetically ordered states emerge for $x\geq 0.65$, and disappear for $x\geq
0.99$, recovering the known paramagnetic properties of the parent compound
SrCo$_2$P$_2$. These results are summarized in a phase diagram, built upon the
characterization done on single crystals with different Co fraction. Both the
magnetic and structural properties are compared to other systems with
ThCr$_2$Si$_2$ structure that exhibit magnetic ordering and collapsed
tetragonal transitions. The magnetic ordering and moment formation are well
described by Takahashi's spin fluctuation theory of itinerant electron
magnetism.
We provide a universal tight bound on the energy gap of topological
insulators by exploring relationships between topology, quantum geometry, and
optical absorption. Applications of our theory to infrared absorption near
topological band inversion, magnetic circular dichorism in Chern insulators,
and topological gap in moir\'e materials are demonstrated.
Recent experiments have produced evidence for fractional quantum anomalous
Hall (FQAH) states at zero magnetic field in the semiconductor moir\'e
superlattice system $t$MoTe$_2$. Here we argue that a composite fermion
description, already a unifying framework for the phenomenology of 2d electron
gases at high magnetic fields, provides a similarly powerful perspective in
this new context. To this end, we present exact diagonalization evidence for
composite Fermi liquid states at zero magnetic field in $t$MoTe$_2$ at fillings
$n=\frac{1}{2}$ and $n=\frac{3}{4}$. We dub these non-Fermi liquid metals
anomalous composite Fermi liquids (ACFLs), and we argue that they play a
central organizing role in the FQAH phase diagram. We proceed to develop a long
wavelength theory for this ACFL state that offers concrete experimental
predictions upon doping the composite Fermi sea, including a Jain sequence of
FQAH states and a new type of commensurability oscillations originating from
the superlattice potential intrinsic to the system.
Topological defects are singularities in an ordered phase that can have a
profound effect on phase transitions and serve as a window into the order
parameter. In this work we use scanning tunneling microscopy to visualize the
role of topological defects in the novel magnetic field induced disappearance
of an intertwined charge density wave (CDW) in the heavy fermion
superconductor, UTe2. By simultaneously imaging the amplitude and phase of the
CDW order, we reveal pairs of topological defects with positive and negative
phase winding. The pairs are directly correlated with a zero CDW amplitude and
increase in number with increasing magnetic field. These observations can be
captured by a Ginzburg Landau model of a uniform superconductor coexisting with
a pair density wave. A magnetic field generates vortices of the superconducting
and pair density wave order which can create topological defects in the CDW and
induce the experimentally observed melting of the CDW at the upper critical
field. Our work reveals the important role of magnetic field generated
topological defects in the melting the CDW order parameter in UTe2 and provides
support for the existence of a parent pair density wave order on the surface of
UTe2.
In this work, we study the generalization of decohered average
symmetry-protected topological phases to open quantum systems with a
combination of subsystem symmetries and global symmetries. In particular, we
provide examples of two types of intrinsic average higher-order topological
phases with average subsystem symmetries. A classification scheme for these
phases based on generalized anomaly cancellation criteria of average symmetry
is also discussed.
We propose a scenario for superconductivity at strong electron-electron
attractive interaction, in the situation when the increase of interaction
strength promotes the nucleation of the local Cooper pairs and forms a state
with a spatially phase incoherent Cooper pair order parameter. We show that
this state can be characterized by a pseudogap and a scattering rate, which are
determined by the self-energy due to electron scattering on phase fluctuations.
At low temperatures, however, long-range correlations between the regions with
different phases become important and establish global phase coherence hence
superconductivity in the system. We develop a mean-field theory to describe a
phase transition between the preformed Cooper pair and superconducting states.
The superconducting transition temperature and the upper critical magnetic
field are shown to be enhanced in the strong coupling case. The mean-field
approach is justified by the small value of the Ginzburg-Levanyuk parameter.
This scenario of superconductivity applies not only to conductors with
parabolic bands but also to the flat-band systems in which flat and dispersive
bands coexist and responsible for the Cooper pairs formation as well as their
phase synchronization.
We consider quantum jump trajectories of Markovian open quantum systems
subject to stochastic in time resets of their state to an initial
configuration. The reset events provide a partitioning of quantum trajectories
into consecutive time intervals, defining sequences of random variables from
the values of a trajectory observable within each of the intervals. For
observables related to functions of the quantum state, we show that the
probability of certain orderings in the sequences obeys a universal law. This
law does not depend on the chosen observable and, in case of Poissonian reset
processes, not even on the details of the dynamics. When considering (discrete)
observables associated with the counting of quantum jumps, the probabilities in
general lose their universal character. Universality is only recovered in cases
when the probability of observing equal outcomes in a same sequence is
vanishingly small, which we can achieve in a weak reset rate limit. Our results
extend previous findings on classical stochastic processes [N.~R.~Smith et al.,
EPL {\bf 142}, 51002 (2023)] to the quantum domain and to state-dependent reset
processes, shedding light on relevant aspects for the emergence of universal
probability laws.
Heat control is a key issue in nano-electronics, where new efficient energy
transfer mechanisms are highly sought after. In this respect, there is indirect
evidence that high-mobility hexagonal boron nitride (hBN)-encapsulated graphene
exhibits hyperbolic out-of-plane radiative energy transfer when driven
out-of-equilibrium. Here we directly observe radiative energy transfer due to
the hyperbolic phonon polaritons modes of the hBN encapsulant in intrinsic
graphene devices under large bias, using mid-infrared spectroscopy and
pyrometry. By using different hBN crystals of varied crystalline quality, we
engineer the energy transfer efficiency, a key asset for compact thermal
management of electronic circuits.
Although topological phenomena attract growing interest not only in linear
systems but also in nonlinear systems, the bulk-edge correspondence under the
nonlinearity of eigenvalues has not been established so far. We address this
issue by introducing auxiliary eigenvalues. We reveal that the topological edge
states of auxiliary eigenstates are topologically inherited as physical edge
states when the nonlinearity is weak but finite (i.e., auxiliary eigenvalues
are monotonic as for the physical one). This result leads to the bulk-edge
correspondence with the nonlinearity of eigenvalues.

Date of feed: Wed, 25 Oct 2023 00:30:00 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) **Tunable room temperature nonlinear Hall effect from the surfaces of elementary bismuth thin films. (arXiv:2310.15225v1 [cond-mat.mes-hall])**

Pavlo Makushko, Sergey Kovalev, Yevhen Zabila, Igor Ilyakov, Alexey Ponomaryov, Atiqa Arshad, Gulloo Lal Prajapati, Thales V. A. G. de Oliveira, Jan-Christoph Deinert, Paul Chekhonin, Igor Veremchuk, Tobias Kosub, Yurii Skourski, Fabian Ganss, Denys Makarov, Carmine Ortix

**A ballistic electron source with magnetically-controlled valley polarization in bilayer graphene. (arXiv:2310.15293v1 [cond-mat.mes-hall])**

Josep Ingla-Aynés, Antonio L. R. Manesco, Talieh S. Ghiasi, Kenji Watanabe, Takashi Taniguchi, Herre S. J. van der Zant

**Combining linear-scaling quantum transport and machine-learning molecular dynamics to study thermal and electronic transports in complex materials. (arXiv:2310.15314v1 [cond-mat.mtrl-sci])**

Zheyong Fan, Yang Xiao, Yanzhou Wang, Penghua Ying, Shunda Chen, Haikuan Dong

**Quench-induced spontaneous currents in rings of ultracold fermionic atoms. (arXiv:2310.15348v1 [cond-mat.quant-gas])**

Daniel G. Allman, Parth Sabharwal, Kevin C. Wright

**Layer-by-Layer Assembled Nanowire Networks Enable Graph Theoretical Design of Multifunctional Coatings. (arXiv:2310.15369v1 [physics.app-ph])**

Wenbing Wu, Alain Kadar, Sang Hyun Lee, Bum Chul Park, Jeffery E. Raymond, Thomas K. Tsotsis, Carlos E. S. Cesnik, Sharon C. Glotzer, Valerie Goss, Nicholas A. Kotov

**Electric quadrupole second harmonic generation revealing dual magnetic orders in a magnetic Weyl semimetal. (arXiv:2310.15423v1 [cond-mat.mtrl-sci])**

Youngjun Ahn, Xiaoyu Guo, Rui Xue, Kejian Qu, Kai Sun, David Mandrus, Liuyan Zhao

**The three way Dirac operator and dynamical Turing and Dirac induced patterns on nodes and links. (arXiv:2310.15538v1 [nlin.PS])**

Riccardo Muolo, Timoteo Carletti, Ginestra Bianconi

**Phase chimera states on non-local hyperrings. (arXiv:2310.15540v1 [nlin.PS])**

Riccardo Muolo, Thierry Njougouo, Lucia Valentina Gambuzza, Timoteo Carletti, Mattia Frasca

**Quantum geometry encoded to pair potentials. (arXiv:2310.15558v1 [cond-mat.supr-con])**

Akito Daido, Taisei Kitamura, Youichi Yanase

**Linear magneto-conductivity as a DC probe of time-reversal symmetry breaking. (arXiv:2310.15631v1 [cond-mat.mes-hall])**

Veronika Sunko, Chunxiao Liu, Marc Vila, Ilyoun Na, Yuchen Tang, Vladyslav Kozii, Sinéad M. Griffin, Joel E. Moore, Joseph Orenstein

**Tuning the topological character of half-Heusler systems: A comparative study on Y$T$Bi ($T$ = Pd, Pt). (arXiv:2310.15708v1 [cond-mat.mtrl-sci])**

J. C. Souza, M. V. Ale Crivillero, H. Dawczak-Dębicki, Andrzej Ptok, P. G. Pagliuso, S. Wirth

**Local Chern Marker for Periodic Systems. (arXiv:2310.15783v1 [cond-mat.mes-hall])**

Nicolas Baù, Antimo Marrazzo

**Elementary excitations in the hybrid Bose-Fermi system induced by circularly polarized light in a two-dimensional gas of charge carriers with different masses. (arXiv:2310.15864v1 [cond-mat.mes-hall])**

V. M. Kovalev, M. V. Boev, O. V. Kibis

**Theory of correlated Chern insulators in twisted bilayer graphene. (arXiv:2310.15982v1 [cond-mat.mes-hall])**

Xiaoyu Wang, Oskar Vafek

**Holographic $a$-functions and Boomerang RG Flows. (arXiv:2310.15983v1 [hep-th])**

Elena Cáceres, Rodrigo Castillo Vásquez, Karl Landsteiner, Ignacio Salazar Landea

**Symmetry-breaking pathway towards the unpinned broken helix. (arXiv:2310.16018v1 [cond-mat.str-el])**

E. Donoway, T. V. Trevisan, A. Liebman - Peláez, R. P. Day, K. Yamakawa, Y. Sun, J. R. Soh, D. Prabhakaran, A. Boothroyd, R. M. Fernandes, J. G. Analytis, J. E. Moore, J. Orenstein, V. Sunko

**Fate of density waves in the presence of a higher order van Hove singularity. (arXiv:2205.08828v2 [cond-mat.str-el] UPDATED)**

Alkistis Zervou, Dmitriy V. Efremov, Joseph J. Betouras

**Finite-time Landauer principle beyond weak coupling. (arXiv:2211.02065v3 [quant-ph] UPDATED)**

Alberto Rolandi, Martí Perarnau-Llobet

**Transport in honeycomb lattice with random $\pi$-fluxes: implications for low-temperature thermal transport in the Kitaev spin liquids. (arXiv:2211.16719v4 [cond-mat.mes-hall] UPDATED)**

Zekun Zhuang

**Effects of Co substitution on the structural and magnetic properties of Sr(Ni$_{1-x}$Co$_x$)$_2$P$_2$. (arXiv:2305.01805v2 [cond-mat.str-el] UPDATED)**

Juan Schmidt, Guilherme Gorgen-Lesseux, Raquel A. Ribeiro, Sergey L. Bud'ko, Paul C. Canfield

**Fundamental bound on topological gap. (arXiv:2306.00078v3 [cond-mat.mes-hall] UPDATED)**

Yugo Onishi, Liang Fu

**Zero-field composite Fermi liquid in twisted semiconductor bilayers. (arXiv:2306.02513v2 [cond-mat.mes-hall] UPDATED)**

Hart Goldman, Aidan P. Reddy, Nisarga Paul, Liang Fu

**Visualizing the melting of the charge density wave in UTe2 by generation of pairs of topological defects with opposite winding. (arXiv:2306.09423v2 [cond-mat.supr-con] UPDATED)**

Anuva Aishwarya, Julian May-Mann, Avior Almoalem, Sheng Ran, Shanta R. Saha, Johnpierre Paglione, Nicholas P. Butch, Eduardo Fradkin, Vidya Madhavan

**Fractonic Higher-Order Topological Phases in Open Quantum Systems. (arXiv:2307.05474v2 [cond-mat.str-el] UPDATED)**

Jian-Hao Zhang, Ke Ding, Shuo Yang, Zhen Bi

**Superconductivity from incoherent Cooper pairs in strong-coupling regime. (arXiv:2308.04508v3 [cond-mat.supr-con] UPDATED)**

Alexander A. Zyuzin, A. Yu. Zyuzin

**Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes. (arXiv:2310.06981v2 [cond-mat.stat-mech] UPDATED)**

Federico Carollo, Igor Lesanovsky, Juan P. Garrahan

**Direct observation and control of near-field radiative energy transfer in a natural hyperbolic material. (arXiv:2310.08351v2 [cond-mat.mes-hall] UPDATED)**

L. Abou-Hamdan, A. Schmitt, R. Bretel, S. Rossetti, M. Tharrault, D. Mele, A. Pierret, M. Rosticher, T. Taniguchi, K. Watanabe, C. Maestre, C. Journet, B. Toury, V. Garnier, P. Steyer, J. H. Edgar, E. Janzen, J-M. Berroir, G. Fève, G. Ménard, B. Plaçais, C. Voisin, J-P. Hugonin, E. Bailly, B. Vest, J-J. Greffet, P. Bouchon, Y. De Wilde, E. Baudin

**Bulk-edge correspondence for nonlinear eigenvalue problems. (arXiv:2310.12577v2 [cond-mat.mes-hall] UPDATED)**

Takuma Isobe, Tsuneya Yoshida, Yasuhiro Hatsugai

Found 7 papers in prb The interference effect between the magnetic scattering and the charge scattering in resonant x-ray diffraction (RXD) leads to circular dichroism. The authors utilize this effect here to distinguish the antiferromagnetic (AFM) domain state in the noncollinear antiferromagnet TbB${}_{4}$, breaking both the space-inversion (P) and time-reversal (T) symmetries but preserving the combined PT symmetry. This result shows that circularly polarized RXD using the interference effect enables us to detect AFM order parameters and spatially resolve the domain state in PT-symmetric AFM materials. We study the crossed Andreev reflection and the nonlocal transport in the proximitized graphene/ superconductor/proximitized graphene junctions with the pseudospin staggered potential and the intrinsic spin-orbit coupling. The crossed Andreev reflection with the local Andreev reflection and the elas… Nontrivial topological materials are emerging as fascinating objects in condensed matter research due to their great potential in low-power and low-dissipation electronic applications. In this work, using first-principles calculations and a tight-binding method, we propose a promising candidate with… Common proposals for realizing topological superconductivity and Majorana zero modes in semiconductor-superconductor hybrids require large magnetic fields, which paradoxically suppress the superconducting gap of the parent superconductor. Although two-channel schemes have been proposed as a way to e… Zirconium pentatelluride $({\mathrm{ZrTe}}_{5})$, a system with a Dirac linear band across the Fermi level and anomalous transport features, has attracted considerable research interest for it is predicted to be located at the boundary between strong and weak topological insulators separated by a to… We study phase-controlled planar Josephson junctions comprising a two-dimensional electron gas with strong spin-orbit coupling and $d$-wave superconductors, which have an advantage of a high critical temperature. We show that a region between the two superconductors can be tuned into a topological s… Second-order topological insulators (SOTIs) support topological states beyond the usual bulk-boundary correspondence and provide important connections between quantum chemistry and topology. A hallmark of the two-dimensional (2D) SOTIs is the emergence of corner states, which usually arise from the …

Date of feed: Wed, 25 Oct 2023 03:17:01 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) **Resonant x-ray diffraction study using circularly polarized x rays on antiferromagnetic ${\mathrm{TbB}}_{4}$**

R. Misawa, K. Arakawa, T. Yoshioka, H. Ueda, F. Iga, K. Tamasaku, Y. Tanaka, and T. Kimura

Author(s): R. Misawa, K. Arakawa, T. Yoshioka, H. Ueda, F. Iga, K. Tamasaku, Y. Tanaka, and T. Kimura

[Phys. Rev. B 108, 134433] Published Tue Oct 24, 2023

**Perfect crossed Andreev reflection in the proximitized graphene/superconductor/proximitized graphene junctions**

Shu-Chang Zhao, Lu Gao, Qiang Cheng, and Qing-Feng Sun

Author(s): Shu-Chang Zhao, Lu Gao, Qiang Cheng, and Qing-Feng Sun

[Phys. Rev. B 108, 134511] Published Tue Oct 24, 2023

**Topological states of ${\mathrm{Sr}}_{3}\mathrm{PbO}$: From topological crystalline insulator phase in the bulk to quantum spin Hall insulator phase in the thin-film limit**

Hei Lam, Rui Peng, Ziyu Wang, Chunyu Wan, and Junwei Liu

Author(s): Hei Lam, Rui Peng, Ziyu Wang, Chunyu Wan, and Junwei Liu

[Phys. Rev. B 108, 155139] Published Tue Oct 24, 2023

**Realizing Majorana Kramers pairs in two-channel InAs-Al nanowires with highly misaligned electric fields**

Benjamin D. Woods and Mark Friesen

Author(s): Benjamin D. Woods and Mark Friesen

[Phys. Rev. B 108, 155142] Published Tue Oct 24, 2023

**Temperature-dependent collective excitations in the three-dimensional Dirac system ${\mathrm{ZrTe}}_{5}$**

Zijian Lin, Cuixiang Wang, Daqiang Chen, Sheng Meng, Youguo Shi, Jiandong Guo, and Xuetao Zhu

Author(s): Zijian Lin, Cuixiang Wang, Daqiang Chen, Sheng Meng, Youguo Shi, Jiandong Guo, and Xuetao Zhu

[Phys. Rev. B 108, 165146] Published Tue Oct 24, 2023

**Majorana bound states in a $d$-wave superconductor planar Josephson junction**

Hamed Vakili, Moaz Ali, Mohamed Elekhtiar, and Alexey A. Kovalev

Author(s): Hamed Vakili, Moaz Ali, Mohamed Elekhtiar, and Alexey A. Kovalev

[Phys. Rev. B 108, L140506] Published Tue Oct 24, 2023

**Tuning corner states in proximitized second-order topological insulators with bulk-boundary obstruction**

Yang Xue, Tong Zhou, Wei Xu, Bao Zhao, Igor Žutić, and Zhongqin Yang

Author(s): Yang Xue, Tong Zhou, Wei Xu, Bao Zhao, Igor Žutić, and Zhongqin Yang

[Phys. Rev. B 108, L161110] Published Tue Oct 24, 2023

Found 1 papers in prl Qubits built out of Majorana zero modes constitute the primary path toward topologically protected quantum computing. Simulating the braiding process of multiple Majorana zero modes corresponds to the quantum dynamics of a superconducting many-body system. It is crucial to study the Majorana dynamic…

Date of feed: Wed, 25 Oct 2023 03:16:59 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) **Many-Body Majorana Braiding without an Exponential Hilbert Space**

Eric Mascot, Themba Hodge, Dan Crawford, Jasmin Bedow, Dirk K. Morr, and Stephan Rachel

Author(s): Eric Mascot, Themba Hodge, Dan Crawford, Jasmin Bedow, Dirk K. Morr, and Stephan Rachel

[Phys. Rev. Lett. 131, 176601] Published Tue Oct 24, 2023

Found 1 papers in pr_res We consider a configuration of three stacked graphene monolayers with commensurate twist angles ${θ}_{12}/{θ}_{23}=p/q$, where $p$ and $q$ are coprime integers with $0<p<|q|$ and $q$ can be positive or negative. We study this system using the continuum model in the chiral limit when interlayer…

Date of feed: Wed, 25 Oct 2023 03:17:01 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) **Magic angle butterfly in twisted trilayer graphene**

Fedor K. Popov and Grigory Tarnopolsky

Author(s): Fedor K. Popov and Grigory Tarnopolsky

[Phys. Rev. Research 5, 043079] Published Tue Oct 24, 2023

Found 1 papers in nano-lett

Date of feed: Tue, 24 Oct 2023 13:08:27 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] Quantum Phase Transition in Magnetic Nanographenes on a Lead Superconductor**

Yu Liu, Can Li, Fu-Hua Xue, Wei Su, Ying Wang, Haili Huang, Hao Yang, Jiayi Chen, Dandan Guan, Yaoyi Li, Hao Zheng, Canhua Liu, Mingpu Qin, Xiaoqun Wang, Rui Wang, Deng-Yuan Li, Pei-Nian Liu, Shiyong Wang, and Jinfeng JiaNano LettersDOI: 10.1021/acs.nanolett.3c02208

Found 1 papers in acs-nano

Date of feed: Tue, 24 Oct 2023 13:04:42 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] Emerging Nontrivial Topology in Ultrathin Films of Rare-Earth Pnictides**

Dai Q. Ho, Ruiqi Hu, D. Quang To, Garnett W. Bryant, and Anderson JanottiACS NanoDOI: 10.1021/acsnano.3c03307

Found 2 papers in scipost **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) **Boundary states of Three Dimensional Topological Order and the Deconfined Quantum Critical Point, by Wenjie Ji, Nathanan Tantivasadakarn, Cenke Xu**

< author missing >

Submitted on 2023-10-24, refereeing deadline 2023-11-08.

**Topological semimetals with antiferromagnetic order in Hubbard model, by Garima Goyal, Dheeraj Kumar Singh**

< author missing >

Submitted on 2023-10-24, refereeing deadline 2023-11-07.