Found 49 papers in cond-mat We present the development of a versatile apparatus for a 6.2 eV laser-based
time and angle-resolved photoemission spectroscopy with micrometer spatial
resolution (time-resolved $\mu$-ARPES). With a combination of tunable spatial
resolution down to $\sim$11 $\mu$m, high energy resolution ($\sim$11 meV),
near-transform-limited temporal resolution ($\sim$280 fs), and tunable 1.55 eV
pump fluence up to $\sim$3 mJ/cm$^2$, this time-resolved $\mu$-ARPES system
enables the measurement of ultrafast electron dynamics in exfoliated and
inhomogeneous materials. We demonstrate the performance of our system by
correlating the spectral broadening of the topological surface state of
Bi$_2$Se$_3$ with the spatial dimension of the probe pulse, as well as
resolving the spatial inhomogeneity contribution to the observed spectral
broadening. Finally, after in-situ exfoliation, we performed time-resolved
$\mu$-ARPES on a $\sim$30 $\mu$m few-layer-thick flake of transition metal
dichalcogenide WTe$_2$, thus demonstrating the ability to access ultrafast
electron dynamics with momentum resolution on micro-exfoliated and twisted
materials.
We propose a frustration-free model for the Moore-Read quantum Hall state on
sufficiently thin cylinders with circumferences $\lesssim 7$ magnetic lengths.
While the Moore-Read Hamiltonian involves complicated long-range interactions
between triplets of electrons in a Landau level, our effective model is a
simpler one-dimensional chain of qubits with deformed Fredkin gates. We show
that the ground state of the Fredkin model has high overlap with the Moore-Read
wave function and accurately reproduces the latter's entanglement properties.
Moreover, we demonstrate that the model captures the dynamical response of the
Moore-Read state to a geometric quench, induced by suddenly changing the
anisotropy of the system. We elucidate the underlying mechanism of the quench
dynamics and show that it coincides with the linearized bimetric field theory.
The minimal model introduced here can be directly implemented as a first step
towards quantum simulation of the Moore-Read state, as we demonstrate by
deriving an efficient circuit approximation to the ground state and
implementing it on IBM quantum processor.
Flatbands in condensed-matter, atomic physics, and quantum optics stand as
the basis for several strongly correlated quantum many-body phenomena such as
Wigner crystallization, the fractional quantum Hall effect and Moir\'e-related
physics. Besides inspiring analogies among diverse physical fields, flatbands
are highly sought-after in photonics because they allow unconventional light
flows such as slow-light. Here, we realize room-temperature slow-light with
Frenkel polaritons excited across two strongly coupled cavities. We demonstrate
the formation of a tuneable flatband appearing in absence of a periodic
in-plane potential. Our simple photonic architecture enables the unique spatial
segregation of photons and excitons in different cavities and maintains a
balanced degree of mixing between them. This unveils a dynamical competition
between many-body scattering processes and the underlying polariton nature
which leads to an increased fluorescence lifetime. The polariton features are
further revealed under appropriate resonant pumping, where we observe
suppression of the flatband polariton fluorescence intensity.
The integration of 2D nanomaterials with silicon is expected to enrich the
applications of 2D functional nanomaterials and to pave the way for
next-generation, nanoscale optoelectronics with enhanced performances. Herein,
a strategy for rare earth element doping has been utilized for the synthesis of
2D WS$_2$:Er nanosheets to achieve up-conversion and down-conversion emission
ranging from visible to the near-infrared region. Moreover, the potential
integration of the synthesized 2D nanosheets in silicon platforms is
demonstrated by the realization of an infrared photodetector based on a
WS$_2$:Er/Si heterojunction. These devices operate at room temperature and show
a high photoresponsivity of ~39.8 mA/W (at 980 nm) and a detectivity of 2.79
$\times$ 10$^{10}$ cm Hz$^{1/2}$ W$^{-1}$. Moreover, the dark current and noise
power density are suppressed effectively by van der Waals assisted p-n
heterojunction. This work fundamentally contributes to establishing infrared
detection by rare element doping of 2D materials in heterojunctions with Si, at
the forefront of infrared 2D materials-based photonics.
Bernstein modes are formed as a result of non-local coupling of collective
excitations and cyclotron harmonics in magnetized plasma. In degenerate solid
state plasma they are typically associated with magnetoplasmons. A new type of
Bernstein modes arises in two-dimensional electron liquid at sufficiently
strong quasiparticle interaction. We consider Bernstein modes originating from
coupling between quasiparticle cyclotron harmonics and shear magnetosound
waves. The latter may be responsible for the giant peak in radio-frequency
photoresistance observed in high-quality GaAs quantum wells. Using Landau-Silin
kinetic equation with an arbitrary strength of the interparticle Landau
interaction, we trace the reconstruction of Bernstein mode spectrum in
high-quality 2D electron systems across the crossover between weakly
interacting degenerate electron gas and the correlated electron liquid.
Sensitivity of Bernstein modes to the strength of quasiparticle interaction
allows one to use them for spectroscopy of Landau interaction function in the
electron Fermi liquids.
We study the influence of quantizing perpendicular magnetic fields on the
ground state of a bilayer with electron and hole fluids separated by an opaque
tunnel barrier. In the absence of a field, the ground state at low carrier
densities is a condensate of s-wave excitons that has spontaneous interlayer
phase coherence. We find that a series of phase transitions emerge at strong
perpendicular fields between condensed states and incompressible incoherent
states with full electron and hole Landau levels. When the electron and hole
densities are unequal, condensation can occur in higher angular momentum
electron-hole pair states and, at weak fields, break rotational symmetry. We
explain how this physics is expressed in dual-gate phase diagrams, and predict
transport and capacitively-probed thermodynamic signatures that distinguish
different states.
We propose and investigate an extension of the Caspar-Klug symmetry
principles for viral capsid assembly to the programmable assembly of
size-controlled triply-periodic polyhedra, discrete variants of the Primitive,
Diamond, and Gyroid cubic minimal surfaces. Inspired by a recent class of
programmable DNA origami colloids, we demonstrate that the economy of design in
these crystalline assemblies -- in terms of the growth of the number of
distinct particle species required with the increased size-scale (e.g.
periodicity) -- is comparable to viral shells. We further test the role of
geometric specificity in these assemblies via dynamical assembly simulations,
which show that conditions for simultaneously efficient and high-fidelity
assembly require an intermediate degree of flexibility of local angles and
lengths in programmed assembly. Off-target misassembly occurs via incorporation
of a variant of disclination defects, generalized to the case of hyperbolic
crystals. The possibility of these topological defects is a direct consequence
of the very same symmetry principles that underlie the economical design,
exposing a basic tradeoff between design economy and fidelity of programmable,
size controlled assembly.
The Fe intercalated transition metal dichalcogenide (TMD), Fe$_{1/3}$NbS$_2$,
exhibits remarkable resistance switching properties and highly tunable spin
ordering phases due to magnetic defects. We conduct synchrotron X-ray
scattering measurements on both under-intercalated ($x$ = 0.32) and
over-intercalated ($x$ = 0.35) samples. We discover a new charge order phase in
the over-intercalated sample, where the excess Fe atoms lead to a zigzag
antiferromagnetic order. The agreement between the charge and magnetic ordering
temperatures, as well as their intensity relationship, suggests a strong
magnetoelastic coupling as the mechanism for the charge ordering. Our results
reveal the first example of a charge order phase among the intercalated TMD
family and demonstrate the ability to stabilize charge modulation by
introducing electronic correlations, where the charge order is absent in bulk
2H-NbS$_2$ compared to other pristine TMDs.
Many-body interactions play a crucial role in quantum topological systems,
being able to impact or alter the topological classifications of
non-interacting fermion systems. In open quantum systems, where interactions
with the environment cause dissipation and decoherence of the fermionic
dynamics, the absence of hermiticity in the subsystem Hamiltonian drastically
reduces the stability of the topological phases of the corresponding closed
systems. Here we investigate the non-perturbative effects induced by the
environment on the prototype Su-Schrieffer-Heeger chain coupled to local
harmonic oscillator baths through either intra-cell or inter-cell transfer
integrals. Despite the common view, this type of coupling, if suitably
engineered, can even induce a transition to topological phases. By using a
world-line Quantum Monte Carlo technique we determine the phase diagram of the
model proving that the bimodality of the probability distribution of the
polarization signals the emergence of the topological phase. We show that a
qualitative description can be obtained in terms of an approach based on the
Cluster Perturbation Theory providing, in particular, a non-Hermitian
Hamiltonian for the fermionic subsystem and insights on the dissipative
dynamics.
Band gap is known as an effective parameter for tuning the Lande $g$-factor
in semiconductors and can be manipulated in a wide range through the bowing
effect in ternary alloys. In this work, using the recently developed virtual
substrate technique, high-quality InAsSb alloys throughout the whole Sb
composition range are fabricated and a large $g$-factor of $g\approx -90$ at
the minimum band gap of $\sim 0.1$ eV, which is almost twice that in bulk InSb
is found. Further analysis to the zero gap limit reveals a possible gigantic
$g$-factor of $g\approx -200$ with a peculiar relativistic Zeeman effect that
disperses as the square root of magnetic field. Such a $g$-factor enhancement
toward the narrow gap limit cannot be quantitatively described by the
conventional Roth formula, as the orbital interaction effect between the nearly
triply degenerated bands becomes the dominant source for the Zeeman splitting.
These results may provide new insights into realizing large $g$-factors and
spin polarized states in semiconductors and topological materials.
Cell rearrangements are fundamental mechanisms driving large-scale
deformations of living tissues. In three-dimensional (3D) space-filling cell
aggregates, cells rearrange through local topological transitions of the
network of cell-cell interfaces, which is most conveniently described by the
vertex model. Surprisingly, these transitions are not yet mathematically
properly formulated due to a rather convoluted architecture of the conventional
vertex model. As a result, the vertex model is generally difficult to
implement, especially in its full 3D representation. Indeed, the few existing
implementations of the full 3D vertex model rely on highly customized and
complex software-engineering solutions, which cannot be transparently
delineated and are thus mostly non-reproducible. We propose a solution to this
outstanding problem by introducing a new formulation of the vertex model,
called Graph Vertex Model~(GVM). GVM is based on storing the topology of the
cell network into a knowledge graph. Its data structure, uniquely defined by a
metagraph, allows performing cell rearrangement events by simple graph
transformations, which are themselves represented by graphs. These graph
transformations are mathematically well formulated and consist of elementary
operations, such as deletions and creations of links between nodes of the
knowledge graph, which are straight-forward to implement. Significantly, in the
GVM's data representation, complex topological changes in 3D space-filling
polyhedral packings can be broken down into a composition of more fundamental
T1 transitions. Remarkably, when applied to a 2D system, these transformations
reduce to a single T1 transition. This finding unifies topological transitions
in 2D and 3D space-filling packings and suggests that the GVM's graph data
structure may be the most natural representation of these systems.
Coherent topologically close-packed (TCP) precipitate plates in magnesium
alloys are found beneficial to the strength and creep resistance of alloys. To
comprehensively screen these TCP plates in the three most common hcp alloys,
magnesium (Mg), titanium (Ti), and zirconium (Zr) alloys, we performed
high-throughput first-principles calculations under a three-step screening
strategy. Our results indicate that the hcp-to-TCP structural transformations
(that is, the formation of coherent TCP plates) are prone to occur in Mg
alloys, while hcp-Ti and Zr alloys tend to favor hcp-to-bcc structural
transformations rather than the formation of TCP plates. Furthermore, these
screened results are basically consistent with experimental observations,
supporting the reliability of these results. The insights gained contribute to
a deeper understanding of precipitation behavior in various hcp-based alloys at
the atomic level and serve as a basis for screening coherent precipitates of
technological importance in other metallic systems.
Niobium halides, Nb3X8 (X = Cl,Br,I), which are predicted two-dimensional
magnets, have recently gotten attention due to their breathing kagome geometry.
Here, we have studied the electronic structure of Nb3Br8 by using
angle-resolved photoemission spectroscopy (ARPES) and first-principles
calculations. ARPES results depict the presence of multiple flat and weakly
dispersing bands. These bands are well explained by the theoretical
calculations, which show they have Nb d character indicating their origination
from the Nb atoms forming the breathing kagome plane. This van der Waals
material can be easily thinned down via mechanical exfoliation to the ultrathin
limit and such ultrathin samples are stable as depicted from the time-dependent
Raman spectroscopy measurements at room temperature. These results demonstrate
that Nb3Br8 is an excellent material not only for studying breathing kagome
induced flat band physics and its connection with magnetism, but also for
heterostructure fabrication for application purposes.
The key obstacle to the realization of a scalable quantum computer is
overcoming environmental and control errors. Topological quantum computation
has attracted great attention because it has emerged as one of the most
promising approaches to solving these problems. Various theoretical schemes for
building topological quantum computation have been proposed. However,
experimental implementation has always been a great challenge because it has
proved to be extremely difficult to create and manipulate topological qubits in
real systems. Therefore, topological quantum computation has not been realized
in experiments yet. Here, we report the first experimental realization of
topological quantum computation with electric circuits. Based on our proposed
new scheme with circuits, Majorana-like edge states are not only observed
experimentally, but also T junctions are constructed for the braiding process.
Furthermore, we demonstrate the feasibility of topological quantum computing
through a set of one- and two-qubit unitary operations. Finally, our
implementation of Grover's search algorithm demonstrates that topological
quantum computation is ideally suited for such tasks.
Two-dimensional van der Waals (vdW) magnetic materials hold promise for the
development of high-density, energy-efficient spintronic devices for memory and
computation. Recent breakthroughs in material discoveries and spin-orbit torque
(SOT) control of vdW ferromagnets have opened a path for integration of vdW
magnets in commercial spintronic devices. However, a solution for field-free
electric control of perpendicular magnetic anisotropy (PMA) vdW magnets at room
temperatures, essential for building compact and thermally stable spintronic
devices, is still missing. Here, we report the first demonstration of
field-free deterministic and non-volatile switching of a PMA vdW ferromagnet,
Fe$_3$GaTe$_2$ above room temperature (up to 320 K). We use the unconventional
out-of-plane anti-damping torque from an adjacent WTe$_2$ layer to enable such
switching with a low current density of $2.23 \times 10^6$ A/cm$^2$. This study
exemplifies the efficacy of low-symmetry vdW materials for spin-orbit torque
control of vdW ferromagnets and provides an all-vdW solution for the next
generation of scalable and energy-efficient spintronic devices.
One-dimensional graphene superlattice subjected to strong Kronig-Penney (KP)
potential is promising for achieving electron lensing effect, while previous
studies utilizing the modulated dielectric gates can only yield a moderate,
spatially dispersed potential profile. Here, we realize high KP potential
modulation of graphene via nanoscale ferroelectric domain gating. Graphene
transistors are fabricated on PbZr$_{0.2}$Ti$_{0.8}$O$_{3}$ back-gates
patterned with periodic, 100-200 nm wide stripe domains. Due to band
reconstruction, the h-BN top-gating induces satellite Dirac points in samples
with current along the superlattice vector $\hat{s}$, a feature absent in
samples with current perpendicular to $\hat{s}$. The satellite Dirac point
position scales with the superlattice period ($L$) as $\propto L^{\beta}$, with
$\beta = -1.18 \pm 0.06$. These results can be well explained by the high KP
potential scenario, with the Fermi velocity perpendicular to $\hat{s}$ quenched
to about 1% of that for pristine graphene. Our study presents a promising
material platform for realizing electron supercollimation and investigating
flat band phenomena.
Collective biological systems display power laws for macroscopic quantities
and are fertile probing grounds for statistical physics. Besides power laws,
natural insect swarms present strong scale-free correlations, suggesting
closeness to phase transitions. Swarms exhibit $imperfect$ dynamic scaling:
their dynamical correlation functions collapse into single curves when written
as functions of the scaled time $t\xi^{-z}$ ($\xi$: correlation length, $z$:
dynamic exponent), but only for short times. Triggered by markers, natural
swarms are not invariant under space translations. Measured static and dynamic
critical exponents differ from those of equilibrium and many nonequilibrium
phase transitions. Here, we show that the recently discovered scale-free-chaos
phase transition of the harmonically confined Vicsek model has a novel extended
critical region for finitely many insects. Unlike results of other theoretical
approaches, our numerical simulations of the critical region reproduce the
previously described features of natural swarms and yield static and dynamic
critical exponents that agree with observations.
Turbulent flows exhibit intriguing energy transfers. In this paper, we
compute the renormalized viscosities, mode-to-mode energy transfers, energy
fluxes, and shell-to-shell energy transfers for the two-dimensional (2D) and
three-dimensional (3D) hydrodynamic turbulence (HDT) using field-theoretic
methods. We employ Craya-Herring basis that provides separate renormalized
viscosities and energy transfers for its two components. In addition,
Craya-Herring basis eliminates complex tensor algebra and simplifies the
calculations considerably. In the $k^{-5/3}$ spectral regime of 2D HDT, the
energy transfers between neighbouring (local) wavenumbers are forward, but they
are backwards for distant (nonlocal) wavenumbers. The individual transfers
between the distant wavenumber shells are small, but their cumulative sum is
significant and it overcomes the forward local transfer to yield a constant
inverse energy cascade.
For 3D HDT, the mode-to-mode and shell-to-shell energy transfers reveal
forward energy transfers for both local and nonlocal wavenumbers. More
importantly, using scale-by-scale energy transfers we show that the cumulative
nonlocal and local energy transfers are of the same order, which is contrary to
the assumption of local energy transfers in turbulence. For 3D HDT, the
renormalized viscosity, $\nu_2(k)$, computed by us and other authors are in
general agreement, and it varies as $k^{-4/3}$. For 2D HDT, our the
renormalized viscosity, $\nu_1(k)>0$, but $\nu_1(k)$ reported in literature
shows significant variations including a negative $\nu_1(k)$. In this paper, we
argue that the inconsistencies in $\nu_1(k)$ indicate inadequacy of
renormalization group analysis that takes into account only local interactions
and excludes nonlocal ones. In 2D HDT, the opposing nature of local and
nonlocal energy transfers amplifies the error in $\nu_1(k)$.
Circuit quantum electrodynamics (QED) has emerged as a promising platform for
implementing quantum computation and simulation. Typically, junctions in these
systems are of a sufficiently small size, such that only the lowest plasma
oscillation is relevant. The interplay between the Josephson effect and
charging energy renders this mode nonlinear, forming the basis of a qubit. In
this work, we introduce a novel QED architecture based on extended Josephson
Junctions (JJs), which possess a non-negligible spatial extent. We present a
comprehensive microscopic analysis and demonstrate that each extended junction
can host multiple nonlinear plasmon modes, effectively functioning as a
multi-qubit interacting system, in contrast to conventional JJs. Furthermore,
the phase modes exhibit distinct spatial profiles, enabling individual
addressing through frequency-momentum selective coupling to photons. Our
platform has potential applications in quantum computation, specifically in
implementing single- and two-qubit gates within a single junction. We also
investigate a setup comprising several driven extended junctions interacting
via a multimode electromagnetic waveguide. This configuration serves as a
powerful platform for simulating the generalized Bose-Hubbard model, as the
photon-mediated coupling between junctions can create a lattice in both real
and synthetic dimensions. This allows for the exploration of novel quantum
phenomena, such as topological phases of interacting many-body systems.
In this study, the optical response to a terahertz pulse was investigated in
the transition metal chalcogenide Ta$_2$NiSe$_5$, a candidate excitonic
insulator. First, by irradiating a terahertz pulse with a relatively weak
electric field (0.3 MV/cm), the spectral changes in reflectivity near the
absorption edge due to third-order optical nonlinearity were measured and the
absorption peak characteristic of the excitonic phase just below the interband
transition was identified. Next, by irradiating a strong terahertz pulse with a
strong electric field of 1.65 MV/cm, the absorption of the excitonic phase was
found to be reduced, and a Drude-like response appeared in the mid-infrared
region. These responses can be interpreted as carrier generation by exciton
dissociation induced by the electric field, resulting in the partial melting of
the excitonic phase and metallization. The presence of a distinct threshold
electric field for carrier generation indicates exciton dissociation via
quantum-tunnelling processes. The spectral change due to metallization by the
electric field is significantly different from that due to the strong optical
excitation across the gap, which can be explained by the different melting
mechanisms of the excitonic phase in the two types of excitations.
The asymmetric properties of Janus two-dimensional materials commonly depend
on chemical effects, such as different atoms, elements, material types, etc.
Herein, based on carbon gene recombination strategy, we identify an intrinsic
non-chemical Janus configuration in a novel purely sp$^2$ hybridized carbon
monolayer, named as Janus-graphene. With the carbon gene of tetragonal,
hexagonal, and octagonal rings, the spontaneous unilateral growth of carbon
atoms drives the non-chemical Janus configuration in Janus-graphene, which is
totally different from the chemical effect in common Janus materials such as
MoSSe. A structure-independent half-auxetic behavior is mapped in
Janus-graphene that the structure maintains expansion whether stretched or
compressed, which lies in the key role of $p_z$ orbital. The unprecedented
half-auxeticity in Janus-graphene extends intrinsic auxeticity into pure sp$^2$
hybrid carbon configurations. With the unique half-auxeticity emerged in the
non-chemical Janus configuration, Janus-graphene enriches the functional carbon
family as a promising candidate for micro/nanoelectronic device applications.
We report an example that demonstrates the clear interdependence between
surface-supported reactions and molecular adsorption configurations. Two
biphenyl-based molecules with two and four bromine substituents, i.e.
2,2-dibromo-biphenyl (DBBP) and 2,2,6,6-tetrabromo-1,1-biphenyl (TBBP), show
completely different reaction pathways on a Ag(111) surface, leading to the
selective formation of dibenzo[e,l]pyrene and biphenylene dimer, respectively.
By combining low-temperature scanning tunneling microscopy, synchrotron
radiation photoemission spectroscopy, and density functional theory
calculations, we unravel the underlying reaction mechanism. After
debromination, a bi-radical biphenyl can be stabilized by surface Ag adatoms,
while a four-radical biphenyl undergoes spontaneous intramolecular annulation
due to its extreme instability on Ag(111). Such different chemisorption-induced
precursor states between DBBP and TBBP consequently lead to different reaction
pathways after further annealing. In addition, using bond-resolving scanning
tunneling microscopy and scanning tunneling spectroscopy, we determine the bond
length alternation of biphenylene dimer product with atomic precision, which
contains four-, six-, and eight-membered rings. The four-membered ring units
turn out to be radialene structures.
KZnBi was discovered recently as a new three-dimensional (3D) Dirac semimetal
with a pair of bulk Dirac fermions in contrast to the $\mathbb{Z}_2$ trivial
insulator reported earlier. In order to address this discrepancy, we have
performed electronic structure and topological state analysis of KZnBi using
the local, semilocal, and hybrid exchange-correlation (XC) functionals within
the density functional theory framework. We find that various XC functionals,
including the SCAN meta-GGA and hybrid functionals with 25$\%$ Hartree-Fock
(HF) exchange, resolve a topological nonsymmorphic insulator state with the
glide-mirror protected hourglass surface Dirac fermions. By carefully tuning
the modified Becke-Jhonson (mBJ) potential parameters, we recover the correct
orbital ordering and Dirac semimetal state of KZnBi. We further show that
increasing the default HF exchange in hybrid functionals ($> 40\%$) can also
capture the desired Dirac semimetal state with the correct orbital ordering of
KZnBi. The calculated energy dispersion and carrier velocities of Dirac states
are found to be in excellent agreement with the available experimental results.
Our results demonstrate that KZnBi is a unique topological material where large
electron correlations are crucial to realize the Dirac semimetal state.
Non-Hermitian topological phenomena have gained much interest among
physicists in recent years. In this paper, we expound on the physics of
dissipatively coupled Su-Schrieffer-Heeger (SSH) lattices, specifically in
systems with bosonic and electrical constituents. In the context of electrical
circuits, we demonstrate that a series of resistively coupled LCR circuits
mimics the topology of a dissipatively coupled SSH model. In addition, we
foreground a scheme to construct dissipatively coupled SSH lattices involving a
set of non-interacting bosonic oscillators weakly coupled to engineered
reservoirs of modes possessing substantially small lifetimes when compared to
other system timescales. Further, by activating the coherent coupling between
bosonic oscillators, we elucidate the emergence of non-reciprocal dissipative
coupling which can be controlled by the phase of the coherent interaction
strength precipitating in phase-dependent topological transitions and skin
effect. Our analyses are generic, apropos of a large class of systems
involving, for instance, optical and microwave settings, while the circuit
implementation represents the most straightforward of them.
Violation of the Wiedemann-Franz (WF) law in a 2D topological insulator due
to Majorana bound states (MBS) is studied via the Lorenz ratio in the
single-particle picture. We study the scaling of the Lorenz ratio in the
presence and absence of MBS with inelastic scattering modeled using a
B\"uttiker voltage-temperature probe. We compare our results with that seen in
a quantum dot junction in the Luttinger liquid picture operating in the
topological Kondo regime. We find that the scaling of the Lorenz ratio in our
setup corresponds to the scaling in the Luttinger-liquid setup only when both
phase and momentum relaxation occur, but not when only phase relaxation occurs.
This suggests that the interplay between the presence of Majorana bound states
and the type of inelastic scattering process, can have a significant impact on
the violation of the Wiedemann-Franz law in 2D topological insulators.
Weyl points (WP) are robust spectral degeneracies, which can not be split by
small perturbations, as they are protected by their non-zero topological
charge. For larger perturbations, WPs can disappear via pairwise annihilation,
where two oppositely charged WPs merge, and the resulting neutral degeneracy
disappears. The neutral degeneracy is unstable, meaning that it requires the
fine-tuning of the perturbation. Fine-tuning of more than one parameter can
lead to more exotic WP mergers. In this work, we reveal and analyze a
fundamental connection of the WP mergers and singularity theory: phase boundary
points of Weyl phase diagrams, i.e., control parameter values where Weyl point
mergers happen, can be classified according to singularity classes of maps
between manifolds of equal dimension. We demonstrate this connection on a
Weyl--Josephson circuit where the merger of 4 WPs draw a swallowtail
singularity, and in a random BdG Hamiltonian which reveal a rich pattern of
fold lines and cusp points. Our results predict universal geometrical features
of Weyl phase diagrams, and generalize naturally to creation and annihilation
of Weyl points in electronic (phononic, magnonic, photonic, etc) band-structure
models, where Weyl phase transitions can be triggered by control parameters
such as mechanical strain.
A spin system is studied, with simultaneous permutation-symmetric Potts and
spin-rotation-symmetric clock interactions, in spatial dimensions d=2 and 3.
The global phase diagram is calculated from the renormalizaton-group solution
with the recently improved (spontaneous first-order detecting) Migdal-Kadanoff
approximation or, equivalently, with hierarchical lattices with the inclusion
of effective vacancies. Five different ordered phases are found: conventionally
ordered ferromagnetic, quadrupolar, antiferromagnetic phases and algebraically
ordered antiferromagnetic, antiquadrupolar phases. These five different ordered
phases and the disordered phase are mutually bounded by first- and second-order
phase transitions, themselves delimited by multicritical points: inverted
bicritical, zero-temperature bicritical, tricritical, second-order bifurcation,
and zero-temperature highly degenerate multicritical points. One rich phase
diagram topology exhibits all of these phenomena.
A unique co-existence of extremely large magnetoresistance (XMR) and
topological characteristics in non-magnetic rare-earth monopnictides
stimulating intensive research on these materials. Yttrium monobismuthide (YBi)
has been reported to exhibit XMR up to 105% but its Topological properties
still need clarification. Here we use the hybrid density functional theory to
probe the structural, electronic and topological properties of YBi in detail.
We observe that YBi is topologically trivial semimetal at ambient pressure
which is in accordance with reported experimental results. The topological
phase transitions i.e., trivial to non-trivial are obtained with volumetric
pressure of 6.5 GPa and 3% of epitaxial strain. This topological phase
transitions are well within the structural phase transition of YBi (24.5 GPa).
The topological non-trivial state is characterized by band inversions among Y-d
band and Bi-p band near {\Gamma}- and X-point in the Brillouin zone. This is
further verified with the help of surface band structure along (001) plane. The
Z2 topological invariants are calculated with the help of product of parities
and evolution of Wannier charge centers. The occurrence of non-trivial phase in
YBi with a relatively small epitaxial strain, which a thin film geometry can
naturally has, might make it an ideal candidate to probe inter-relationship
between XMR and non-trivial topology.
Moir\'e materials are artificial crystals formed at van der Waals
heterojunctions that have emerged as a highly tunable platform to realize much
of the rich quantum physics of electrons in atomic scale solids, also providing
opportunities to discover new quantum phases of matter. Here we use finite-size
exact diagonalization methods to explore the physics of single-band itinerant
electron ferromagnetism in semiconductor moir\'e materials. We predict where
ferromagnetism is likely to occur in triangular-lattice moir\'e systems, and
where it is likely to yield the highest Curie temperatures.
The random-magnetic-field classical Heisenberg model is solved in spatial
dimensions d>=2 using the recently developed Fourier-Legendre
renormalization-group theory for $4\pi$ steradians continuously orientable
spins, with renormalization-group flows of 12,500 variables. The
random-magnetic-field Heisenberg model is exactly solved in 10 hierarchical
models, for d=2,2.26,2.46,2.58,2.63,2.77,2.89,3. For non-zero random fields,
ferromagnetic order is seen for d>2. This ordering shows, at d=3, reentrance as
a function of temperature.
Intrinsic magnetic topological insulators have emerged as a promising
platform to study the interplay between topological surface states and
ferromagnetism. This unique interplay can give rise to a variety of exotic
quantum phenomena, including the quantum anomalous Hall effect and axion
insulating states. Here, utilizing molecular beam epitaxy (MBE), we present a
comprehensive study of the growth of high-quality MnBi2Te4 thin films on Si
(111), epitaxial graphene, and highly ordered pyrolytic graphite substrates. By
combining a suite of in-situ characterization techniques, we obtain critical
insights into the atomic-level control of MnBi2Te4 epitaxial growth. First, we
extract the free energy landscape for the epitaxial relationship as a function
of the in-plane angular distribution. Then, by employing an optimized
layer-by-layer growth, we determine the chemical potential and Dirac point of
the thin film at different thicknesses. Overall, these results establish a
foundation for understanding the growth dynamics of MnBi2Te4 and pave the way
for the future applications of MBE in emerging topological quantum materials.
Three-dimensional topological semimetals exhibit linear energy band crossing
points that act as monopoles of Berry curvature. Here, an alternative class of
semimetals is introduced, featuring linear $N$-fold crossing points each of
which acts as a source of a \emph{Berry dipole}. We construct continuum and
lattice models for such \emph{massless multifold Hopf semimetals (MMHSs)} with
$N=3,4,5$ bands and study nontrivial effects of a Berry dipole crossing: (i) A
Landau level spectrum that is strongly tunable by the orientation of the
magnetic field relative to the dipole axis. (ii) An anomalous Hall conductivity
that is an odd function of the Fermi level. (iii) Weak-field dissipative
magnetoconductivities that resemble the chiral anomaly, chiral magnetic and
magnetochiral effects familiar from a pair of coupled Weyl nodes, but that are
even functions of the Fermi level. By gapping out MMHSs, multiband Hopf
insulators with Hopf numbers as high as $\mathcal{N}_\text{Hopf}=10$ are
obtained, providing a fertile playground to explore delicate topology.
The dynamics of solitons driven in a nonlinear Thouless pump and its
connection with the system's topology were recently explored for both weak and
strong nonlinear strength. This work uncovers the fate of nonlinear Thouless
pumping in the regime of intermediate nonlinearity, thus establishing a
fascinating crossover from the observation of nonzero and quantized pumping at
weak nonlinearity to zero pumping at strong nonlinearity. We identify the
presence of critical nonlinearity strength at which quantized pumping of
solitons breaks down regardless of the protocol time scale. Such an obstruction
to pumping quantization is attributed to the presence of loop structures of
nonlinear topological bands. Our results not only unveil a missing piece of
physics in nonlinear Thouless pumping, but also provide a means to detect loop
structures of nonlinear systems investigated in real space.
Magnetic skyrmions, topologically-stabilized spin textures that emerge in
magnetic systems, have garnered considerable interest due to a variety of
electromagnetic responses that are governed by the topology. The topology that
creates a microscopic gyrotropic force also causes detrimental effects, such as
the skyrmion Hall effect, which is a well-studied phenomenon highlighting the
influence of topology on the deterministic dynamics and drift motion.
Furthermore, the gyrotropic force is anticipated to have a substantial impact
on stochastic diffusive motion; however, the predicted repercussions have yet
to be demonstrated, even qualitatively. Here we demonstrate enhanced
thermally-activated diffusive motion of skyrmions in a specifically designed
synthetic antiferromagnet. Suppressing the effective gyrotropic force by tuning
the angular momentum compensation leads to a more than 10 times enhanced
diffusion coefficient compared to that of ferromagnetic skyrmions.
Consequently, our findings not only demonstrate the gyro-force dependence of
the diffusion coefficient but also enable ultimately energy-efficient
unconventional stochastic computing.
We propose bi-critical and tri-critical theories between chiral spin liquid
(CSL), topological superconductor (SC) and charge density wave (CDW) ordered
Chern insulator with Chern number $C=2$ on square, triangular and kagome
lattices. The three CDW order parameters form a manifold of $S^2$ or $S^1$
depending on whether there is easy-plane anisotropy. The skyrmion defect of the
CDW order carries physical charge $2e$ and its condensation leads to a
topological superconductor. The CDW-SC transitions are in the same universality
classes as the celebrated deconfined quantum critical points (DQCP) between
Neel order and valence bond solid order on square lattice. Both SC and CDW
order can be accessed from the CSL phase through a continuous phase transition.
At the CSL-SC transition, there is still CDW order fluctuations although CDW is
absent in both sides. We propose three different theories for the CSL-SC
transition (and CSL to easy-plane CDW transition): a $U(1)$ theory with two
bosons, a $U(1)$ theory with two Dirac fermions, and an $SU(2)$ theory with two
bosons. Our construction offers a derivation of the duality between these three
theories as well as a promising physical realization. The $SU(2)$ theory offers
a unified framework for a series of fixed points with explicit $SO(5), O(4)$ or
$SO(3)\times O(2)$ symmetry. There is also a transparent duality transformation
mapping SC order to easy-plane CDW order. The CSL-SC-CDW tri-critical points
are invariant under this duality mapping and have an enlarged $SO(5)$ or $O(4)$
symmetry. The DQCPs between CDW and SC inherit the enlarged symmetry, emergent
anomaly, and self-duality from the tri-critical point. Our analysis unifies the
well-studied DQCP between symmetry breaking phases into a larger framework
where they are proximate to a topologically ordered phase.
Understanding the interplay between charge, nematic, and structural ordering
tendencies in cuprate superconductors is critical to unraveling their complex
phase diagram. Using pump-probe time-resolved resonant x-ray scattering on the
(0 0 1) Bragg peak at the Cu $L_3$ and O $K$ resonances, we investigate
non-equilibrium dynamics of $Q_a = Q_b = 0$ nematic order and its association
with both charge density wave (CDW) order and lattice dynamics in
La$_{1.65}$Eu$_{0.2}$Sr$_{0.15}$CuO$_4$. The orbital selectivity of the
resonant x-ray scattering cross-section allows nematicity dynamics associated
with the planar O 2$p$ and Cu 3$d$ states to be distinguished from the response
of anisotropic lattice distortions. A direct time-domain comparison of CDW
translational-symmetry breaking and nematic rotational-symmetry breaking
reveals that these broken symmetries remain closely linked in the photoexcited
state, consistent with the stability of CDW topological defects in the
investigated pump fluence regime.
The universal properties of (2 + 1)D topological phases of matter enriched by
a symmetry group G are described by G-crossed extensions of unitary modular
tensor categories (UMTCs). While the fusion and braiding properties of
quasiparticles associated with the topological order are described by a UMTC,
the G-crossed extensions further capture the properties of the symmetry action,
fractionalization, and defects arising from the interplay of the symmetry with
the topological order. We describe the relation between the G-crossed UMTC and
the topological state spaces on general surfaces that may include symmetry
defect branch lines and boundaries that carry topological charge. We define
operators in terms of the G-crossed UMTC data that represent the mapping class
transformations for such states on a torus with one boundary, and show that
these operators provide projective representations of the mapping class groups.
This allows us to represent the mapping class group on general surfaces and
ensures a consistent description of the corresponding symmetry-enriched
topological phases on general surfaces. Our analysis also enables us to prove
that a faithful G-crossed extension of a UMTC is necessarily G-crossed modular.
Unveiling nonequilibrium dynamics of solitonic and topological defect
structures in a multidimensional nonlinear medium is a current frontier across
diverse fields. One of the quintessential objects is a ring dark soliton (RDS),
whose dynamics are expected to display remarkable interplay between symmetry
and self-patterned topological defect formation from a transverse (snake)
instability, but it has thus far evaded full experimental observations. Here,
we report an experimental realization of RDS generation in a two-dimensional
atomic superfluid trapped in a circular box. By quenching the confining box
potential, we observe an RDS emitted from the edge and its peculiar signature
in the radial motion. As an RDS evolves, we observe transverse modulations at
discrete azimuthal angles, which clearly result in a patterned formation of a
circular vortex dipole array. Through collisions of the vortex dipoles with the
box trap, we observe vortex unbinding, vortex pinning to the edge, and emission
of rarefaction pulses. Our box-quench protocol opens a new way to study
multidimensional dark solitons, structured formation of topological defects,
and potentially the dynamics of ordered quantum vortex matter.
The condensed-matter realization of chiral anomaly has attracted tremendous
interest in exploring unexpected phenomena of quantum field theory. Here, we
show that one-dimensional (1D) chiral anomaly (i.e., 1D nonconservational
chiral current under a background electromagnetic field) can be realized in a
generalized Su-Schrieffer-Heeger model where a single gapless Dirac cone
occurs. Based on the topological Thouless pump and anomalous dynamics of chiral
displacement, we elucidate that such a system possesses the half-integer
quantization of winding number. Moreover, we investigate the evolution of 1D
chiral anomaly with respect to two typical types of disorder, i.e., on-site
disorder and bond disorder. The results show that the on-site disorder tends to
smear the gapless Dirac cone. However, we propose a strategy to stabilize the
half-integer quantization, facilitating its experimental detection.
Furthermore, we demonstrate that the bond disorder causes a unique crossover
with disorder-enhanced topological charge pumping, driving the system into a
topological Anderson insulator phase.
We demonstrate that level crossings at the Fermi energy serve as robust
indicators for higher-order topology in two-dimensional superconductors of
symmetry class D. These crossings occur when the boundary condition in one
direction is continuously varied from periodic to open, revealing the
topological distinction between opposite edges. The associated Majorana numbers
acquire nontrivial values whenever the system supports two Majorana zero modes
distributed at its corners. Thanks to their immunity to perturbations that
break crystalline symmetries, Fermi-level crossings are able to characterize a
wide range of higher-order topological superconductors. By directly identifying
level-crossing points from bulk Hamiltonian, we establish the correspondence
between gapped bulk and Majorana corner states in higher-order phases. In the
end, we illustrate this correspondence using two toy models. Our findings
suggest that Fermi-level crossings offer a possible avenue for characterizing
higher-order topological superconductors in a unifying framework.
We develop a general theory of flat-band ferromagnetism in the SU($N$)
Fermi-Hubbard model, which describes the behavior of $N$-component fermions
with SU($N$) symmetric interactions. We focus on the case where the
single-particle spectrum has a flat band and establish a necessary and
sufficient condition for the SU($N$) Hubbard model to exhibit ferromagnetism
when the number of particles is the same as the degeneracy. We show that the
occurrence of ferromagnetism is equivalent to the irreducibility of the
projection matrix onto the space of single-particle ground states. We also
demonstrate that this result can be exploited to establish a rigorous result
for the ferromagnetic SU($N$) Kondo lattice model with a flat band.
Specifically, we prove that when the SU($N$) Hubbard model is ferromagnetic,
the ferromagnetic SU($N$) Kondo lattice model with the same hopping matrix also
exhibits SU($N$) ferromagnetism.
Bilayers consisting of two-dimensional (2D) electron and hole gases separated
by a 10 nm thick AlGaAs barrier are formed by charge accumulation in
epitaxially grown GaAs. Both vertical and lateral electric transport are
measured in the millikelvin temperature range. The conductivity between the
layers shows a sharp tunnel resonance at a density of $1.1 \cdot 10^{10} \text{
cm}^{-2}$, which is consistent with a Josephson-like enhanced tunnel
conductance. The tunnel resonance disappears with increasing densities and the
two 2D charge gases start to show 2D-Fermi-gas behavior. Interlayer
interactions persist causing a positive drag voltage that is very large at
small densities. The transition from the Josephson-like tunnel resonance to the
Fermi-gas behavior is interpreted as a phase transition from an exciton gas in
the Bose-Einstein-condensate state to a degenerate electron-hole Fermi gas.
The presence of periodic modulation in graphene leads to a reconstruction of
the band structure and formation of minibands. In an external uniform magnetic
field, a fractal energy spectrum called Hofstadter butterfly is formed.
Particularly interesting in this regard are superlattices with tunable
modulation strength, such as electrostatically induced ones in graphene. We
perform quantum transport modeling in gate-induced square two-dimensional
superlattice in graphene and investigate the relation to the details of the
band structure. At low magnetic field the dynamics of carriers reflects the
semi-classical orbits which depend on the mini band structure. We theoretically
model transverse magnetic focusing, a ballistic transport technique by means of
which we investigate the minibands, their extent and carrier type. We find a
good agreement between the focusing spectra and the mini band structures
obtained from the continuum model, proving usefulness of this technique.
%positions of van Hove singularities at high magnetic field the calculated
four-probe resistance fit the Hofstadter butterfly spectrum obtained for our
superlattice. Our quantum transport modeling provides an insight into the mini
band structures, and can be applied to other superlattice geometries.
We investigate the effects of ellipticity-induced curvature on atomic
Bose-Einstein condensates confined in quasi-one-dimensional closed-loop
waveguides. Our theoretical study reveals intriguing phenomena arising from the
interplay between curvature and interactions. Density modulations are observed
in regions of high curvature, but these modulations are suppressed by strong
repulsive interactions. Additionally, we observe phase accumulation in regions
with the lowest curvature when the waveguide with persistent current is
squeezed. Furthermore, waveguides hosting persistent currents exhibit dynamic
transformations between states with different angular momenta. These findings
provide insights into the behavior of atomic condensates in curved waveguides,
with implications for fundamental physics and quantum technologies. The
interplay between curvature and interactions offers opportunities for exploring
novel quantum phenomena and engineering quantum states in confined geometries.
The solid diffusive phase transformation involving the nucleation and growth
of one nucleus is universal and frequently employed but has not yet been fully
understood at the atomic level. Here, our first-principles calculations reveal
a structural formation pathway of a series of topologically close-packed (TCP)
phases within the hexagonally close-packed (hcp) matrix. The results show that
the nucleation follows a nonclassical nucleation process, and the whole
structural transformation is completely accomplished by the shuffle-based
displacements, with a specific 3-layer hcp-ordering as the basic structural
transformation unit. The thickening of plate-like TCP phases relies on forming
these hcp-orderings at their coherent TCP/matrix interface to nucleate ledge,
but the ledge lacks the dislocation characteristics considered in the
conventional view. Furthermore, the atomic structure of the critical nucleus
for the Mg2Ca and MgZn2 Laves phases was predicted in terms of Classical
Nucleation Theory (CNT), and the formation of polytypes and off-stoichiometry
in TCP precipitates is found to be related to the nonclassical nucleation
behavior. Based on the insights gained, we also employed high-throughput
screening to explore several common hcp-metallic (including hcp-Mg, Ti, Zr, and
Zn) systems that may undergo hcp-to-TCP phase transformations. These insights
can deepen our understanding of solid diffusive transformations at the atomic
level, and constitute a foundation for exploring other technologically
important solid diffusive transformations.
In this paper, the electronic structure and bond properties of MoS2, MoSe2
and MoTe2 are studied. Density functional theory (DFT) calculates combined with
the binding energy and bond-charge (BBC) model to obtain electronic structure,
binding energy shift and bond properties. It is found that electrostatic
shielding by electron exchange is the main cause of density fluctuation. A
method for calculating the density of Green's function with energy level shift
is established. It provides new methods and ideas for the further study of the
binding energy, bond states and electronic properties of nanomaterials.
Using machine learning method, we investigate various domain walls for the
recently discovered single-element ferroelectrics bismuth monolayer [Nature
617, 67 (2023)]. Surprisingly, we find that the charged domain wall
configuration has a lower energy than the uncharged domain wall structure due
to its low electrostatic repulsion potential. Two stable charged domain wall
configurations exhibit topological interfacial states near their domain walls,
which is caused by the change of the Z_2 number between ferroelectric and
paraelectric states. Interestingly, different from the edge states of
topological insulators, the topological interfacial states related Dirac bands
are contributed from different edges which is caused by the build-in electric
field of FE. Our works thus indicate that domain walls in two-dimensional
bismuth can be a good platform for ferroelectric domain wall devices.
Motivated by the recent experimental breakthroughs in observing Fractional
Quantum Anomalous Hall (FQAH) states in moir\'e Transition Metal Dichalcogenide
(TMD) bilayers, we propose and study various unconventional phase transitions
between quantum Hall phases and Fermi liquids or charge ordered phases upon
tuning the bandwidth. At filling $\nu=-\frac{2}{3}$, we describe a direct
transition between the FQAH state and a Charge Density Wave (CDW) insulator.
The critical theory resembles that of the familiar deconfined quantum critical
point(DQCP) but with an additional Chern-Simons term. At filling
$\nu=-\frac{1}{2}$, we study the possibility of a continuous transition between
the composite Fermi liquid (CFL) and the Fermi liquid (FL) building on and
refining previous work by Barkeshli and McGreevy. Crucially we show that
translation symmetry alone is enough to enable a second order CFL-FL
transition. We argue that there must be critical CDW fluctuations though
neither phase has long range CDW order. We present experimental signatures the
most striking of which is a universal jump of both longitudinal and Hall
resistivities at the critical point. With disorder, we argue that the CDW order
gets pinned and the CFL-FL evolution happens through an intermediate
electrically insulating phase with mobile neutral fermions. A clean analog of
this insulating phase with long range CDW order and a neutral fermi surface can
potentially also exist. We discuss the properties of this phase and the nature
of its phase transitions. We also present a critical theory for the CFL to FL
transition at filling $\nu=-\frac{3}{4}$. Our work opens up a new avenue to
realize deconfined criticalities and fractionalized phases beyond familiar
Landau level physics in the moir\'e Chern band system.
The introduction of lubricant between fluid and substrate endows the
Liquid-Infused Slippery Surfaces with excellent wetting properties: low contact
angle, various liquids repellency, ice-phobic and self-healing. Droplets moving
on such surfaces have been widely demonstrated to obey a
Landau-Levich-Derjaguin (LLD) friction. Here, we show that this power law is
surprisingly decreased with the droplet accelerates: in the rapid droplet
regime, the slippery surfaces seem more slippery than LLD friction. Combining
experimental and numerical techniques, we find that the meniscus surrounding
the droplet exhibits an incompletely developed state. The Incompletely
Developed Meniscus possesses shorter shear length and thicker shear thickness
than the prediction of Bretherton model and therefore is responsible for the
more slippery regime. With an extended Bretherton model, we not only provide an
analytical description to the IDM behavior but also the friction when the
Capillary Number of the moving droplet is larger than the Critical Capillary
Number.

Date of feed: Tue, 12 Sep 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) **A versatile laser-based apparatus for time-resolved ARPES with micro-scale spatial resolution. (arXiv:2309.04524v1 [cond-mat.mtrl-sci])**

Sydney K. Y. Dufresne, Sergey Zhdanovich, Matteo Michiardi, Bradley G. Guislain, Marta Zonno, Sean Kung, Giorgio Levy, Arthur K. Mills, Fabio Boschini, David J. Jones, Andrea Damascelli

**Deformed Fredkin model for the $\nu{=}5/2$ Moore-Read state on thin cylinders. (arXiv:2309.04527v1 [cond-mat.str-el])**

Cristian Voinea, Songyang Pu, Ammar Kirmani, Pouyan Ghaemi, Armin Rahmani, Zlatko Papić

**Flatband slows down polariton dynamics in strongly coupled cavities. (arXiv:2309.04544v1 [cond-mat.mes-hall])**

Yesenia A García Jomaso, Brenda Vargas, David Ley Domínguez, Román Armenta, Huziel E. Sauceda, César L Ordoñez-Romero, Hugo A Lara-García, Arturo Camacho-Guardian, Giuseppe Pirruccio

**Erbium-doped WS$_2$ with Down- and Up-Conversion Photoluminescence Integrated on Silicon for Heterojunction Infrared Photodetection. (arXiv:2309.04574v1 [physics.app-ph])**

Qiuguo Li (1), Hao Rao (2), Haijuan Mei (1), Zhengting Zhao (1), Weiping Gong (1), Andrea Camposeo (3), Dario Pisignano (3,4), Xianguang Yang (2) ((1) Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, (2) Institute of Nanophotonics, Jinan University, (3) NEST, Istituto Nanoscienze-CNR, (4) Dipartimento di Fisica-Università di Pisa)

**New type of Bernstein modes in two-dimensional electron liquid. (arXiv:2309.04582v1 [cond-mat.mes-hall])**

A. N. Afanasiev, P. S. Alekseev, A. A. Greshnov, M. A. Semina

**Electrical Control of Two-Dimensional Electron-Hole Fluids in the Quantum Hall Regime. (arXiv:2309.04600v1 [cond-mat.mes-hall])**

Bo Zou, Yongxin Zeng, A.H. MacDonald, Artem Strashko

**Limits of economy and fidelity for programmable assembly of size-controlled triply-periodic polyhedra. (arXiv:2309.04632v1 [cond-mat.soft])**

Carlos M. Duque, Douglas M. Hall, Botond Tyukodi, Michael F. Hagan, Christian D. Santangelo, Gregory M. Grason

**Discovery of Charge Order in the Transition Metal Dichalcogenide Fe$_{x}$NbS$_2$. (arXiv:2309.04648v1 [cond-mat.str-el])**

Shan Wu, Rourav Basak, Wenxin Li, Jong-Woo Kim, Philip J. Ryan, Donghui Lu, Makoto Hashimoto, Christie Nelson, Raul Acevedo-Esteves, Shannon C. Haley, James G. Analytis, Yu He, Alex Frano, Robert J. Birgeneau

**Witnessing Environment Induced Topological Phase Transitions via Quantum Monte Carlo and Cluster Perturbation Theory Studies. (arXiv:2309.04719v1 [cond-mat.str-el])**

F. Pavan, A. de Candia, G. Di Bello, V. Cataudella, N. Nagaosa, C. A. Perroni, G. De Filippis

**$g$-factor engineering with InAsSb alloys toward zero band gap limit. (arXiv:2309.04779v1 [cond-mat.mtrl-sci])**

Yuxuan Jiang, Maksim Ermolaev, Seongphill Moon, Gela Kipshidze, Gregory Belenky, Stefan Svensson, Mykhaylo Ozerov, Dmitry Smirnov, Zhigang Jiang, Sergey Suchalkin

**Graph Vertex Model. (arXiv:2309.04818v1 [cond-mat.soft])**

Tanmoy Sarkar, Matej Krajnc

**High-throughput first-principles calculations screening the coherent topologically close-packed precipitates in hexagonal close-packed metallic systems. (arXiv:2309.04822v1 [cond-mat.mtrl-sci])**

Junyuan Bai, Xueyong Pang, Gaowu Qin

**Observation of flat and weakly dispersing bands in a van der Waals semiconductor Nb3Br8 with breathing kagome lattice. (arXiv:2309.04865v1 [cond-mat.mes-hall])**

Sabin Regmi, Anup Pradhan Sakhya, Tharindu Fernando, Yuzhou Zhao, Dylan Jeff, Milo Sprague, Favian Gonzalez, Iftakhar Bin Elius, Mazharul Islam Mondal, Nathan Valadez, Damani Jarrett, Alexis Agosto, Jihui Yang, Jiun-Haw Chu, Saiful I. Khondaker, Xiaodong Xu, Ting Cao, Madhab Neupane

**Experimental topological quantum computing with electric circuits. (arXiv:2309.04896v1 [cond-mat.mes-hall])**

Deyuan Zou, Naiqiao Pan, Tian Chen, Houjun Sun, Xiangdong Zhang

**Deterministic and non-volatile switching of all-van der Waals spin-orbit torque system above room temperature without external magnetic fields. (arXiv:2309.04930v1 [physics.app-ph])**

Shivam N. Kajale, Thanh Nyugen, Mingda Li, Deblina Sarkar

**Transport Anisotropy in One-dimensional Graphene Superlattice in the High Kronig-Penney Potential Limit. (arXiv:2309.04931v1 [cond-mat.mes-hall])**

Tianlin Li, Hanying Chen, Kun Wang, Yifei Hao, Le Zhang, Kenji Watanabe, Takashi Taniguchi, Xia Hong

**Power laws of natural swarms are fingerprints of an extended critical region. (arXiv:2309.05064v1 [cond-mat.stat-mech])**

R. González-Albaladejo, L. L. Bonilla

**Insights into the Energy Transfers in Hydrodynamic Turbulence Using Field-theoretic Tools. (arXiv:2309.05207v1 [physics.flu-dyn])**

Mahendra K. Verma

**Extended Josephson junction qubit system. (arXiv:2309.05212v1 [quant-ph])**

Andrey Grankin, Alicia J. Kollár, Mohammad Hafezi

**Melting of excitonic insulator phase by an intense terahertz pulse in Ta$_2$NiSe$_5$. (arXiv:2309.05286v1 [cond-mat.str-el])**

Naoki Takamura, Tatsuya Miyamoto, Ryohei Ikeda, Tetsushi Kubo, Masaki Yamamoto, Hiroki Sato, Yang Han, Takayuki Ito, Tetsu Sato, Akitoshi Nakano, Hiroshi Sawa, Hiroshi Okamoto

**Janus-graphene: a two-dimensional half-auxetic carbon allotropes with non-chemical Janus configuration. (arXiv:2309.05319v1 [cond-mat.mtrl-sci])**

Linfeng Yu, Jianhua Xu, Chen Shen, Hongbin Zhang, Xiong Zheng, Huiming Wang, Zhenzhen Qin, Guangzhao Qin

**Chemisorption Induced Formation of Biphenylene Dimer on Surfaces. (arXiv:2309.05341v1 [cond-mat.mtrl-sci])**

Zhiwen Zeng, Dezhou Guo, Tao Wang, Qifan Chen, Adam Matěj, Jianmin Huang, Dong Han, Qian Xu, Aidi Zhao, Pavel Jelínek, Dimas G. de Oteyza, Jean-Sabin McEwen, Junfa Zhu

**Topological nonsymmorphic insulator versus Dirac semimetal in KZnBi. (arXiv:2309.05461v1 [cond-mat.mtrl-sci])**

Rahul Verma, Bikash Patra, Bahadur Singh

**Topological transitions in dissipatively coupled Su-Schrieffer-Heeger models. (arXiv:2309.05479v1 [quant-ph])**

Jayakrishnan M. P. Nair, Marlan O. Scully, Girish S. Agarwal

**Majorana fermion induced power-law scaling in the violation of Wiedemann-Franz law. (arXiv:2309.05492v1 [cond-mat.mes-hall])**

Ritesh Das, Colin Benjamin

**Singularity theory of Weyl-point creation and annihilation. (arXiv:2309.05506v1 [math-ph])**

György Frank, Gergő Pintér, András Pályi

**The Merged Potts-Clock Model: Algebraic and Conventional Multistructured Multicritical Orderings in Two and Three Dimensions. (arXiv:2309.05543v1 [cond-mat.stat-mech])**

E. Can Artun, A. Nihat Berker

**Topological phase transition and tunable surface states in YBi. (arXiv:2309.05553v1 [cond-mat.mtrl-sci])**

Ramesh Kumar, Mukhtiyar Singh

**Itinerant ferromagnetism in transition metal dichalcogenides moir\'e superlattices. (arXiv:2309.05556v1 [cond-mat.str-el])**

Pawel Potasz, Nicolas Morales-Duran, Nai Chao Hu, Allan H. MacDonald

**Reentrant Ferromagnetic Ordering of the Random-Field Heisenberg Model in d>2 Dimensions: Fourier-Legendre Renormalization-Group Theory. (arXiv:2309.05576v1 [cond-mat.dis-nn])**

Alpar Türkoğlu, A. Nihat Berker

**Atomistic Control in Molecular Beam Epitaxy Growth of Intrinsic Magnetic Topological Insulator MnBi2Te4. (arXiv:2309.05656v1 [cond-mat.mtrl-sci])**

Hyunsue Kim, Mengke Liu, Lisa Frammolino, Yanxing Li, Fan Zhang, Woojoo Lee, Chengye Dong, Yi-Fan Zhao, Guan-Yu Chen, Pin-Jui Hsu, Cui-Zu Chang, Joshua Robinson, Jiaqiang Yan, Xiaoqin Li, Allan H. MacDonald, Chih-Kang Shih

**Massless multifold Hopf semimetals. (arXiv:2203.09966v3 [cond-mat.mes-hall] UPDATED)**

Ansgar Graf, Frédéric Piéchon

**Breakdown of quantization in nonlinear Thouless pumping. (arXiv:2205.10978v2 [nlin.PS] UPDATED)**

Thomas Tuloup, Raditya Weda Bomantara, Jiangbin Gong

**Enhanced thermally-activated skyrmion diffusion with tunable effective gyrotropic force. (arXiv:2206.00791v2 [cond-mat.mtrl-sci] UPDATED)**

Takaaki Dohi, Markus Weißenhofer, Nico Kerber, Fabian Kammerbauer, Yuqing Ge, Klaus Raab, Jakub Zàzvorka, Maria-Andromachi Syskaki, Aga Shahee, Moritz Ruhwedel, Tobias Böttcher, Philipp Pirro, Gerhard Jakob, Ulrich Nowak, Mathias Kläui

**Deconfined criticalities and dualities between chiral spin liquid, topological superconductor and charge density wave Chern insulator. (arXiv:2206.08939v3 [cond-mat.str-el] UPDATED)**

Xue-Yang Song, Ya-Hui Zhang

**Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La$_{1.65}$Eu$_{0.2}$Sr$_{0.15}$CuO$_4$. (arXiv:2209.11528v3 [cond-mat.str-el] UPDATED)**

Martin Bluschke, Naman K. Gupta, Hoyoung Jang, Ali A. Husain, Byungjune Lee, MengXing Na, Brandon Dos Remedios, Steef Smit, Peter Moen, Sang-Youn Park, Minseok Kim, Dogeun Jang, Hyeongi Choi, Ronny Sutarto, Alexander H. Reid, Georgi L. Dakovski, Giacomo Coslovich, Quynh L. Nguyen, Nicolas G. Burdet, Ming-Fu Lin, Alexandre Revcolevschi, Jae-Hoon Park, Jochen Geck, Joshua J. Turner, Andrea Damascelli, David G. Hawthorn

**G-crossed Modularity of Symmetry-Enriched Topological Phases. (arXiv:2210.14943v2 [cond-mat.str-el] UPDATED)**

Arman Babakhani, Parsa Bonderson

**Observation of self-patterned defect formation in atomic superfluids -- from ring dark solitons to vortex dipole necklaces. (arXiv:2211.08575v3 [cond-mat.quant-gas] UPDATED)**

Hikaru Tamura, Cheng-An Chen, Chen-Lung Hung

**The One-dimensional Chiral Anomaly and its Disorder Response. (arXiv:2302.13556v4 [cond-mat.mes-hall] UPDATED)**

Zheng Qin, Dong-Hui Xu, Zhen Ning, Rui Wang

**Higher-order topological superconductors characterized by Fermi-level crossings. (arXiv:2303.07698v3 [cond-mat.mes-hall] UPDATED)**

Hong Wang, Xiaoyu Zhu

**Flat-band ferromagnetism in the SU($N$) Hubbard and Kondo lattice models. (arXiv:2303.15820v2 [cond-mat.str-el] UPDATED)**

Kensuke Tamura, Hosho Katsura

**Josephson-like tunnel resonance and large Coulomb drag in GaAs-based electron-hole bilayers. (arXiv:2304.06691v3 [cond-mat.mes-hall] UPDATED)**

M. L. Davis (1), S. Parolo (1), C. Reichl (1), W. Dietsche (1,2), W. Wegscheider (1,3) ((1) Solid State Physics Laboratory ETH Zürich, (2) Max-Planck-Institut für Festkörperforschung Stuttgart, (3) Quantum Center ETH Zürich)

**Probing miniband structure and Hofstadter butterfly in gated graphene superlattices via magnetotransport. (arXiv:2304.07478v2 [cond-mat.mes-hall] UPDATED)**

Alina Mreńca-Kolasińska, Szu-Chao Chen, Ming-Hao Liu

**Engineering phase and density of Bose-Einstein condensates in curved waveguides with toroidal topology. (arXiv:2306.11873v2 [cond-mat.quant-gas] UPDATED)**

Yelyzaveta Nikolaieva, Luca Salasnich, Alexander Yakimenko

**Structural pathway for nucleation and growth of topologically close-packed phase from parent hexagonal crystal. (arXiv:2307.06676v2 [cond-mat.mtrl-sci] UPDATED)**

Junyuan Bai, Hongbo Xie, Xueyong Pang, Min Jiang, Gaowu Qin

**Electrostatic shielding effect and Binding energy shift of MoS2, MoSe2 and MoTe2 materials. (arXiv:2307.08035v4 [cond-mat.mtrl-sci] UPDATED)**

Yaorui Tan, Maolin Bo

**Topological interfacial states in ferroelectric domain walls of two-dimensional bismuth. (arXiv:2308.04633v2 [cond-mat.mtrl-sci] UPDATED)**

Wei Luo, Yang Zhong, Hongyu Yu, Muting Xie, Yingwei Chen, Hongjun Xiang, Laurent Bellaiche

**Phase transitions out of quantum Hall states in moir\'e TMD bilayers. (arXiv:2308.10903v2 [cond-mat.str-el] UPDATED)**

Xue-Yang Song, Ya-Hui Zhang, T. Senthil

**Rapid droplet leads the Liquid-Infused Slippery Surfaces more slippery. (arXiv:2309.02038v2 [physics.flu-dyn] UPDATED)**

Kun Li, Cunjing Lv, Xi-Qiao Feng

Found 11 papers in prb We present a dual-band topological transport of edge states and corner states in a composite acoustic higher-order topological metamaterial (AHOTM) composed of meta-atoms of hollow tubes (HTs) and meta-molecules of opened-hole hollow tubes (OHTs) arrayed as a regular triangle in a hexagonal lattice … Information scrambling is nowadays one of the most important topics in various fields of research. Measurement-only circuits (MoCs) exhibit specific information scrambling dynamics, depending on the types of projective measurements and their mutual anticommutativity. The spatial range of the project… Topology and many-body localization (MBL) have opened new avenues for preserving quantum information at finite energy density. Resonant delocalization plays a crucial role in destabilizing these phenomena. In this paper, we study the statistical properties of many-body resonances in a disordered int… The intriguing discovery of bidimensional structures in solid-state physics has motivated the seeking of their analogs in many fields. In this paper, we propose a general scheme to achieve Dirac cones in the microwave domain. It is based on a bidimensional locally resonant metamaterial ruled by a ti… Magnetic multiple-$Q$ states consisting of multiple spin density waves are a source of unconventional topological spin textures, such as skyrmion and hedgehog. We theoretically investigate a topologically nontrivial double-$Q$ state with a net spin scalar chirality on a two-dimensional square lattic… Green's function zeros, which can emerge only if correlation is strong, have been for long overlooked and believed to be devoid of any physical meaning, unlike Green's function poles. Here, we prove that Green's function zeros instead contribute on the same footing as poles to determine the topologi… We consider the topological protection of entanglement and particle fluctuations for a general one-dimensional chiral topological insulator with winding number $\mathcal{I}$. We prove, in particular, that when the periodic system is divided spatially into two equal halves, the single-particle entang… The relentless miniaturization of transistors drives the search for alternative metals to copper for low-dimension interconnects. Indeed, some elementary metals, like ruthenium, become less resistive than copper at low dimensions, leading to smaller losses in the connection lines. For most parts, su… We report finite-size topology in the quintessential time-reversal (TR) invariant systems, the quantum spin Hall insulator (QSHI) and the three-dimensional, strong topological insulator (STI)—previously-identified helical or Dirac cone boundary states of these phases hybridize in wire or slab geomet… Harnessing the power of deep learning, researchers have developed a novel method to fit the band structure parameters of complex 2D materials, such as trilayer graphene. By training neural networks on simulated data for the density of states, and then minimizing the effective distance between network-generated images and experimental data, the authors obtain here accurate predictions of tight-binding parameters, validating their results against literature values. This method can be easily extended to other complex two-dimensional materials, as well as to other experimental techniques. We study the quantum valley Hall effect and related domain wall modes in twisted bilayer graphene at a large commensurate angle. Due to the quantum valley and subvalley Hall effect, a small deviation from the commensurate angle generates two-dimensional conducting network patterns composed of one-di…

Date of feed: Tue, 12 Sep 2023 03:17:08 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) **Dual-band acoustic higher-order topological metamaterial composed of meta-atoms and meta-molecules**

Changlin Ding, Jianbing Shi, Yibao Dong, Yun Bai, Shilong Zhai, and Xiaopeng Zhao

Author(s): Changlin Ding, Jianbing Shi, Yibao Dong, Yun Bai, Shilong Zhai, and Xiaopeng Zhao

[Phys. Rev. B 108, 094103] Published Mon Sep 11, 2023

**Phase transition and evidence of fast-scrambling phase in measurement-only quantum circuits**

Yoshihito Kuno, Takahiro Orito, and Ikuo Ichinose

Author(s): Yoshihito Kuno, Takahiro Orito, and Ikuo Ichinose

[Phys. Rev. B 108, 094104] Published Mon Sep 11, 2023

**Renormalization view on resonance proliferation between many-body localized phases**

Jared Jeyaretnam, Christopher J. Turner, and Arijeet Pal

Author(s): Jared Jeyaretnam, Christopher J. Turner, and Arijeet Pal

[Phys. Rev. B 108, 094205] Published Mon Sep 11, 2023

**Measuring Dirac cones in a brick-wall lattice microwave metamaterial**

Bing Li, Simon Yves, Alexandre Delory, Shiqi Liu, Mathias Fink, and Fabrice Lemoult

Author(s): Bing Li, Simon Yves, Alexandre Delory, Shiqi Liu, Mathias Fink, and Fabrice Lemoult

[Phys. Rev. B 108, 094301] Published Mon Sep 11, 2023

**Chern insulating state with double-$Q$ ordering wave vectors at the Brillouin zone boundary**

Satoru Hayami

Author(s): Satoru Hayami

[Phys. Rev. B 108, 094416] Published Mon Sep 11, 2023

**Unified role of Green's function poles and zeros in correlated topological insulators**

Andrea Blason and Michele Fabrizio

Author(s): Andrea Blason and Michele Fabrizio

[Phys. Rev. B 108, 125115] Published Mon Sep 11, 2023

**Entanglement and particle fluctuations of one-dimensional chiral topological insulators**

Kyle Monkman and Jesko Sirker

Author(s): Kyle Monkman and Jesko Sirker

[Phys. Rev. B 108, 125116] Published Mon Sep 11, 2023

**First-principles investigation of thickness-dependent electrical resistivity for low-dimensional interconnects**

Benoit Van Troeye, Kiroubanand Sankaran, Zsolt Tokei, Christoph Adelmann, and Geoffrey Pourtois

Author(s): Benoit Van Troeye, Kiroubanand Sankaran, Zsolt Tokei, Christoph Adelmann, and Geoffrey Pourtois

[Phys. Rev. B 108, 125117] Published Mon Sep 11, 2023

**Time-reversal invariant finite-size topology**

R. Flores-Calderon, Roderich Moessner, and Ashley M. Cook

Author(s): R. Flores-Calderon, Roderich Moessner, and Ashley M. Cook

[Phys. Rev. B 108, 125410] Published Mon Sep 11, 2023

**Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene**

Paul Henderson, Areg Ghazaryan, Alexander A. Zibrov, Andrea F. Young, and Maksym Serbyn

Author(s): Paul Henderson, Areg Ghazaryan, Alexander A. Zibrov, Andrea F. Young, and Maksym Serbyn

[Phys. Rev. B 108, 125411] Published Mon Sep 11, 2023

**Quantum valley and subvalley Hall effect in large-angle twisted bilayer graphene**

Chiranjit Mondal, Rasoul Ghadimi, and Bohm-Jung Yang

Author(s): Chiranjit Mondal, Rasoul Ghadimi, and Bohm-Jung Yang

[Phys. Rev. B 108, L121405] Published Mon Sep 11, 2023

Found 5 papers in prl This work explores the asymmetry of quantum steering in a setup using high-dimensional entanglement. We construct entangled states with the following properties: (i) one party (Bob) can never steer the state of the other party (Alice), considering the most general measurements, and (ii) Alice can st… A joint analysis of data from the CMB, weak lensing, peculiar velocities, and galaxy clustering, shows that an extension of the concordance cosmological model which includes the suppression of the growth of cosmic structure can alleviate two widely discussed cosmological tensions. $Q$-balls are nontopological solitons that coherently rotate in field space. We show that these coherent rotations can induce superradiance for scattering waves, thanks to the fact that the scattering involves two coupled modes. Despite the conservation of the particle number in the scattering, the … Magnetization measurements on graphene/hBN samples in a wide range of chemical potential reveal paramagnetism at saddle points of the moiré band structure. We investigate the exciton fine structure in atomically thin ${\mathrm{WSe}}_{2}$-based van der Waals heterostructures where the density of optical modes at the location of the semiconductor monolayer can be tuned. The energy splitting $\mathrm{Δ}$ between the bright and dark exciton is measured by …

Date of feed: Tue, 12 Sep 2023 03:17:07 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) **Unlimited One-Way Steering**

Pavel Sekatski, Florian Giraud, Roope Uola, and Nicolas Brunner

Author(s): Pavel Sekatski, Florian Giraud, Roope Uola, and Nicolas Brunner

[Phys. Rev. Lett. 131, 110201] Published Mon Sep 11, 2023

**Evidence for Suppression of Structure Growth in the Concordance Cosmological Model**

Nhat-Minh Nguyen, Dragan Huterer, and Yuewei Wen

Author(s): Nhat-Minh Nguyen, Dragan Huterer, and Yuewei Wen

[Phys. Rev. Lett. 131, 111001] Published Mon Sep 11, 2023

**$Q$-Ball Superradiance**

Paul M. Saffin, Qi-Xin Xie, and Shuang-Yong Zhou

Author(s): Paul M. Saffin, Qi-Xin Xie, and Shuang-Yong Zhou

[Phys. Rev. Lett. 131, 111601] Published Mon Sep 11, 2023

**Paramagnetic Singularities of the Orbital Magnetism in Graphene with a Moiré Potential**

J. Vallejo Bustamante, R. Ribeiro-Palau, C. Fermon, M. Pannetier-Lecoeur, K. Watanabe, T. Tanigushi, R. Deblock, S. Guéron, M. Ferrier, J. N. Fuchs, G. Montambaux, F. Piéchon, and H. Bouchiat

Author(s): J. Vallejo Bustamante, R. Ribeiro-Palau, C. Fermon, M. Pannetier-Lecoeur, K. Watanabe, T. Tanigushi, R. Deblock, S. Guéron, M. Ferrier, J. N. Fuchs, G. Montambaux, F. Piéchon, and H. Bouchiat

[Phys. Rev. Lett. 131, 116201] Published Mon Sep 11, 2023

**Control of the Bright-Dark Exciton Splitting Using the Lamb Shift in a Two-Dimensional Semiconductor**

L. Ren (任磊), C. Robert, M. Glazov, M. Semina, T. Amand, L. Lombez, D. Lagarde, T. Taniguchi, K. Watanabe, and X. Marie

Author(s): L. Ren (任磊), C. Robert, M. Glazov, M. Semina, T. Amand, L. Lombez, D. Lagarde, T. Taniguchi, K. Watanabe, and X. Marie

[Phys. Rev. Lett. 131, 116901] Published Mon Sep 11, 2023

Found 2 papers in pr_res With the help of scanning tunneling microscopy (STM) it has become possible to address single magnetic impurities on superconducting surfaces and to investigate the peculiar properties of the in-gap states known as Yu-Shiba-Rusinov (YSR) states. These systems are an ideal playground to investigate m… Chiral pairing in magic-angle twisted bilayer graphene is shown to manifest in the appearance of an anomalous Josephson effect (${\varphi}_{0}$ behavior) without requiring any magnetic materials or fields. Such behavior arises from the combination of chiral pairing and nontrivial topology, which can effectively break inversion symmetry.

Date of feed: Tue, 12 Sep 2023 03:17:08 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) **Full counting statistics of Yu-Shiba-Rusinov bound states**

David Christian Ohnmacht, Wolfgang Belzig, and Juan Carlos Cuevas

Author(s): David Christian Ohnmacht, Wolfgang Belzig, and Juan Carlos Cuevas

[Phys. Rev. Research 5, 033176] Published Mon Sep 11, 2023

**Intrinsic nonmagnetic ${ϕ}_{0}$ Josephson junctions in twisted bilayer graphene**

M. Alvarado, P. Burset, and A. Levy Yeyati

Author(s): M. Alvarado, P. Burset, and A. Levy Yeyati

[Phys. Rev. Research 5, L032033] Published Mon Sep 11, 2023

Found 1 papers in nano-lett

Date of feed: Mon, 11 Sep 2023 13:07:02 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] Toroidal Dipole BIC-Driven Highly Robust Perfect Absorption with a Graphene-Loaded Metasurface**

Rong Jin, Lujun Huang, Chaobiao Zhou, Jiaoyang Guo, Zhenchu Fu, Jian Chen, Jian Wang, Xin Li, Feilong Yu, Jin Chen, Zengyue Zhao, Xiaoshuang Chen, Wei Lu, and Guanhai LiNano LettersDOI: 10.1021/acs.nanolett.3c02958

Found 1 papers in sci-rep Scientific Reports, Published online: 11 September 2023; doi:10.1038/s41598-023-42109-x**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) **Author Correction: Exploring room temperature spin transport under band gap opening in bilayer graphene**

Ivan J. Vera-Marun