Found 40 papers in cond-mat While a complete understanding of the phase-diagram of Kitaev materials has
yet to be achieved, important insights can be gained from studying
low-dimensional models such as chains and ladders. Here we focus on the
Kitaev-Gamma ladder with both Kitaev ($K$) and Gamma ($\Gamma$) couplings. We
first report two new phases near $K$=0, $\Gamma\mathord{>}$0, termed
SPT$_\alpha$, and SPT$_\beta$, which are magnetically disordered and
characterize them as symmetry protected topological (SPT) states. We then
clarify the nature of the A$\Gamma$-phase surrounding the point $K$=0,
$\Gamma\mathord{=}1$ point, by revealing a non-zero string order parameter. The
string order is uncovered by first applying a local unitary transformation,
then a non-local, arriving at a model which shows ordinary long-range order. In
a sense, the order is therefore twice hidden. In addition to the long-range
string order, the existence of degenerate edge modes is another hallmark of a
SPT phase, of which there are four in the A$\Gamma$-phase. Remarkably, the
edge-states in the A$\Gamma$-phase only respond to a field applied along the
$\mathbf{\hat{b}}$-direction ([1-10]), contrary to the Kitaev phases in the
ladder. Furthermore, the topology of the A$\Gamma$-phase is robust under a
field applied in the $\mathbf{\hat{a}}$ and $\mathbf{\hat{c}}$ directions, as
the degeneracy in the entanglement spectrum is intact. The A$\Gamma$-phase is
then protected by $TR\times \mathcal{R}_{b}$ symmetry, the product of
time-reversal ($TR$) and $\pi$ rotation around the $\mathbf{\hat b}$-axis
($\mathcal{R}_{b}$).
We investigate a large class of $\mathcal{N} = (2, 2)$ supersymmetric field
theories in two dimensions, which contains the Murugan-Stanford-Witten model,
and can be naturally regarded as a disordered generalization of the
two-dimensional Landau-Ginzburg models. We analyze the two and four-point
functions of chiral superfields, and extract from them the central charge, the
operator spectrum, and the chaos exponent in these models. Some of the models
exhibit a conformal manifold parameterized by the variances of the random
couplings. We compute the Zamolodchikov metrics on the conformal manifold, and
demonstrate that the chaos exponent varies nontrivally along the conformal
manifolds. Finally, we introduce and perform some preliminary analysis of a
disordered generalization of the gauged linear sigma models, and discuss the
low energy theories as ensemble averages of Calabi-Yau sigma models over
complex structure moduli space.
We investigate superfluidity of bosons in gapped topological bands and
discover a new phase that has no counterparts in the previous literature. This
phase is characterized by a highly unconventional modulation of the order
parameter, breaking the crystallographic symmetry, and for which the
condensation momentum is neither zero nor any other high-symmetry vector of the
Brillouin zone. This unconventional structure impacts the spectrum of
Bogoliubov excitations and, consequently, the speed of sound in the system.
Even in the case of perfectly flat bands, the speed of sound and Bogoliubov
excitations remain nonvanishing, provided that the underlying topology and
quantum geometry are nontrivial. Furthermore, we derive detailed expressions
for the superfluid weight using the Popov hydrodynamic formalism for
superfluidity and provide estimates for the Berezinskii-Kosterlitz-Thouless
temperature, which is significantly enhanced by the nontriviality of the
underlying quantum metric. These results are applicable to generic topological
bosonic bands, with or without dispersion. To illustrate our findings, we
employ the Haldane model with a tunable bandwidth, including the narrow
lowest-band case. Within this model, we also observe a re-entrant superfluid
behavior: As the Haldane's magnetic flux is varied, the
Berezinskii-Kosterlitz-Thouless transition temperature initially decreases to
almost zero, only to resurface with renewed vigor.
We investigate the spectral properties of a non-Hermitian
quasi-one-dimensional lattice in two possible dimerization configurations.
Specifically, we focus on a non-Hermitian diamond chain that presents a
zero-energy flat band. The flat band originates from wave interference and
results in eigenstates with a finite contribution only on two sites of the unit
cell. To achieve the non-Hermitian characteristics, we introduce non-reciprocal
intrasite hopping terms in the chain. This leads to the accumulation of
eigenstates on the boundary of the system, known as the non-Hermitian skin
effect. Despite this accumulation of eigenstates, for one of the two possible
configurations, we can characterize the presence of non-trivial edge states at
zero energy by a real-space topological invariant known as the biorthogonal
polarization. We show that this invariant, evaluated using the destructive
interference method, characterizes the non-trivial phase of the non-Hermitian
diamond chain. For the other possible non-Hermitian configuration, we find that
there is a finite quantum metric associated with the flat band. Additionally,
we observe the skin effect despite having the system a purely real or imaginary
spectrum. For both configurations, we show that two non- Hermitian diamond
chains can be mapped into two models of the Su-Schrieffer-Heeger chains, either
non-Hermitian and Hermitian, in the presence of a flat band. This mapping
allows us to draw valuable insights into the behavior and properties of these
systems.
Circuit topology employs fundamental units of entanglement, known as soft
contacts, for constructing knots from the bottom up, utilising circuit topology
relations, namely parallel, series, cross, and concerted relations. In this
article, we further develop this approach to facilitate the analysis of
chirality, which is a significant quantity in polymer chemistry. To achieve
this, we translate the circuit topology approach to knot engineering into a
braid-theoretic framework. This enables us to calculate the Jones polynomial
for all possible binary combinations of contacts in cross or concerted
relations and to show that, for series and parallel relations, the polynomial
factorises. Our results demonstrate that the Jones polynomial provides a
powerful tool for analysing the chirality of molecular knots constructed using
circuit topology. The framework presented here can be used to design and
engineer a wide range of entangled chain with desired chiral properties, with
potential applications in fields such as materials science and nanotechnology.
We theoretically investigate the superfluid phase transition of helium-3
under nanoscale confinement of one spatial dimension realized in recent
experiments. Instead of the 3x3 complex matrix order parameter found in the
three-dimensional system, the quasi two-dimensional superfluid is described by
a reduced 3x2 complex matrix. It features a nodal quasiparticle spectrum,
regardless of the value of the order parameter. The origin of the 3x2 order
parameter is first illustrated via the two-particle Cooper problem, where
Cooper pairs in the $p_x$ and $p_y$ orbitals are shown to have a lower bound
state energy than those in $p_z$ orbitals, hinting at their energetically
favorable role at the phase transition. We then compute the Landau free energy
under confinement within the mean-field approximation and show that the
critical temperature for condensation of the 3x2 order parameter is larger than
for other competing phases. Through exact minimization of the mean-field free
energy, we show that mean-field theory predicts precisely two energetically
degenerate superfluid orders to emerge at the transition that are not related
by symmetry: the A-phase and the planar phase. Beyond the mean-field
approximation, we show that strong-coupling corrections favor the A-phase
observed in experiment, whereas weak-coupling perturbative renormalization
group predicts the planar phase to be stable.
The synthesis of thin films of magnetic topological materials is necessary to
achieve novel quantized Hall effects and electrodynamic responses. EuIn2As2 is
a recently predicted topological axion insulator that has an antiferromagnetic
ground state and an inverted band structure but that has only been synthesized
and studied as a single crystal. We report on the synthesis of c-axis oriented
EuIn2As2 films by molecular beam epitaxy on sapphire substrates. By careful
tuning of the substrate temperature during growth, we stabilize the Zintl phase
of EuIn2As2 expected to be topologically non-trivial. The magnetic properties
of these films reproduce those seen in single crystals but their resistivity is
enhanced when grown at lower temperatures. We additionally find that the
magnetoresistance of EuIn2As2 is negative even up to fields as high as 31T but
while it is highly anisotropic at low fields, it becomes nearly isotropic at
high magnetic fields above 5T. Overall, the transport characteristics of
EuIn2As2 appear similar to those of chalcogenide topological insulators,
motivating the development of devices to gate tune the Fermi energy to reveal
topological features in quantum transport.
We investigate the limit of X-ray detection at room temperature on rare-earth
molecular films using lanthanum and a pyridine-based dicarboxamide organic
linker as a model system. Synchrotron X-ray scanning tunneling microscopy is
used to probe the molecules with different coverages on a HOPG substrate.
X-ray-induced photocurrent intensities are measured as a function of molecular
coverage on the sample allowing a correlation of the amount of La ions with the
photocurrent signal strength. X-ray absorption spectroscopy shows cogent M4,5
absorption edges of the lanthanum ion originated by the transitions from the
3d3/2 and 3d5/2 to 4f orbitals. X-ray absorption spectra measured in the
tunneling regime further reveal an X-ray excited tunneling current produced at
the M4,5 absorption edge of La ion down to the ultimate atomic limit at room
temperature.
In this study, we present a method for generating a synthetic gauge field in
origami metamaterials with continuously varying geometrical parameters. By
modulating the mass term in the Dirac equation linearly, we create a synthetic
gauge field in the vertical direction, which allows for the quantization of
Landau levels through the generated pseudomagnetic field. Furthermore, we
demonstrate the existence and robustness of the chiral zeroth Landau level. The
unique elastic snake state is realized using the coupling between the zeroth
and the first Landau levels. Our results, supported by theory and simulations,
establish a feasible framework for generating pseudomagnetic fields in origami
metamaterials with potential applications in waveguides and cloaking.
Symmetry breaking in quantum materials is of great importance and leads to
novel nonreciprocal charge transport. The topological insulator system provides
a unique platform to study nonreciprocal charge transport due to the exotic
surface state. But it is typically small in magnitude because the contributions
from the top and bottom surface of topological insulator are usually opposite.
Here, we report the observation of giant nonreciprocal charge transport
mediated by the quantum Hall state in intrinsic topological insulator
Sn-Bi1.1Sb0.9Te2S devices, which is attributed to the coexistence of quantum
Hall states and Dirac surface states. A giant nonreciprocal coefficient of up
to 2.26*10^5 A^-1 is found, because only a single surface of topological
insulator contributes to the nonreciprocal charge transport. Our work not only
reveals the intrinsic properties of nonreciprocal charge transport in
topological insulators, but also paves the way for future electronic devices.
The transport properties of electrons in graphene $p$-$n$ junction with
uniform Kekul\'e lattice distortion have been studied using the tight-binding
model and the Landauer-B\"uttiker formalism combined with the nonequilibrium
Green's function method. In the Kekul\'e-ordered graphene, the original $K$ and
$K^{\prime}$ valleys of the pristine graphene are folded together due to the
$\sqrt{3} \times \sqrt{3}$ enlargement of the primitive cell. When the valley
coupling breaks the chiral symmetry, special transport properties of Dirac
electrons exist in the Kekul\'e lattice. In the O-shaped Kekul\'e graphene
$p$-$n$ junction, Klein tunneling is suppressed, and only resonance tunneling
occurs. In the Y-shaped Kekul\'e graphene $p$-$n$ junction, the transport of
electrons is dominated by Klein tunneling. When the on-site energy modification
is introduced into the Y-shaped Kekul\'e structure, both Klein tunneling and
resonance tunneling occur, and the electron tunneling is enhanced. In the
presence of a strong magnetic field, the conductance of O-shaped and on-site
energy-modified Y-shaped Kekul\'e graphene $p$-$n$ junctions is non-zero due to
the occurrence of resonance tunneling. It is also found that the disorder can
enhance conductance, with conductance plateaus forming in the appropriate range
of disorder strength. The ideal plateau value is found only in the Kekul\'e-Y
system.
Electrochemical reactions represent essential processes in fundamental
chemistry that foster a wide range of applications. Although most
electrochemical reactions in bulk substances can be well described by the
classical Marcus-Gerischer charge transfer theory, the realistic reaction
character and mechanism in dimensionally confined systems remain unknown. Here,
we report the multiparametric survey on the kinetics of lateral photooxidation
in structurally identical WS2 and MoS2 monolayers, where electrochemical
oxidation occurs at the atomically thin monolayer edges. The oxidation rate is
correlated quantitatively with various crystallographic and environmental
parameters, including the density of reactive sites, humidity, temperature, and
illumination fluence. In particular, we observe distinctive reaction barriers
of 1.4 and 0.9 eV for the two structurally identical semiconductors and uncover
an unusual non-Marcusian charge transfer mechanism in these dimensionally
confined monolayers due to the limit in reactant supplies. A scenario of band
bending is proposed to explain the discrepancy in reaction barriers. These
results add important knowledge into the fundamental electrochemical reaction
theory in low-dimensional systems.
We propose a novel bound on the mimimum dissipation required in any
circumstances to transfer a certain amount of charge through any resistive
device. We illustrate it on the task of writing a logical 1 (encoded as a
prescribed voltage) into a capacitance, through various linear or nonlinear
devices. We show that, even though the celebrated Landauer bound (which only
applies to bit erasure) does not apply here, one can still formulate a "non-
Landauer" lower bound on dissipation, that crucially depends on the time budget
to perform the operation, as well as the average conductance of the driving
device. We compare our bound with empirical results reported in the literature
and realistic simulations of CMOS pass and transmission gates in decananometer
technology. Our non-Landauer bound turns out to be a quantitative benchmark to
assess the (non-)optimality of a writing operation.
Graphene oxide (GO) is one of the important functional materials. Large-scale
synthesis of it is very challenging. Following a simple cost-effective route,
large-scale GO was produced by mechanical (ball) milling, in air, of carbon
nanoparticles (CNPs) present in carbon soot in the present study. The thickness
of the GO layer was seen to decrease with an increase in milling time. Ball
milling provided the required energy to acquire the in-plane graphitic order in
the CNPs reducing the disorders in it. As the surface area of the layered
structure became more and more with the increase in milling time, more and more
oxygen of air got attached to the carbon in graphene leading to the formation
of GO. An increase in the time of the ball mill up to 5 hours leads to a
significant increase in the content of GO. Thus ball milling can be useful to
produce large-scale two-dimensional GO for a short time.
We propose a general framework for decoding quantum error-correcting codes
with generative modeling. The model utilizes autoregressive neural networks,
specifically Transformers, to learn the joint probability of logical operators
and syndromes. This training is in an unsupervised way, without the need for
labeled training data, and is thus referred to as pre-training. After the
pre-training, the model can efficiently compute the likelihood of logical
operators for any given syndrome, using maximum likelihood decoding. It can
directly generate the most-likely logical operators with computational
complexity $\mathcal O(2k)$ in the number of logical qubits $k$, which is
significantly better than the conventional maximum likelihood decoding
algorithms that require $\mathcal O(4^k)$ computation. Based on the pre-trained
model, we further propose refinement to achieve more accurately the likelihood
of logical operators for a given syndrome by directly sampling the stabilizer
operators. We perform numerical experiments on stabilizer codes with small code
distances, using both depolarizing error models and error models with
correlated noise. The results show that our approach provides significantly
better decoding accuracy than the minimum weight perfect matching and
belief-propagation-based algorithms. Our framework is general and can be
applied to any error model and quantum codes with different topologies such as
surface codes and quantum LDPC codes. Furthermore, it leverages the
parallelization capabilities of GPUs, enabling simultaneous decoding of a large
number of syndromes. Our approach sheds light on the efficient and accurate
decoding of quantum error-correcting codes using generative artificial
intelligence and modern computational power.
Chalcogen vacancies in transition metal dichalcogenides are widely
acknowledged as both donor dopants and as a source of disorder. The electronic
structure of sulphur vacancies in MoS2 however is still controversial, with
discrepancies in the literature pertaining to the origin of the in-gap features
observed via scanning tunneling spectroscopy (STS) on single sulphur vacancies.
Here we use a combination of scanning tunnelling microscopy (STM) and STS to
study embedded sulphur vacancies in bulk MoS2 crystals. We observe
spectroscopic features dispersing in real space and in energy, which we
interpret as tip position- and bias-dependent ionization of the sulphur vacancy
donor due to tip induced band bending (TIBB). The observations indicate that
care must be taken in interpreting defect spectra as reflecting in-gap density
of states, and may explain discrepancies in the literature.
Topological insulators are emerging materials with insulating bulk and
symmetry protected nontrivial surface states. One of the most fascinating
transport behaviors in a topological insulator is the quantized anomalous Hall
insulator, which has been observed inmagnetic-topological-insulator-based
devices. In this work, we report a successful doping of rare earth element Tb
into Bi$_{1.08}$Sb$_{0.9}$Te$_2$S topological insulator single crystals, in
which the Tb moments are antiferromagnetically ordered below ~10 K. Benefiting
from the in-bulk-gap Fermi level, transport behavior dominant by the
topological surface states is observed below ~ 150 K. At low temperatures,
strong Shubnikov-de Haas oscillations are observed, which exhibit 2D-like
behavior. The topological insulator with long range magnetic ordering in rare
earth doped Bi$_{1.08}$Sb$_{0.9}$Te$_2$S single crystal provides an ideal
platform for quantum transport studies and potential applications.
We report the synthesis of transition-metal-doped ferromagnetic elemental
single-crystal semiconductors with quantum oscillations using the physical
vapor transport method. The 7.7 atom% Cr-doped Te crystals (Cr_Te) show
ferromagnetism, butterfly-like negative magnetoresistance in the low
temperature (< 3.8 K) and low field (< 0.15 T) region, and high Hall mobility,
e.g., 1320 cm2 V-1 s-1 at 30 K and 350 cm2 V-1 s-1 at 300 K, implying that
Cr_Te crystals are ferromagnetic elemental semiconductors. When B // c // I,
the maximum negative MR is -27% at T = 20 K and B = 8 T. In the low temperature
semiconducting region, Cr_Te crystals show strong discrete scale invariance
dominated logarithmic quantum oscillations when the direction of the magnetic
field B is parallel to the [100] crystallographic direction and show Landau
quantization dominated Shubnikov-de Haas (SdH) oscillations for B // [210]
direction, which suggests the broken rotation symmetry of the Fermi pockets in
the Cr_Te crystals. The findings of coexistence of multiple quantum
oscillations and ferromagnetism in such an elemental quantum material may
inspire more study of narrow bandgap semiconductors with ferromagnetism and
quantum phenomena.
In this lecture note, we give a basic introduction to the rapidly developing
concepts of generalized symmetries, from the perspectives of both high energy
physics and condensed matter physics. In particular, we emphasize on the
(invertible) higher-form and higher-group symmetries. For the physical
applications, we discuss the geometric engineering of QFTs in string theory and
the symmetry-protected topological (SPT) phases in condensed matter physics.
The lecture note is based on a short course on generalized symmetries,
jointly given by Yi-Nan Wang and Qing-Rui Wang in Feb. 2023, which took place
at School of Physics, Peking University
(https://indico.ihep.ac.cn/event/18796/).
Studies of the formation of Landau levels based on the Schr\"odinger equation
for electrons constrained to curved surfaces have a long history. These include
as prime examples surfaces with constant positive and negative curvature, the
sphere [Phys. Rev. Lett. 51, 605 (1983)] and the pseudosphere [Annals of
Physics 173, 185 (1987)]. Now, topological insulators, hosting Dirac-type
surface states, provide a unique platform to experimentally examine such
quantum Hall physics in curved space. Hence, extending previous work we
consider solutions of the Dirac equation for the pseudosphere for both, the
case of an overall perpendicular magnetic field and a homogeneous coaxial,
thereby locally varying, magnetic field. For both magnetic-field
configurations, we provide analytical solutions for spectra and eigenstates.
For the experimentally relevant case of a coaxial magnetic field we find that
the Landau levels split and show a peculiar scaling $\propto B^{1/4}$, thereby
characteristically differing from the usual linear $B$ and $B^{1/2}$ dependence
of the planar Schr\"odinger and Dirac case, respectively. We compare our
analytical findings to numerical results that we also extend to the case of the
Minding surface.
Valley degrees of freedom in transition-metal dichalcogenides influence
thoroughly electron-phonon coupling and its nonequilibrium dynamics. We
conducted a first-principles study of the quantum kinetics of chiral phonons
following valley-selective carrier excitation with circularly-polarized light.
Our numerical investigations treat the ultrafast dynamics of electrons and
phonons on equal footing within a parameter-free ab-initio framework. We report
the emergence of valley-polarized phonon populations in monolayer MoS$_2$ that
can be selectively excited at either the K or K' valleys depending on the light
helicity. The resulting vibrational state is characterized by a distinctive
chirality, which lifts time-reversal symmetry of the lattice on transient
timescales. We show that chiral valley phonons can further lead to fingerprints
of vibrational dichroism detectable by ultrafast diffuse scattering and
persisting beyond 10 ps. The valley polarization of nonequilibrium phonon
populations could be exploited as information carrier, thereby extending the
paradigm of valleytronics to the domain of vibrational excitations.
Moir\'e materials have recently been established experimentally as a
highly-tunable condensed matter platform, facilitating the controlled
manipulation of band structures and interactions. In several of these moir\'e
materials, Dirac cones are present in the low-energy regime near the Fermi
level. Thus, fermionic excitations emerging in these materials close to the
Dirac cones have a linear dispersion relation near the Fermi surface as
massless relativistic Dirac fermions. Here, we study low-energy fermionic
excitations of moir\'e Dirac materials in the presence of a mass gap that may
be generated by symmetry breaking. Introducing a dynamical Fermi velocity
and/or time-dependent mass gap for the Dirac quasiparticles, we exhibit the
emergence of an analog of cosmological fermion pair production in terms of
observables such as the expected occupation number or two-point correlation
functions. We find that it is necessary and sufficient for quasiparticle
production that only the ratio between the mass gap and the Fermi velocity is
time-dependent. In this way, we establish that moir\'e Dirac materials can
serve as analog models for cosmological spacetime geometries, in particular,
for Friedmann-Lema\^itre-Robertson-Walker expanding cosmologies. We briefly
discuss possibilities for experimental realization.
We demonstrate the feasibility of Tensor Network simulations of non-Abelian
lattice gauge theories in two spatial dimensions, by focusing on a (minimally
truncated) SU(2) Yang-Mills model in Hamiltonian formulation, including
dynamical matter. Thanks to our sign-problem-free approach, we characterize the
phase diagram of the model at zero and finite baryon number, as a function of
the bare mass and color charge of the quarks. Already at intermediate system
sizes, we distinctly detect a liquid phase of quark-pair bound-state
quasi-particles (baryons), whose mass is finite towards the continuum limit.
Interesting phenomena arise at the transition boundary where color-electric and
color-magnetic terms are maximally frustrated: for low quark masses, we see
traces of potential deconfinement, while for high quark masses, we observe
signatures of a possible topological order.
Strange metals arise in a variety of platforms for strongly correlated
electrons, ranging from the cuprates, heavy fermions to flat band systems.
Motivated by recent experiments in kagome metals, we study a Hubbard model on a
kagome lattice whose noninteracting limit contains flat bands. A Kondo lattice
description is constructed, in which the degrees of freedom are exponentially
localized molecular orbitals. We identify an orbital-selective Mott transition
through an extended dynamical mean field theory of the effective model. The
transition describes a quantum critical point at which quasiparticles are
expected to be lost and strange metallicity emerges. Our theoretical work opens
up a new route for realizing beyond-Landau quantum criticality and emergent
quantum phases that it nucleates.
In this paper we analyze the band-structure of two-dimensional (2D) halide
perovskites by considering structures related to the simpler case of the
series, (BA)$_2$PbI$_4$, in which PbI$_4$ layers are intercalated with
butylammonium (BA=CH$_3$(CH$_2$)$_3$NH$_3$) organic ligands. We use
density-functional-theory (DFT) based calculations and tight-binding (TB)
models aiming to discover a simple description of the bands in the vicinity of
the valence-band maximum and the conduction-band minimum. We find that the
atomic orbitals of the butylammonium chains have negligible contribution to the
Bloch states which form the conduction and valence bands in near the Fermi
energy. Our calculations reveal a rather universal, i.e., independent of the
intercalating BA, rigid-band picture characteristic of the layered perovskite
``matrix''. Besides demonstrating the above conclusion, the main goal of this
paper is to find accurate TB models which capture the essential features of the
DFT bands near the Fermi energy. First, we ignore electron hopping along the
$c$-axis and the octahedral distortions and this increased symmetry halves the
Bravais-lattice unit-cell size and the Brillouin zone unfolds to a 45$^{\circ}$
rotated square and this allows some analytical handling of the 2D
TB-Hamiltonian. The Pb $6s$ and I $5s$ orbitals are far away from the Fermi
level and, thus, we integrate them out to obtain an effective model which only
includes hybridized Pb $6p$ and I $5p$ states. Our TB-based treatment a)
provides a good quantitative description of the DFT band-structure, b) helps us
conceptualize the complex electronic structure in the family of these materials
in a simple way and c) yields the one-body part to be combined with
appropriately screened electron interaction to describe many-body effects, such
as excitonic bound-states.
We derive an exact solution for the steady state of a setup where two
$XX$-coupled $N$-qubit spin chains (with possibly non-uniform couplings) are
subject to boundary Rabi drives, and common boundary loss generated by a
waveguide (either bidirectional or unidirectional). For a wide range of
parameters, this system has a pure entangled steady state, providing a means
for stabilizing remote multi-qubit entanglement without the use of squeezed
light. Our solution also provides insights into a single boundary-driven
dissipative $XX$ spin chain that maps to an interacting fermionic model. The
non-equilibrium steady state exhibits surprising correlation effects, including
an emergent pairing of hole excitations that arises from dynamically
constrained hopping. Our system could be implemented in a number of
experimental platforms, including circuit QED.
We present the exact diagonalization study of rotating Bose-condensed gas
interacting via finite-range Gaussian potential confined in a quasi-2D harmonic
trap. The system of many-body Hamiltonian matrix is diagonalized in given
subspaces of quantized total angular momentum to obtain the lowest-energy
eigenstate employing the beyond lowest-Landau-level approximation. In the
co-rotating frame, the quantum mechanical stability of angular momentum states
is discussed for the existence of phase transition between the stable states of
interacting system. Thereby analyzing the von Neumann entanglement entropy and
degree of condensation provide the information about quantum phase correlation
in the many-body states. Calculating the conditional probability distribution,
we further probe the internal structure of quantum mechanically stable and
unstable states. Much emphasis is put on finding the spatial correlation of
bosonic atoms in the rotating system for the formation and entry of singly
quantized vortices, and then organizing into canonical polygons with and
without a central vortex at the trap center. Results are summarized in the form
of a movie depicting the vortex patterns having discrete p-fold rotational
symmetry with $p = 2,3,4,5,6$.
We study inhomogeneous 1+1-dimensional quantum many-body systems described by
Tomonaga-Luttinger-liquid theory with general propagation velocity and
Luttinger parameter varying smoothly in space, equivalent to an inhomogeneous
compactification radius for free boson conformal field theory. This model
appears prominently in low-energy descriptions, including for trapped
ultra-cold atoms, while here we present an application to quantum Hall edges
with inhomogeneous interactions. The dynamics is shown to be governed by a pair
of coupled continuity equations identical to inhomogeneous Dirac-Bogoliubov-de
Gennes equations with a local gap and solved by analytical means. We obtain
their exact Green's functions and scattering matrix using a Magnus expansion,
which generalize previous results for conformal interfaces and quantum wires
coupled to leads. Our results explicitly describe the late-time evolution
following quantum quenches, including inhomogeneous interaction quenches, and
Andreev reflections between coupled quantum Hall edges, revealing a remarkably
universal dependence on details at stationarity or at late times out of
equilibrium.
Using a general framework, interaction potentials between chiral magnetic
solitons in a planar system with a tilted external magnetic field are
calculated analytically in the limit of large separation. The results are
compared to previous numerical results for solitons with topological charge
$\pm 1$. A key feature of the calculation is the interpretation of
Dzyaloshinskii-Moriya interaction (DMI) as a background $SO(3)$ gauge field. In
a tilted field, this leads to a $U(1)$-gauged version of the usual equation for
spin excitations, leading to a distinctive oscillating interaction profile. We
also obtain predictions for skyrmion stability in a tilted field which closely
match numerical observations.
In this letter, we provide experimental evidence of the time-reversal
symmetric Hall effect in a mesoscopic system, namely high-mobility
graphene/WSe$_2$ heterostructures. This linear, dissipative Hall effect, whose
sign depends on the sign of the charge carriers, persists up to room
temperature. The magnitude and the sign of the Hall signal can be tuned using
an external perpendicular electric field. Our joint experimental and
theoretical study establishes that the strain induced by lattice mismatch, or
angle inhomogeneity, produces anisotropic bands in graphene while
simultaneously breaking the inversion symmetry. The band anisotropy and reduced
spatial symmetry lead to the appearance of a time-reversal symmetric Hall
effect. Our study establishes graphene-transition metal dichalcogenide-based
heterostructures as an excellent platform for studying the effects of broken
symmetry on the physical properties of band-engineered two-dimensional systems.
The Weyl semimetal CeAlGe is a promising material to study nontrivial
topologies in real and momentum space due to the presence of a topological
magnetic phase. Our results at ambient pressure show that the electronic
properties of CeAlGe are extremely sensitive to small stoichiometric
variations. In particular, the topological Hall effect (THE) present in CeAlGe
is absent in some samples of almost identical chemical composition. The
application of external pressure favors the antiferromagnetic ground state. It
also induces a THE where it was not visible at ambient pressure. Furthermore, a
small pressure is sufficient to drive the single region of the THE in magnetic
fields into two different ones. Our results reveal an extreme sensitivity of
the electronic properties of CeAlGe to tiny changes in its chemical
composition, leading to a high tunability by external stimuli. We can relate
this sensitivity to a shift in the Fermi level and to domain walls.
We investigate the second spectrum of charge carrier density fluctuations in
graphene within the McWorther model, where noise is induced by electron traps
in the substrate. Within this simple picture, we obtain a closed-form
expression including both Gaussian and non-Gaussian fluctuations. We show that
a very extended distribution of switching rates of the electron traps in the
substrate leads to a carrier density power spectrum with a non-trivial
structure on the scale of the measurement bandwidth. This explains the
appearance of a $1/f$ component in the Gaussian part of the second spectrum,
which adds up to the expected frequency-independent term. Finally, we find that
the non-Gaussian part of the second spectrum can become quantitatively relevant
by approaching extremely low temperatures.
We demonstrate the possibility of using time-space crystalline structures to
simulate eight-dimensional systems based on only two physical dimensions. A
suitable choice of system parameters allows us to obtain a gapped energy
spectrum, making topological effects become relevant. The nontrivial topology
of the system is evinced by considering the adiabatic state pumping along
temporal and spatial crystalline directions. Analysis of the system is
facilitated by rewriting the system Hamiltonian in a tight-binding form,
thereby putting space, time, and the additional synthetic dimensions on an
equal footing.
The composite particle duality extends the notions of both flux attachment
and statistical transmutation in spacetime dimensions beyond 2+1$\text{D}$. It
constitutes an exact correspondence that can be understood either as a
theoretical framework or as a dynamical physical mechanism. The immediate
implication of the duality is that an interacting quantum system in arbitrary
dimensions can experience a modification of its statistical properties if
coupled to a certain gauge field. In other words, commutation relations of
quantum fields can be effectively modified by a dynamical physical process. For
instance, an originally bosonic quantum fluid in d spatial dimensions can
feature composite fermionic (or anyonic) excitations when coupled to a
statistical gauge field. We compute the explicit form of the aforementioned
synthetic gauge fields in $\text{D} \le 3 + 1$. This opens the door to a new
realm of topological phases across dimensions both in lattice and continuum
systems.
We performed spin-, time- and angle-resolved extreme ultraviolet
photoemission spectroscopy (STARPES) of excitons prepared by photoexcitation of
inversion-symmetric 2H-WSe$_2$ with circularly polarized light. The very short
probing depth of XUV photoemission permits selective measurement of
photoelectrons originating from the top-most WSe$_2$ layer, allowing for direct
measurement of hidden spin polarization of bright and momentum-forbidden dark
excitons. Our results reveal efficient chiroptical control of bright excitons'
hidden spin polarization. Following optical photoexcitation, intervalley
scattering between nonequivalent K-K' valleys leads to a decay of bright
excitons' hidden spin polarization. Conversely, the ultrafast formation of
momentum-forbidden dark excitons acts as a local spin polarization reservoir,
which could be used for spin injection in van der Waals heterostructures
involving multilayer transition metal dichalcogenides.
The topology of the Brillouin zone, foundational in topological physics, is
always assumed to be a torus. We theoretically report the construction of
Brillouin real projective plane ($\mathrm{RP}^2$) and the appearance of
quadrupole insulating phase, which are enabled by momentum-space nonsymmorphic
symmetries stemming from $\mathbb{Z}_2$ synthetic gauge fields. We show that
the momentum-space nonsymmorphic symmetries quantize bulk polarization and
Wannier-sector polarization nonlocally across different momenta, resulting in
quantized corner charges and an isotropic binary bulk quadrupole phase diagram,
where the phase transition is triggered by a bulk energy gap closing. Under
open boundary conditions, the nontrivial bulk quadrupole phase manifests either
trivial or nontrivial edge polarization, resulting from the violation of
momentum-space nonsymmorphic symmetries under lattice termination. We present a
concrete design for the $\mathrm{RP}^2$ quadrupole insulator based on acoustic
resonator arrays and discuss its feasibility in optics, mechanics, and
electrical circuits. Our results show that deforming the Brillouin manifold
creates opportunities for realizing high-order band topology.
In this study, we investigate the behavior of vortex singularities in the
phase of the Green's function of a general non-interacting fermionic lattice
model in three dimensions after an instantaneous quench. We find that the full
set of vortices form one-dimensional dynamical objects, which we call vortex
loops. The number of such vortex loops can be interpreted as a quantized order
parameter that distinguishes between different non-equilibrium phases. We show
that changes in this order parameter are related to dynamical quantum phase
transitions (DQPTs). Our results are applicable to general lattice models in
three dimensions. For concreteness, we present them in the context of a simple
two-band Weyl semimetal. We also show that the vortex loops survive in weakly
interacting systems. Finally, we observe that vortex loops can form complex
dynamical patterns in momentum space due to the existence of band touching Weyl
nodes. Our findings provide valuable insights for developing definitions of
dynamical order parameters in non-equilibrium systems.
By using biorthogonal bases, we construct a complete framework for
biorthogonal dynamical quantum phase transitions in non-Hermitian systems. With
the help of associated state which is overlooked previously, we define the
automatically normalized biorthogonal Loschmidt echo. This approach is capable
of handling arbitrary non-Hermitian systems with complex eigenvalues, which
naturally eliminates the negative value of Loschmidt rate obtained without the
biorthogonal bases. Taking the non-Hermitian Su-Schrieffer-Heeger model as a
concrete example, a peculiar $1/2$ change in biorthogonal dynamical topological
order parameter, which is beyond the traditional dynamical quantum phase
transitions is observed. We also find the periodicity of biorthogonal dynamical
quantum phase transitions depend on whether the two-level subsystem at the
critical momentum oscillates or reaches a steady state.
Quantum anomalous Hall (QAH) insulators with high Chern number host multiple
dissipationless chiral edge channels, which are of fundamental interest and
promising for applications in spintronics and quantum computing. However, only
a limited number of high-Chern-number QAH insulators have been reported to
date. Here, we propose a dynamic approach for achieving high-Chern-number QAH
phases in periodically driven two-dimensional higher-order topological
insulators (HOTIs).In particular, we consider two representative kinds of HOTIs
which are characterized by a quantized quadruple moment and the second
Stiefel-Whitney number, respectively. Using the Floquet formalism for
periodically driven systems, we demonstrate that QAH insulators with tunable
Chern number up to four can be achieved. Moreover, we show by first-principles
calculations that the monolayer graphdiyne, a realistic HOTI, is an ideal
material candidate. Our work not only establishes a strategy for designing
high-Chern-number QAH insulators in periodically driven HOTIs, but also
provides a powerful approach to investigate exotic topological states in
nonequilibrium cases.
The chiral edge modes of a topological superconductor can transport fermionic
quasiparticles, with Abelian exchange statistics, but they can also transport
non-Abelian anyons: Majorana zero-modes bound to a {\pi}-phase domain wall that
propagates along the boundary. Such an edge vortex is injected by the
application of an h/2e flux bias over a Josephson junction. Existing
descriptions of the injection process rely on the instantaneous scattering
approximation of the adiabatic regime, where the internal dynamics of the
Josephson junction is ignored. Here we go beyond that approximation in a
time-dependent many-body simulation of the injection process, followed by a
braiding of the mobile edge vortex with an immobile Abrikosov vortex in the
bulk of the superconductor. Our simulation sheds light on the properties of the
Josephson junction needed for a successful implementation of a flying Majorana
qubit.

Date of feed: Wed, 19 Jul 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]+) **Twice Hidden String Order and Competing Phases in the Spin-1/2 Kitaev-Gamma Ladder. (arXiv:2307.08731v1 [cond-mat.str-el])**

Erik S. Sørensen, Hae-Young Kee

**Disordered $\mathcal{N} = (2, 2)$ Supersymmetric Field Theories. (arXiv:2307.08742v1 [hep-th])**

Chi-Ming Chang, Xiaoyang Shen

**Unconventional superfluidity and quantum geometry of topological bosons. (arXiv:2307.08748v1 [cond-mat.quant-gas])**

Ilya Lukin, Andrii Sotnikov, Alexander Kruchkov

**Topological properties of a non-Hermitian quasi-one-dimensional chain with a flat band. (arXiv:2307.08754v1 [cond-mat.mes-hall])**

C.Martínez-Strasser, M.A.J.Herrera, G.Palumbo, F.K.Kunst, D.Bercioux

**Decoding chirality in circuit topology of a self entangled chain through braiding. (arXiv:2307.08805v1 [cond-mat.soft])**

Jonas Berx, Alireza Mashaghi

**Superfluid phase transition of nanoscale-confined helium-3. (arXiv:2307.08808v1 [cond-mat.supr-con])**

Canon Sun, Adil Attar, Igor Boettcher

**MBE growth of axion insulator candidate EuIn2As2. (arXiv:2307.08831v1 [cond-mat.mtrl-sci])**

Muhsin Abdul Karim, Jiashu Wang, David Graf, Kota Yoshimura, Sara Bey, Tatyana Orlova, Maksym Zhukovskyi, Xinyu Liu, Badih A. Assaf

**X-ray Spectroscopy of a Rare-Earth Molecular System Measured at the Single Atom Limit in Room Temperature. (arXiv:2307.08862v1 [cond-mat.mtrl-sci])**

Sarah Wieghold, Nozomi Shirato, Xinyue Cheng, Kyaw Zin Latt, Daniel Trainer, Richard Sottie, Daniel Rosenmann, Eric Masson, Volker Rose, Saw Wai Hla

**Elastic chiral Landau level and snake states in origami metamaterials. (arXiv:2307.08887v1 [cond-mat.soft])**

Shuaifeng Li, Panayotis G.Kevrekidis, Jinkyu Yang

**Observation of giant nonreciprocal charge transport from quantum Hall edge states of single surface in topological insulator. (arXiv:2307.08917v1 [cond-mat.mes-hall])**

Chunfeng Li, Shuai Zhang, Zhe Ying, Boyuan Wei, Zheng Dai, Fengyi Guo, Rui Wang, Wei Chen, Xuefeng Wang, Fengqi Song

**The transport properties of Kekul\'e-ordered graphene $p$-$n$ junctions. (arXiv:2307.08932v1 [cond-mat.mes-hall])**

Peipei Zhang, Chao Wang, Yu-Xian Li, Lixue Zhai, Juntao Song

**Oxidation kinetics and non-Marcusian charge transfer in dimensionally confined semiconductors. (arXiv:2307.08957v1 [cond-mat.mtrl-sci])**

Ning Xu, Li Shi, Xudong Pei, Weiyang Zhang, Jian Chen, Zheng Han, Paolo Samorì, Jinlan Wang, Peng Wang, Yi Shi, Songlin Li

**The non-Landauer Bound for the Dissipation of Bit Writing Operation. (arXiv:2307.08993v1 [cond-mat.stat-mech])**

Léopold Van Brandt, Jean-Charles Delvenne

**Large scale synthesis of 2D graphene oxide by mechanical milling of 3D carbon nanoparticles in air. (arXiv:2307.09011v1 [cond-mat.mtrl-sci])**

Sandip Das, Subhamay Pramanik, Sumit Mukherjee, Tatan Ghosh, Rajib Nath, Probodh K. Kuiri

**qecGPT: decoding Quantum Error-correcting Codes with Generative Pre-trained Transformers. (arXiv:2307.09025v1 [quant-ph])**

Hanyan Cao, Feng Pan, Yijia Wang, Pan Zhang

**Defects, band bending and ionization rings in MoS2. (arXiv:2307.09046v1 [cond-mat.mtrl-sci])**

Iolanda Di Bernardo, James Blyth, Liam Watson, Kaijian Xing, Yi-Hsun Chen, Shao-Yu Chen, Mark T. Edmonds, Michael S. Fuhrer

**Antiferromagnetic topological insulating state in Tb$_{0.02}$Bi$_{1.08}$Sb$_{0.9}$Te$_2$S single crystals. (arXiv:2307.09062v1 [cond-mat.mtrl-sci])**

Lei Guo, Weiyao Zhao, Qile Li, Meng Xu, Lei Chen, Abdulhakim Bake, Thi-Hai-Yen Vu, Yahua He, Yong Fang, David Cortie, Sung-Kwan Mo, Mark Edmonds, Xiaolin Wang, Shuai Dong, Julie Karel, Ren-Kui Zheng

**Coexistence of Logarithmic and SdH Quantum Oscillations in Ferromagnetic Cr-doped Tellurium Single Crystals. (arXiv:2307.09139v1 [cond-mat.mtrl-sci])**

Shu-Juan Zhang, Lei Chen, Shuang-Shuang Li, Ying Zhang, Jian-Min Yan, Fang Tang, Yong Fang, Lin-Feng Fei, Weiyao Zhao, Julie Karel, Yang Chai, Ren-Kui Zheng

**Lecture Notes on Generalized Symmetries and Applications. (arXiv:2307.09215v1 [hep-th])**

Ran Luo, Qing-Rui Wang, Yi-Nan Wang

**Dirac Landau levels for surfaces with constant negative curvature. (arXiv:2307.09221v1 [cond-mat.mes-hall])**

Maximilian Fürst, Denis Kochan, Cosimo Gorini, Klaus Richter

**Vibrational dichroism of chiral valley phonons. (arXiv:2307.09280v1 [cond-mat.mes-hall])**

Yiming Pan, Fabio Caruso

**Analog of cosmological particle production in moir\'e Dirac materials. (arXiv:2307.09299v1 [cond-mat.mes-hall])**

Mireia Tolosa-Simeón, Michael M. Scherer, Stefan Floerchinger

**(2+1)D SU(2) Yang-Mills Lattice Gauge Theory at finite density via tensor networks. (arXiv:2307.09396v1 [hep-lat])**

Giovanni Cataldi, Giuseppe Magnifico, Pietro Silvi, Simone Montangero

**Metallic quantum criticality enabled by flat bands in a kagome lattice. (arXiv:2307.09431v1 [cond-mat.str-el])**

Lei Chen, Fang Xie, Shouvik Sur, Haoyu Hu, Silke Paschen, Jennifer Cano, Qimiao Si

**Towards understanding the electronic structure of the simpler members of two-dimensional halide-perovskites. (arXiv:2307.09464v1 [cond-mat.mtrl-sci])**

Efstratios Manousakis

**Exact results for a boundary-driven double spin chain and resource-efficient remote entanglement stabilization. (arXiv:2307.09482v1 [quant-ph])**

Andrew Lingenfelter, Mingxing Yao, Andrew Pocklington, Yu-Xin Wang, Abdullah Irfan, Wolfgang Pfaff, Aashish A. Clerk

**Novel phases in rotating Bose-condensed gas: vortices and quantum correlation. (arXiv:2206.14543v3 [cond-mat.quant-gas] UPDATED)**

Mohd. Imran, M. A. H. Ahsan

**Exact Dirac-Bogoliubov-de Gennes Dynamics for Inhomogeneous Quantum Liquids. (arXiv:2208.14467v2 [cond-mat.stat-mech] UPDATED)**

Per Moosavi

**Stability and asymptotic interactions of chiral magnetic skyrmions in a tilted magnetic field. (arXiv:2211.08017v2 [cond-mat.mes-hall] UPDATED)**

Bruno Barton-Singer, Bernd J. Schroers

**Observation of time-reversal symmetric Hall effect in graphene-WSe2 heterostructures at room temperature. (arXiv:2301.01912v3 [cond-mat.mes-hall] UPDATED)**

Priya Tiwari, Divya Sahani, Atasi Chakraborty, Kamal Das, Kenji Watanabe, Takashi Taniguchi, Amit Agarwal, Aveek Bid

**Topological Hall effect in CeAlGe. (arXiv:2303.12144v2 [cond-mat.str-el] UPDATED)**

M. M. Piva, J. C. Souza, G. A. Lombardi, K. R. Pakuszewski, C. Adriano, P. G. Pagliuso, M. Nicklas

**Second spectrum of charge carrier density fluctuations in graphene due to trapping/detrapping processes. (arXiv:2305.07628v2 [cond-mat.mes-hall] UPDATED)**

Francesco M. D. Pellegrino, Giuseppe Falci, Elisabetta Paladino

**Eight-dimensional topological systems simulated using time-space crystalline structures. (arXiv:2305.07668v2 [cond-mat.quant-gas] UPDATED)**

Yakov Braver, Egidijus Anisimovas, Krzysztof Sacha

**The Composite Particle Duality: A New Class of Topological Quantum Matter. (arXiv:2306.00825v2 [cond-mat.str-el] UPDATED)**

Gerard Valentí-Rojas, Joel Priestley, Patrik Öhberg

**Ultrafast Hidden Spin Polarization Dynamics of Bright and Dark Excitons in 2H-WSe$_2$. (arXiv:2306.03610v2 [cond-mat.mes-hall] UPDATED)**

Mauro Fanciulli, David Bresteau, Jérome Gaudin, Shuo Dong, Romain Géneaux, Thierry Ruchon, Olivier Tcherbakoff, Ján Minár, Olivier Heckmann, Maria Christine Richter, Karol Hricovini, Samuel Beaulieu

**Synthetic gauge fields enable high-order topology on Brillouin real projective plane. (arXiv:2306.15477v2 [cond-mat.mes-hall] UPDATED)**

Jinbing Hu, Songlin Zhuang, Yi Yang

**Vortex loop dynamics and dynamical quantum phase transitions in 3D fermion matter. (arXiv:2307.02985v2 [cond-mat.stat-mech] UPDATED)**

Arkadiusz Kosior, Markus Heyl

**Biorthogonal dynamical quantum phase transitions in non-Hermitian systems. (arXiv:2307.02993v2 [quant-ph] UPDATED)**

Yecheng Jing, Jian-Jun Dong, Yu-Yu Zhang, Zi-Xiang Hu

**Photoinduced High-Chern-Number Quantum Anomalous Hall Effect from Higher-Order Topological Insulators. (arXiv:2307.07116v2 [cond-mat.mes-hall] UPDATED)**

Xiaolin Wan, Zhen Ning, Dong-Hui Xu, Baobing Zheng, Rui Wang

**Dynamical simulation of the injection of vortices into a Majorana edge mode. (arXiv:2307.07447v2 [cond-mat.mes-hall] UPDATED)**

I. M. Flor, A. Donis Vela, C. W. J. Beenakker, G. Lemut

Found 8 papers in prb The triple phase transitions or simultaneous transitions of three different phases, namely, topological, parity-time $(\mathcal{P}\mathcal{T})$ symmetry breaking, and metal-insulator transitions, are observed in an extension of the $\mathcal{P}\mathcal{T}$ symmetric non-Hermitian Aubry-André-Harper … We study martensitic transformation behavior by considering the coupling of volumetric strain and the transformation strain in a group-subgroup transformation within a Ginzburg-Landau framework. Nonthermoelastic features, including large residual strain, large thermal hysteresis, and incomplete tran… We characterize the magnetic ground state of the topological kagome metal ${\mathrm{GdV}}_{6}{\mathrm{Sn}}_{6}$ via resonant x-ray diffraction. Previous magnetoentropic studies of ${\mathrm{GdV}}_{6}{\mathrm{Sn}}_{6}$ suggested the presence of a modulated magnetic order distinct from the ferromagnet… Pair-density waves (PDWs) are superconducting states that spontaneously break translation symmetry in systems with time-reversal symmetry (TRS). Evidence for PDWs has been seen in several recent experiments, as well as in the pseudogap regime in cuprates. Theoretical understanding of PDWs has been l… Interactions are crucial for topological phenomena in bosonic systems. Some condenses bosons, like helium-4, into a symmetry breaking phase. Instead, the authors construct here exactly solvable models of interacting bosons that preserve charge conservation. They focus on the ${E}_{8}$ bosonic integer quantum Hall state, and show that the intrinsic ${E}_{8}$ symmetry allows the emergence of fractional topological phases of bosons. They detail charge and statistics of the excitations of the resulting fractional phases. We derive the effective $\mathbf{k}·\mathbf{p}$ Hamiltonian for an electron in monolayer ${T}^{′}\text{−}{\mathrm{MoS}}_{2}$ near the Fermi level in the presence of spin-orbit coupling and a perpendicular electric field. The $4×4\phantom{\rule{4pt}{0ex}}\mathbf{k}·\mathbf{p}$ Hamiltonian is capable … Topological insulators hold great promise for dissipationless transport devices due to the robust gapless states inside the insulating bulk gap. So far, several generations of topological insulators have been theoretically predicted and experimentally confirmed, most of them based on three- or two-d… Forty years ago, Laughlin explained the newly discovered fractional quantum Hall effect by proposing his famous wave function. He predicted the existence of anyons, particles with fractional charge, obeying fractional statistics. The fractional charge was confirmed almost thirty years ago, while the fractional statistics was observed only a few years back. In this paper, the authors focus on yet another fundamental property of the anyons, namely their spin. They derive a “spin-statistics relation” for anyons in fractional quantum Hall states, directly from the microscopic theory. This relation is a generalization of the fundamental “spin-statistics relation” that all ordinary particles obey.

Date of feed: Wed, 19 Jul 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]+) **Topological triple phase transition in non-Hermitian quasicrystals with complex asymmetric hopping**

Shaina Gandhi and Jayendra N. Bandyopadhyay

Author(s): Shaina Gandhi and Jayendra N. Bandyopadhyay

[Phys. Rev. B 108, 014204] Published Tue Jul 18, 2023

**Nonthermoelastic martensitic features in ideal martensites due to volume effects**

Yuanchao Yang, Yangyang Xu, Yumei Zhou, Xiangdong Ding, Jun Sun, Turab Lookman, and Dezhen Xue

Author(s): Yuanchao Yang, Yangyang Xu, Yumei Zhou, Xiangdong Ding, Jun Sun, Turab Lookman, and Dezhen Xue

[Phys. Rev. B 108, 024102] Published Tue Jul 18, 2023

**Incommensurate magnetic order in the ${\mathbb{Z}}_{2}$ kagome metal ${\mathrm{GdV}}_{6}{\mathrm{Sn}}_{6}$**

Zach Porter, Ganesh Pokharel, Jong-Woo Kim, Phillip J. Ryan, and Stephen D. Wilson

Author(s): Zach Porter, Ganesh Pokharel, Jong-Woo Kim, Phillip J. Ryan, and Stephen D. Wilson

[Phys. Rev. B 108, 035134] Published Tue Jul 18, 2023

**Triplet pair density wave superconductivity on the $π$-flux square lattice**

Daniel Shaffer and Luiz H. Santos

Author(s): Daniel Shaffer and Luiz H. Santos

[Phys. Rev. B 108, 035135] Published Tue Jul 18, 2023

**Partial fillings of the bosonic ${E}_{8}$ quantum Hall state**

Pak Kau Lim, Michael Mulligan, and Jeffrey C. Y. Teo

Author(s): Pak Kau Lim, Michael Mulligan, and Jeffrey C. Y. Teo

[Phys. Rev. B 108, 035136] Published Tue Jul 18, 2023

**Effective $\mathbf{k}·\mathbf{p}$ model of monolayer $1{T}^{′}\text{−}{\mathrm{MoS}}_{2}$ under perpendicular electric field**

Ma Zhou, Sheng-bin Yu, An-hua Huang, Li Wang, and Kai Chang

Author(s): Ma Zhou, Sheng-bin Yu, An-hua Huang, Li Wang, and Kai Chang

[Phys. Rev. B 108, 035412] Published Tue Jul 18, 2023

**Strain-dependent electronic and mechanical properties in one-dimensional topological insulator ${\mathrm{Nb}}_{4}{\mathrm{SiTe}}_{4}$**

Siyuan Liu, Huabing Yin, and Peng-Fei Liu

Author(s): Siyuan Liu, Huabing Yin, and Peng-Fei Liu

[Phys. Rev. B 108, 045411] Published Tue Jul 18, 2023

**Spin-statistics relation for quantum Hall states**

Alberto Nardin, Eddy Ardonne, and Leonardo Mazza

Author(s): Alberto Nardin, Eddy Ardonne, and Leonardo Mazza

[Phys. Rev. B 108, L041105] Published Tue Jul 18, 2023

Found 1 papers in prl We model interactions following the Sachdev-Ye-Kitaev (SYK) framework in disordered graphene flakes up to 300 000 atoms in size ($∼100\text{ }\text{ }\mathrm{nm}$ in diameter) subjected to an out-of-plane magnetic field $B$ of 5–20 Tesla within the tight-binding formalism. We investigate two sources…

Date of feed: Wed, 19 Jul 2023 03:17:05 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]+) **Engineering SYK Interactions in Disordered Graphene Flakes under Realistic Experimental Conditions**

Marta Brzezińska, Yifei Guan, Oleg V. Yazyev, Subir Sachdev, and Alexander Kruchkov

Author(s): Marta Brzezińska, Yifei Guan, Oleg V. Yazyev, Subir Sachdev, and Alexander Kruchkov

[Phys. Rev. Lett. 131, 036503] Published Tue Jul 18, 2023

Found 2 papers in nano-lett

Date of feed: Tue, 18 Jul 2023 13:06:36 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]+) **[ASAP] Giant and Tunable Out-of-Plane Spin Polarization of Topological Antimonene**

Polina M. Sheverdyaeva, Conor Hogan, Gustav Bihlmayer, Jun Fujii, Ivana Vobornik, Matteo Jugovac, Asish K. Kundu, Sandra Gardonio, Zipporah Rini Benher, Giovanni Di Santo, Sara Gonzalez, Luca Petaccia, Carlo Carbone, and Paolo MorasNano LettersDOI: 10.1021/acs.nanolett.3c00153

**[ASAP] Dirac Half-Semimetallicity and Antiferromagnetism in Graphene Nanoribbon/Hexagonal Boron Nitride Heterojunctions**

Nikita V. Tepliakov, Ruize Ma, Johannes Lischner, Efthimios Kaxiras, Arash A. Mostofi, and Michele PizzocheroNano LettersDOI: 10.1021/acs.nanolett.3c01940

Found 1 papers in acs-nano

Date of feed: Tue, 18 Jul 2023 13:03:24 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]+) **[ASAP] Mobility Enhancement of Strained MoS2 Transistor on Flat Substrate**

Yang Chen, Donglin Lu, Lingan Kong, Quanyang Tao, Likuan Ma, Liting Liu, Zheyi Lu, Zhiwei Li, Ruixia Wu, Xidong Duan, Lei Liao, and Yuan LiuACS NanoDOI: 10.1021/acsnano.3c03626

Found 1 papers in sci-rep Scientific Reports, Published online: 18 July 2023; doi:10.1038/s41598-023-38687-5**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]+)

Found 1 papers in nat-comm **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]+) **Topotactic fabrication of transition metal dichalcogenide superconducting nanocircuits**

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