Found 35 papers in cond-mat In the present work, first-principles calculations based on the density
functional theory (DFT), GW approximation and Bethe-Salpeter equation (BSE) are
performed to study the electronic and optical properties of penta-graphene (PG)
monolayer. The results indicated that PG is a semiconductor with an indirect
band gap of approximately 2.32 eV at the DFT- GGA level. We found that the
utilization of the GW approximation based on many-body perturbation theory led
to an increase in the band gap, resulting in a quasi-direct gap of 5.35 eV.
Additionally, we employed the G0W0 - RP A and G0W0 - BSE approximations to
calculate the optical spectra in the absence and in the presence of
electron-hole interaction, respectively. The results demonstrated that the
inclusion of electron-hole interaction caused a red-shift of the absorption
spectrum towards lower energies compared to the spectrum obtained from the G0W0
- RP A approximation. With the electron-hole interaction, it is found that the
optical absorption spectra are dominated by the first bound exciton with a
significant binding energy 3.07 eV. The study concluded that the PG monolayer,
with a wider band gap and enhanced excitonic effects, holds promise as a
suitable candidate for the design and fabrication of optoelectronic components.
In recent breakthrough experiments, twisted moir\'e layers of transition
metal dichalcogenides are found to manifest both integer (IQAHE) and fractional
(FQAHE) quantum anomalous Hall effects in zero applied magnetic field because
of the underlying flat band topology and spontaneous breaking of the time
reversal invariance. In the current work, we critically analyze the
experimental values of the quantized conductance in each case to emphasize the
role of disorder in the problem, pointing out that obtaining accurate quantized
conductance in future experiments would necessitate better contacts and lower
disorder.
We study the effective low-energy fermionic theory of the Kondo-Kitaev model
to leading order in the Kondo coupling. Our main goal is to understand the
nature of the superconducting instability induced in the proximate metal due to
its coupling to spin fluctuations of the spin liquid. The special combination
of the low-energy modes of a graphene-like metal and the form of the
interaction induced by the Majorana excitations of the spin liquid furnish
chiral superconducting order with $p_x + \mathrm{i} p_y$ symmetry. Computing
its response to a $\mathrm{U}(1)$ gauge field moreover shows that this
superconducting state is topologically non-trivial, characterized by a first
Chern number of $\pm 2$.
A major objective of the strong ongoing drive to realize quantum simulators
of gauge theories is achieving the capability to probe collider-relevant
physics on them. In this regard, a highly pertinent and sought-after
application is the controlled collisions of elementary and composite particles,
as well as the scattering processes in their wake. Here, we propose
particle-collision experiments in a cold-atom quantum simulator for a $1+1$D
$\mathrm{U}(1)$ lattice gauge theory with a tunable topological $\theta$-term,
where we demonstrate an experimentally feasible protocol to impart momenta to
elementary (anti)particles and their meson composites. We numerically benchmark
the collisions of moving wave packets for both elementary and composite
particles, uncovering a plethora of rich phenomena, such as oscillatory string
dynamics in the wake of elementary (anti)particle collisions due to
confinement. We also probe string inversion and entropy production processes
across Coleman's phase transition through far-from-equilibrium quenches. We
further demonstrate how collisions of composite particles unveil their internal
structure. Our work paves the way towards the experimental investigation of
collision dynamics in state-of-the-art quantum simulators of gauge theories,
and sets the stage for microscopic understanding of collider-relevant physics
in these platforms.
Dirac fluids - interacting systems obeying particle-hole symmetry and Lorentz
invariance - are among the simplest hydrodynamic systems; they have also been
studied as effective descriptions of transport in strongly interacting Dirac
semimetals. Direct experimental signatures of the Dirac fluid are elusive, as
its charge transport is diffusive as in conventional metals. In this paper we
point out a striking consequence of fluctuating relativistic hydrodynamics: the
full counting statistics (FCS) of charge transport is highly non-gaussian. We
predict the exact asymptotic form of the FCS, which generalizes a result
previously derived for certain interacting integrable systems. A consequence is
that, starting from quasi-one dimensional nonequilibrium initial conditions,
charge noise in the hydrodynamic regime is parametrically enhanced relative to
that in conventional diffusive metals.
We have measured magnetic torque on a T${_N}$ = 7 K single crystal of
${\alpha}$-RuCl${_3}$ , as a function of the field angle in the ab-plane,
focusing on temperatures between 2 and 20 K and fields from 0 to 9 T. We find a
rich spectrum of signals, many of which can be classified by their angular
periodicity. The sample shows an oscillation with a period of 180$^{\circ}$
(i.e. two-fold periodicity) which we argue is due to residual strain within the
crystal, rather than being intrinsic. In addition, within the magnetically
ordered zigzag phase there is a 60$^{\circ}$ period (i.e. six-fold) sawtooth
pattern, which can be explained by reorientation of the zigzag domains as the
crystal rotates in the applied field. Suppressing the zigzag order with an
applied field above ${\sim}$ 8 T at low temperature, a six-fold sinusoidal
signal remains, suggesting that there is fluctuating zigzag order in the
putative field-induced quantum spin liquid state. Finally, our key finding is a
sharp, step-like feature that appears at low temperature for fields just above
the zigzag phase boundary, at the so-called B2-axes. This is similar to
theoretically predicted behaviour for a state with Ising topological order,
which is expected for a Kitaev spin liquid in an applied magnetic field.
Topological defects, which are singular points in a director field, play a
major role in shaping active systems. Here, we experimentally study topological
defects and the flow patterns around them, that are formed during the highly
rapid dynamics of swarming bacteria. The results are compared to the
predictions of two-dimensional active nematics. We show that, even though some
of the assumptions underlying the theory do not hold, the swarm dynamics is in
agreement with two-dimensional nematic theory. In particular, we look into the
multi-layered structure of the swarm, which is an important feature of real,
natural colonies, and find a strong coupling between layers. Our results
suggest that the defect-charge density is hyperuniform, i.e., that long range
density-fluctuations are suppressed.
Networks of interconnected materials permeate throughout nature, biology, and
technology due to exceptional mechanical performance. Despite the importance of
failure resistance in network design and utility, no existing physical model
effectively links strand mechanics and connectivity to predict bulk fracture.
Here, we reveal a universal scaling law that bridges these levels to predict
the intrinsic fracture energy of diverse networks. Simulations and experiments
demonstrate its remarkable applicability to a breadth of strand constitutive
behaviors, topologies, dimensionalities, and length scales. We show that local
strand rupture and nonlocal energy release contribute synergistically to the
measured intrinsic fracture energy in networks. These effects coordinate such
that the intrinsic fracture energy scales independent of the energy to rupture
a strand; it instead depends on the strand rupture force, breaking length, and
connectivity. Our scaling law establishes a physical basis for understanding
network fracture and a framework for fabricating tough materials from networks
across multiple length scales.
We report on a lattice fermion formulation with a curved domain-wall mass
term to nonperturbatively describe fermions in a gravitational background. In
our previous work in 2022, we showed under the time-reversal symmetry that the
edge-localized massless Dirac fermion appears on one and two-dimensional
spherical domain-walls and the spin connection is induced on the lattice in a
consistent way with continuum theory. In this work, we extend our study to the
Shamir type curved domain-wall fermions without the time-reversal symmetry. We
find in the free fermion case that a single Weyl fermion appears on the edge,
and feels gravity through the induced spin connection. With a topologically
nontrivial $U(1)$ gauge potential, however, we find an oppositely chiral zero
mode at the center where the gauge field is singular.
We study the effect of a Rashba spin-orbit coupling on the nodal
superconducting phase of an Ising superconductor. Such nodal phase was
predicted to occur when applying an in-plane field beyond the Pauli limit to a
superconducting monolayer transition metal dichalcogenides (TMD). Generically,
Rashba spin-orbit is known to lift the chiral symmetry that protects the nodal
points, resulting in a fully gapped phase. However, when the magnetic field is
applied along the $\Gamma -K $ line, a residual vertical mirror symmetry
protects a nodal crystalline phase. We study a single-band tight-binding model
that captures the low energy physics around the $\Gamma $ pocket of monolayer
TMD. We calculate the topological properties, the edge state structure, and the
current phase relation in a Josephson junction geometry of the nodal
crystalline phase. We show that while the nodal crystalline phase is
characterized by localized edge modes on non-self-reflecting boundaries, the
current phase relation exhibits a trivial $2\pi $ periodicity in the presence
of Rashba spin-orbit coupling.
The two-dimensional quantum anomalous Hall (QAH) effect is direct evidence of
non-trivial Berry curvature topology in condensed matter physics. Searching for
QAH in 2D materials, particularly with simplified fabrication methods, poses a
significant challenge in future applications. Despite numerous theoretical
works proposed for the QAH effect with $C=2$ in graphene, neglecting magnetism
sources such as proper substrate effects remain experimental evidence absent.
In this work, we propose the QAH effect in graphene/$\rm MnBi_{2}Te_{4}$ (MBT)
heterostructure based on density-functional theory (DFT). The monolayer MBT
introduces spin-orbital coupling, Zeeman exchange field, and Kekul$\rm
\acute{e}$ distortion as a substrate effect into graphene, resulting in QAH
with $C=1$ in the heterostructure. Our effective Hamiltonian further presents a
rich phase diagram that has not been studied previously. Our work provides a
new and practical way to explore the QAH effect in monolayer graphene and the
magnetic topological phases by the flexibility of MBT family materials.
In this work, we discuss properties with no static counterpart arising in
Floquet topological insulators with a dynamical chiral symmetry (DCS), i.e., a
chiral symmetry which is present while driving. We explore the topological
properties of Floquet insulators possessing a DCS which either does or does not
survive upon taking the static limit. We consider the case of harmonic drives
and employ a general framework using the quasi-energy operator in frequency
space. We find that for a DCS with no static analog, the presence of driving
has a negligible impact on the topological phases associated with zero
quasi-energy. In stark contrast, topological gaps can open at $\pi$
quasi-energy and mainly occur at momenta where the driving perturbation
vanishes. We confirm the above general predictions for an extended Kitaev chain
model in the BDI symmetry class. Another possibility that opens up when adding
the drive, while preserving chiral symmetry, is symmetry-class conversion. We
demonstrate such an effect for a static CI class Hamiltonian which is
topologically trivial in 1D. By considering a suitable driving, we obtain a
CI$\rightarrow$AIII transition, which now enables the system to harbor
topological $\pi$-modes. Notably, the arising topological phases strongly
depend on whether the DCS has a static analog or not. Our results bring Floquet
insulators with nonstandard DCS forward as ideal candidate platforms for
engineering and manipulating topological $\pi$-modes.
With the rapidly expanded field of two-dimensional(2D) magnetic materials,
the frustrated magnetic skyrmions are attracting growing interest recently.
Here, based on hexagonal close-packed (HCP) lattice of $J_1$-$J_2$ Heisenberg
spins model, we systematically investigate the frustrated skyrmions and phase
transition by micromagnetic simulations and first-principles calculations. The
results show that four spin phases of antiferromagnetic, labyrinth domain,
skyrmion and ferromagnetic textures are determined by the identified ranges of
$J_1$-$J_2$. Importantly, skyrmion phase with an increasing topological number
($Q$) covers a wider $J_1$-$J_2$ area. Then, the diameter of skyrmions can be
tuned by the frustration strength ($|J_2/J_1|$) or external magnetic field.
Besides, a phase transition from N$\acute{e}$el to Bloch type skyrmion is
observed due to the change of the helicity with the variation of $|J_2/J_1|$.
Furthermore, as increasing magnetic field, the skyrmions with high $Q$ ($\ge
3$) tend to split into the ones with $Q=1$, thereby achieving a lower
systematic energy. Additionally, we find that the CoCl$_2$ monolayer satisfies
the requirement of the frustrated $J_1$-$J_2$ magnet, and the related magnetic
behaviors agree with the above conclusions. The frustration-induced skyrmions
are stable without the manipulation of temperature and magnetic field. Our
results may open a possible way toward spintronic applications based on
High-topological-number and nanoscale topological spin textures of skyrmions.
We solve the Landau-Lifshitz-Gilbert equation in the finite-temperature
regime, where thermal fluctuations are modeled by a random magnetic field whose
variance is proportional to the temperature. By rescaling the temperature
proportionally to the computational cell size $\Delta x$ ($T \to T\,\Delta
x/a_{\text{eff}}$, where $a_{\text{eff}}$ is the lattice constant) [M. B. Hahn,
J. Phys. Comm., 3:075009, 2019], we obtain Curie temperatures $T_{\text{C}}$
that are in line with the experimental values for cobalt, iron and nickel. For
finite-sized objects such as nanowires (1D) and nanolayers (2D), the Curie
temperature varies with the smallest size $d$ of the system. We show that the
difference between the computed finite-size $T_{\text{C}}$ and the bulk
$T_{\text{C}}$ follows a power-law of the type: $(\xi_0/d)^\lambda$, where
$\xi_0$ is the correlation length at zero temperature, and $\lambda$ is a
critical exponent. We obtain values of $\xi_0$ in the nanometer range, also in
accordance with other simulations and experiments. The computed critical
exponent is close to $\lambda=2$ for all considered materials and geometries.
This is the expected result for a mean-field approach, but slightly larger than
the values observed experimentally.
Freestanding ferroelectric oxide membranes emerge as a promising platform for
exploring the interplay between topological polar ordering and dipolar
interactions that are continuously tunable by strain. Our investigations
combining density functional theory (DFT) and deep-learning-assisted molecular
dynamics simulations demonstrate that DFT-predicted strain-driven morphotropic
phase boundary involving monoclinic phases manifest as diverse domain
structures at room temperatures, featuring continuous distributions of dipole
orientations and mobile domain walls. Detailed analysis of dynamic structures
reveals that the enhanced piezoelectric response observed in stretched
PbTiO$_3$ membranes results from small-angle rotations of dipoles at domain
walls, distinct from conventional polarization rotation mechanism and adaptive
phase theory inferred from static structures. We identify a ferroelectric
topological structure, termed "dipole spiral," which exhibits a giant intrinsic
piezoelectric response ($>$320 pC/N). This helical structure, primarily
stabilized by entropy and possessing a rotational zero-energy mode, unlocks new
possibilities for exploring chiral phonon dynamics and dipolar
Dzyaloshinskii-Moriya-like interactions.
In this article, we analyze a magnetic monopole in topological insulators.
The monopole obtain a fractional electric charge because of the Witten effect.
We consider this system with a microscopic view by adding the Wilson term to
the ordinary Dirac Hamiltonian. The Wilson term yields the positive mass shift
to the effective mass of the electrons, then the curved domain-wall is
dynamically generated around the monopole. The zero-modes of the electrons are
localized on the domain-wall, which can be identified as the source of the
electric charge.
We investigate electric-field effects in dilute electrolytes with nonlinear
polarization. As a first example of such systems, we add a dipolar component
with a relatively large dipole moment $\mu_0$ to an aqueous electrolyte. As a
second example, the solvent itself exhibits nonlinear polarization near charged
objects. For such systems, we present a Ginzburg-Landau free energy and
introduce field-dependent chemical potentials, entropy density, and stress
tensor, which satisfy general thermodynamic relations. In the first example,
the dipoles accumulate in high-field regions, as predicted by Abrashikin {\it
et al}.$[$Phys.Rev.Lett. {\bf 99}, 077801 (2007)$]$. Finally, we consider the
case, where Bjerrum ion pairs form a dipolar component with nonlinear
polarization. The Bjerrum dipoles accumulate in high-field regions, while
field-induced dissociation was predicted by Onsager $[$J. Chem. Phys.{\bf 2},
599 (1934)$]$. We present an expression for the field-dependent association
constant $K(E)$, which depends on the field strength nonmonotonically.
Two-dimensional topological superconductor (TSC) represents an exotic quantum
material with quasiparticle excitation manifesting in dispersive Majorana mode
(DMM) at the boundaries. A domain-wall DMM can arise at the boundary between
two TSC domains with opposite Chern numbers or with a $\pi$-phase shift in
their pairing gap, which can only be tuned by magnetic field. Here we propose
the concept of ferroelectric (FE) TSC, which not only enriches the domain-wall
DMMs but also significantly makes them electrically tunable. The $\pi$-phase
shift of the pairing gap is shown to be attained between two TSC domains of
opposite FE polarization, and switchable by reversing FE polarizations. In
combination with ferromagnetic (FM) polarization, the domain wall can host
helical, doubled chiral, and fused DMMs, which can be transferred into each
other by changing the direction of electrical and/or magnetic field.
Furthermore, based on first-principles calculations, we demonstrate
$\alpha$-In$_2$Se$_3$ to be a promising FE TSC candidate in proximity with a FM
layer and a superconductor substrate. We envision that FE TSC will
significantly ease the manipulation of DMM by electrical field to realize
fault-tolerant quantum computation.
We use momentum-dependent electron energy-loss spectroscopy in transmission
to study collective charge excitations in the "strange" layer metal
Sr$_2$RuO$_4$. We cover a complete range between in-plane and out-of-plane
oscillations. Outside of the classical range of electron-hole excitations,
leading to a Landau damping, we observe well defined plasmons. The optical
(acoustic) plasmon due to an in-phase (out-of-phase) charge oscillation of
neighbouring layers exhibits a quadratic (linear) dispersion. Using a model for
the Coulomb interaction of the charges in a layered system, it is possible to
describe the complete range of plasmon excitations in a mean-field random phase
approximation without taking correlation effects into account. There are no
signs of over-damped plasmons predicted by holographic theories. This indicates
that long wavelength charge excitations are not influenced by local correlation
effects such as on-site Coulomb interaction and Hund's exchange interaction.
The magnetic sublayers introduced by intercalation into the host
transition-metal dichalcogenide (TMD) are known to produce various magnetic
states. The magnetic sublayers and their magnetic ordering strongly modify the
electronic coupling between layers of the host compound. Understanding the
roots of this variability is a significant challenge. Here we employ the
angle-resolved photoelectron spectroscopy at various photon energies, the {\it
ab initio} electronic structure calculations, and modeling to address the
particular case of Ni-intercalate, Ni$_{1/3}$NbS$_2$. We find that the bands
around the Fermi level bear the signature of a strong yet unusual hybridization
between NbS$_2$ conduction band states and the Ni 3$d$ orbitals. The
hybridization between metallic NbS$_2$ layers is almost entirely suppressed in
the central part of the Brillouin zone, including the part of the Fermi surface
around the $\mathrm{\Gamma}$ point. Simultaneously, it gets very pronounced
towards the zone edges. It is shown that this behavior is the consequence of
the rather exceptional, {\it symmetry imposed}, spatially strongly varying,
{\it zero total} hybridization between relevant Ni magnetic orbitals and the
neighboring Nb orbitals that constitute the metallic bands. We also report the
presence of the so-called $\beta$-feature, discovered only recently in two
other magnetic intercalates with very different magnetic orderings. In
Ni$_{1/3}$NbS$_2$, the feature shows only at particular photon energies,
indicating its bulk origin. Common to prior observations, it appears as a
series of very shallow electron pockets at the Fermi level, positioned along
the edge of the Brillouin zone. Unforeseen by {\it ab initio} electronic
calculations, and its origin still unresolved, the feature appears to be a
robust consequence of the intercalation of 2H-NbS$_2$ with magnetic ions.
Transition metal-based quaternary chalcogenides have gathered immense
attention for various renewable energy applications including thermoelectrics
(TE). While low-symmetry and complex structure help to achieve low thermal
conductivity, the TE power factor and hence the figure of merit (ZT) remains
low which hinders to promote these class of materials for future TE
applications. Here, we investigated the TE properties of a new system,
Cu$_2$ZnSiTe$_4$, with improved electronic transport using first-principles
calculation. The presence of heavy chalcogen like Te, helps to achieve a
relatively low bandgap (0.58 eV). This, together with unique electronic band
topology, leads to a promising value of power-factor of 3.95(n-type) and
3.06(p-type) mWm$^{-1}$K$^{-2}$ at 900 K. Te atoms also play a crucial role in
mixing the optical and acoustic phonon branches which, in turn, are responsible
for reduced lattice thermal conductivity ($\sim$0.7 Wm$^{-1}$K$^{-1}$ at high
temperature). Though the thermal conductivity is not appreciably low, the
electronic transport properties (power factor) are quite favorable to yield
promising TE figure of merit (ZT $\sim$2.67 (n-type) and $\sim$2.11 (p-type) at
900 K). We propose Cu$_2$ZnSiTe$_4$ to be a potential candidate for TE
applications, and believe to attract future experimental/theoretical studies.
The spatial Kibble-Zurek mechanism (KZM) is applied to the Kitaev chain with
inhomogeneous pairing interactions that vanish in half of the lattice and
result in a quantum critical point separating the superfluid and normal-gas
phases in real space. The weakly-interacting BCS theory predicts scaling
behavior of the penetration of the pair wavefunction into the normal-gas region
different from conventional power-law results due to the non-analytic
dependence of the BCS order parameter on the interaction. The Bogoliubov-de
Gennes (BdG) equation produces numerical results confirming the scaling
behavior and hints complications in the strong-interaction regime. The limiting
case of the step-function quench shows the dominance of the BCS coherence
length in absence of additional length scale. Furthermore, the energy spectrum
and wavefunctions from the BdG equation show abundant in-gap states from the
normal-gas region in addition to the topological edge states.
Although LiNiO$_2$ is chemically similar to LiCoO$_2$ and offers a nearly
identical theoretical capacity, LiNiO$_2$ and related Co-free Ni-rich cathode
materials suffer from degradation during electrochemical cycling that has
prevented practical use in Li-ion batteries. The observed capacity decay of
LiNiO$_2$ has been attributed to the formation of structural defects via Li/Ni
cation mixing that reduces cyclability and leads to poor capacity retention.
Herein, we investigate the kinetics and thermodynamics of Li/Ni mixing in ideal
LiNiO$_2$ and off-stoichiometric Li$_{1-z}$Ni$_{1+z}$O$_2$. We find that ideal
LiNiO$_2$ is stable against cation mixing with similar characteristics as
LiCoO$_2$. Li/Ni mixing is promoted by extra Ni in the Li layers that cannot be
avoided in synthesis. Our study elucidates the crucial role of extra Ni atoms
on Li sites in the cation mixing mechanism, an insight that can inform the
development of Co-free cathode materials.
Recent experiments discovered fractional Chern insulator states at zero
magnetic field in twisted bilayer MoTe$_2$ [C23,Z23] and WSe$_2$ [MD23]. In
this article, we study the MacDonald Hamiltonian for twisted transition metal
dichalcogenides (TMDs) and analyze the low-lying spectrum in TMDs in the limit
of small twisting angles. Unlike in twisted bilayer graphene Hamiltonians, we
show that TMDs do not exhibit flat bands. The flatness in TMDs for small
twisting angles is due to spatial confinement by a matrix-valued potential. We
show that by generalizing semiclassical techniques developed by Simon [Si83]
and Helffer-Sj\"ostrand [HS84] to matrix-valued potentials, there exists a wide
range of model parameters such that the low-lying bands are of exponentially
small width in the twisting angle, topologically trivial, and obey a harmonic
oscillator-type spacing with explicit parameters.
The chalcogenide perovskite BaZrS$_3$ has strong visible light absorption and
high chemical stability, is nontoxic, and is made from earth-abundant elements.
As such, it is a promising candidate material for application in optoelectronic
technologies. However the synthesis of BaZrS$_3$ thin-films for
characterisation and device integration remains a challenge. Here we use
density functional theory and lattice dynamics to calculate the vibrational
properties of elemental, binary and ternary materials in the Ba-Zr-S system.
This is used to build a thermodynamic model for the stability of BaZrS$_3$,
BaS$_x$, and ZrS$_x$ in equilibrium with sulfur gas, across a range of
temperatures and sulfur partial pressures. We highlight that reaction
thermodynamics are highly sensitive to sulfur allotrope and the extent of
allotrope mixing. We use our model to predict the synthesis conditions in which
BaZrS$_3$ and the intermediate compound BaS$_3$, which is associated with fast
reaction kinetics, can form. At a moderate temperature of 500C we find that
BaS$_3$ is stable at pressures above 3x10$^5$ Pa. We also find BaZrS$_3$ is
stable against decomposition into sulfur-rich binaries up to at least 1x10$^7$
Pa. Our work provides insights into the chemistry of this promising material
and suggests the experimental conditions required for the successful synthesis
of BaZrS$_3$.
Python and Jupyter are becoming increasingly popular tools for computational
physics and chemistry research and education. Interactive notebooks are a
precious tool for creating graphical user interfaces and teaching materials,
and Jupyter widgets constitute the core of their interactive functionality.
Packages and libraries which offer a broad range of widgets for general
purposes exist, but the lack of specialized widgets for computational physics,
chemistry and materials science implies significant time investments for the
development of effective Jupyter notebooks for research and education in these
domains. Here, we present custom Jupyter widgets that we have developed to
target the needs of these research and teaching communities. These widgets
constitute high quality interactive graphical components and can be employed,
for example, as tools to visualize and manipulate data, or to explore different
visual representations of concepts, illuminating the relationships existing
between them. In addition, we discuss the JupyterLab extensions that we
developed to modify the JupyterLab interface for an enhanced user experience
when working with various applications within the targeted scientific domains.
Colloidal probe Atomic Force Microscopy (AFM) allows to explore sliding
friction phenomena in graphite contacts of nominal lateral size up to hundreds
of nanometers. It is known that contact formation involves tribo-induced
material transfer of graphite flakes from the graphitic substrate to the
colloidal probe. In this context, sliding states with nearly-vanishing
friction, i.e. superlubricity, may set in. A comprehensive investigation of the
transfer layer properties is mandatory to ascertain the origin of
superlubricity. Here we explore the friction response of micrometric beads, of
different size and pristine surface roughness, sliding on graphite under
ambient conditions. We show that such tribosystems undergo a robust transition
towards a low-adhesion, low-friction state dominated by mechanical interactions
at one dominant tribo-induced nanocontact. Friction force spectroscopy reveals
that the nanocontact can be superlubric or dissipative, in fact undergoing a
load-driven transition from dissipative stick-slip to continuous superlubric
sliding. This behavior is excellently described by the thermally-activated,
single-asperity Prandtl-Tomlinson model. Our results indicate that upon
formation of the transfer layer, friction depends on the energy landscape
experienced by the topographically-highest tribo-induced nanoasperity.
Consistently we find larger dissipation when the tribo-induced nanoasperity is
sled against surfaces with higher atomic corrugation than graphite, like MoS2
and WS2, in prototypical Van der Waals layered hetero-junctions.
Landauer's principle makes a strong connection between information theory and
thermodynamics by stating that erasing a one-bit memory at temperature $T_0$
requires an average energy larger than $W_{LB}=k_BT_0 \ln2$, with $k_B$
Boltzmann's constant. This tiny limit has been saturated in model experiments
using quasi-static processes. For faster operations, an overhead proportional
to the processing speed and to the memory damping appears. In this article, we
show that underdamped systems are a winning strategy to reduce this extra
energetic cost. We prove both experimentally and theoretically that, in the
limit of vanishing dissipation mechanisms in the memory, the physical system is
thermally insulated from its environment during fast erasures, i.e. fast
protocols are adiabatic as no heat is exchanged with the bath. Using a fast
optimal erasure protocol we also show that these adiabatic processes produce a
maximum adiabatic temperature $T_a=2T_0$, and that Landauer's bound for fast
erasures in underdamped systems becomes the adiabatic bound: $W_a = k_B T_0$.
Energy dissipation is of fundamental interest and crucial importance in
quantum systems. However, whether energy dissipation can emerge inside
topological systems remains a question, especially when charge transport is
topologically protected and quantized. As a hallmark, we propose a microscopic
picture that illustrates energy dissipation in the quantum Hall (QH) plateau
regime of graphene. Despite the quantization of Hall, longitudinal, and
two-probe resistances (dubbed as the quantum limit), we find that the energy
dissipation emerges in the form of Joule heat. By analyzing the energy
distribution of electrons, it is found that electrons can evolve between
equilibrium and non-equilibrium without inducing extra two-probe resistance.
The relaxation of non-equilibrium electrons results in the dissipation of
energy along the QH edge states. Eventually, we suggest probing the phenomenon
by measuring local temperature increases in experiments and reconsidering the
dissipation typically ignored in realistic topological circuits.
The Planar Hall effect (PHE) in topological materials has been a subject of
great interest in recent years. Generally, it is understood to originate from
the chiral-anomaly (CA) induced charge pumping between doubly degenerate Weyl
nodes. However, the occurrence of PHE in the materials with positive and
anisotropic orbital magnetoresistance has raised questions about CA being the
sole origin of this effect. Here, we report the PHE, magnetoresistance, and
thermal transport properties (Seebeck and Nernst coefficients) on the Ag
intercalated PdTe$_2$. We observe positive longitudinal magnetoresistance, the
linear field dependence of the amplitude of PHE, and a prolate pattern in the
parametric plots. The planar Hall resistivity and anisotropic magnetoresitance
fits well with theoretical study of CA being the origin of PHE. So, our
observations are consistent with Weyl physics dominating the PHE in PdTe$_2$,
Cu$_{0.05}$PdTe$_2$, and Ag$_{0.05}$PdTe$_2$. We further support our data with
a theoretical model that reproduces the qualitative experimental features. In
addition, we have calculated the Seebeck ($\it{S}$) and Nernst ($\nu$)
coefficients for PdTe$_2$ and Cu and Ag intercalated compounds. The estimated
values of Fermi energy for the Cu and Ag intercalated compounds are
respectively two times and three times larger than that of PdTe$_2$.
We study the low-energy eigenstates of a topological superconductor wire
modeled by a Kitaev chain, which is connected at one of its ends to a quantum
dot through nearest-neighbor (NN) hopping and NN Coulomb repulsion. Using an
unrestricted Hartree-Fock approximation to decouple the Coulomb term, we obtain
that the quality of the Majorana end states is seriously affected by this term
only when the dependence of the low-lying energies with the energy of the
quantum dot shows a "diamond" shape, characteristic of short wires. We discuss
limitations of the simplest effective models to describe the physics. We expect
the same behavior in more realistic models for topological superconducting
wires.
Topological defects play a key role in the structures and dynamics of liquid
crystals (LCs) and other ordered systems. There is a recent interest in
studying defects in different biological systems with distinct textures.
However, a robust method to directly recognize defects and extract their
structural features from various traditional and nontraditional nematic systems
remains challenging to date. Here we present a machine learning solution,
termed Machine Eye for Defects (MED), for automated defect analysis in images
with diverse nematic textures. MED seamlessly integrates state-of-the-art
object detection networks, Segment Anything Model, and vision transformer
algorithms with tailored computer vision techniques. We show that MED can
accurately identify the positions, winding numbers, and orientations of $\pm
1/2$ defects across distinct cellular contours, sparse vector fields of nematic
directors, actin filaments, microtubules, and simulation images of Gay--Berne
particles. MED performs faster than conventional defect detection method and
can achieve over 90\% accuracy on recognizing $\pm1/2$ defects and their
orientations from vector fields and experimental tissue images. We further
demonstrate that MED can identify defect types that are not included in the
training data, such as giant-core defects and defects with higher winding
number. Remarkably, MED provides correct structural information about $\pm 1$
defects, i.e., the phase angle for $+1$ defects and the orientation angle for
$-1$ defects. As such, MED stands poised to transform studies of diverse
ordered systems by providing automated, rapid, accurate, and insightful defect
analysis.
We use the radial null energy condition to construct a monotonic $a$-function
for a certain type of non-relativistic holographic RG flows. We test our
$a$-function in three different geometries that feature a Boomerang RG flow,
characterized by a domain wall between two AdS spaces with the same AdS radius,
but with different (and sometimes directions dependent) speeds of light. We
find that the $a$-function monotonically decreases and goes to a constant in
the asymptotic regimes of the geometry. Using the holographic dictionary in
this asymptotic AdS spaces, we find that the $a$-function not only reads the
fixed point central charge but also the speed of light, suggesting what the
correct RG charge might be for non-relativistic RG flows.
We investigate the domain wall network in twisted bilayer graphene (TBG)
under the influence of interlayer bias and screening effect from the layered
structure. Starting from the continuum model, we analyze the low-energy domain
wall modes within the moir\'e bilayer structure and obtain an analytic form
representing charge density distributions of the two-dimensional structure. By
computing the screened electron-electron interaction strengths both within and
between the domain walls, we develop a bosonized model that describes the
correlated domain wall network. We demonstrate that these interaction strengths
can be modified through an applied interlayer bias, screening length and
dielectric materials, and show how the model can be employed to investigate
various properties of the domain wall network and its stability. We compute
correlation functions both without and with phonons. Including electron-phonon
coupling in the network, we establish phase diagrams from these correlation
functions. These diagrams illustrate electrical tunability of the network
between various phases, such as density wave states and superconductivity. Our
findings reveal the domain wall network as a promising platform for the
experimental manipulation of electron-electron interactions in low dimensions
and the study of strongly correlated matter. We point out that our
investigation not only enhances the understanding of domain wall modes in TBG
but also has broader implications for the development of moir\'e devices.
We show here that numerous examples abound where changing topology does not
necessarily close the bulk insulating charge gap as demanded in the standard
non-interacting picture. From extensive determinantal and dynamical cluster
quantum Monte Carlo simulations of the half-filled and quarter-filled
Kane-Mele-Hubbard model, we show that for sufficiently strong interactions at
either half- or quarter-filling, a transition between topological and trivial
insulators occurs without the closing of a charge gap. To shed light on this
behavior, we illustrate that an exactly solvable model reveals that while the
single-particle gap remains, the many-body gap does in fact close. These two
gaps are the same in the non-interacting system but depart from each other as
the interaction turns on. We purport that for interacting systems, the proper
probe of topological phase transitions is the closing of the many-body rather
than the single-particle gap.

Date of feed: Fri, 12 Jan 2024 01:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **First-principles calculations of the electronic and optical properties of penta-graphene monolayer: study of many-body effects. (arXiv:2401.05429v1 [physics.comp-ph])**

Babak Minaie, Seyed A. Ketabi, José M. De Sousa

**On the zero-field quantization of the anomalous quantum Hall effect in moir\'e 2D layers. (arXiv:2401.05485v1 [cond-mat.mes-hall])**

Sankar Das Sarma, Ming Xie

**Topological superconductivity induced by a Kitaev spin liquid. (arXiv:2401.05488v1 [cond-mat.supr-con])**

Sondre Duna Lundemo, Asle Sudbø

**A Cold-Atom Particle Collider. (arXiv:2401.05489v1 [cond-mat.quant-gas])**

Guo-Xian Su, Jesse Osborne, Jad C. Halimeh

**Non-Gaussian diffusive fluctuations in Dirac fluids. (arXiv:2401.05494v1 [cond-mat.stat-mech])**

Sarang Gopalakrishnan, Ewan McCulloch, Romain Vasseur

**Static and fluctuating zigzag order, and possible signatures of Kitaev physics, in torque measurements of ${\alpha}$-RuCl${_3}$. (arXiv:2401.05546v1 [cond-mat.str-el])**

Shaun Froude-Powers, Subin Kim, Jacob Gordon, Hae-Young Kee, Young-June Kim, Stephen R. Julian

**Topological defects in multi-layered swarming bacteria. (arXiv:2401.05560v1 [cond-mat.soft])**

Victor Yashunsky, Daniel J.G. Pearce, Gil Ariel, Avraham Be'er

**A Universal Scaling Law for Intrinsic Fracture Energy of Networks. (arXiv:2401.05564v1 [cond-mat.mtrl-sci])**

Chase Hartquist, Shu Wang, Qiaodong Cui, Wojciech Matusik, Bolei Deng, Xuanhe Zhao

**A lattice regularization of Weyl fermions in a gravitational background. (arXiv:2401.05636v1 [hep-lat])**

Shoto Aoki, Hidenori Fukaya, Naoto Kan

**Josephson Junction of Nodal Superconductors with Rashba and Ising Spin-Orbit coupling. (arXiv:2401.05685v1 [cond-mat.mes-hall])**

Gal Cohen, Ranjani Seshadri, Maxim Khodas, Dganit Meidan

**Atomic Scale Quantum Anomalous Hall Effect in Monolayer Graphene/$\rm MnBi_{2}Te_{4}$ Heterostructure. (arXiv:2401.05691v1 [cond-mat.mes-hall])**

Yueh-Ting Yao, Suyang Xu, Tay-Rong Chang

**Dynamical Chiral Symmetry and Symmetry-Class Conversion in Floquet Topological Insulators. (arXiv:2401.05697v1 [cond-mat.mes-hall])**

Mohamed Assili, Panagiotis Kotetes

**Skyrmions with a high topological number and phase transition in two-dimensional frustrated J1-J2 magnets. (arXiv:2401.05719v1 [physics.comp-ph])**

Hongliang Hu, Zhong Shen, Zheng Chen, Xiaoping Wu, Tingting Zhong, Changsheng Song

**Micromagnetic simulations of the size dependence of the Curie temperature in ferromagnetic nanowires and nanolayers. (arXiv:2401.05722v1 [cond-mat.mes-hall])**

Clémentine Courtès, Matthieu Boileau, Raphaël Côte, Paul-Antoine Hervieux, Giovanni Manfredi

**Giant piezoelectric effects of topological structures in stretched ferroelectric membranes. (arXiv:2401.05789v1 [cond-mat.mtrl-sci])**

Yihao Hu, Jiyuan Yang, Shi Liu

**A Microscopic study of Magnetic monopoles in Topological Insulators. (arXiv:2401.05804v1 [hep-lat])**

Shoto Aoki, Hidenori Fukaya, Naoto Kan, Mikito Koshino, Yoshiyuki Matsuki

**Ions and dipoles in electric field: Nonlinear polarization and field-dependent chemical reaction. (arXiv:2401.05825v1 [cond-mat.soft])**

Akira Onuki

**Ferroelectric topological superconductor. (arXiv:2401.05847v1 [cond-mat.supr-con])**

Xiaoming Zhang, Pei Zhao, Feng Liu

**Optical and acoustic plasmons in the layered material Sr$_2$RuO$_4$. (arXiv:2401.05880v1 [cond-mat.str-el])**

J. Schultz, A. Lubk, F. Jerzembeck, N. Kikugawa, M. Knupfer, D. Wolf, B. Büchner, J. Fink

**Intercalation-induced states at the Fermi level and the coupling of intercalated magnetic ions to conducting layers in Ni$_{1/3}$NbS$_2$. (arXiv:2401.05884v1 [cond-mat.mtrl-sci])**

Yuki Utsumi Boucher, Izabela Biało, Mateusz A. Gala, Wojciech Tabiś, Marcin Rosmus, Natalia Olszowska, Jacek J. Kolodziej, Bruno Gudac, Mario Novak, Naveen Kumar Chogondahalli Muniraju, Ivo Batistić, Neven Barišić, Petar Popčević, Eduard Tutiš

**Cu$_2$ZnSiTe$_4$: A potential thermoelectric material with promising electronic transport. (arXiv:2401.05903v1 [cond-mat.mtrl-sci])**

Himanshu Sharma, Bhawna Sahni, Tanusri Saha-Dasgupta, Aftab Alam

**Structure and scaling of Kitaev chain across a quantum critical point in real space. (arXiv:2401.05954v1 [cond-mat.supr-con])**

Yan He, Chih-Chun Chien

**Understanding how off-stoichiometry promotes cation mixing in LiNiO$_2$. (arXiv:2401.05983v1 [cond-mat.mtrl-sci])**

Cem Komurcuoglu, Yunhao Xiao, Xinhao Li, Joaquin Rodriguez-Lopez, Zheng Li, Alan C. West, Alexander Urban

**Twisted TMDs in the small-angle limit: exponentially flat and trivial bands. (arXiv:2401.06078v1 [math-ph])**

Simon Becker, Mengxuan Yang

**A first-principles thermodynamic model for the Ba$\unicode{x2013}$Zr$\unicode{x2013}$S system in equilibrium with sulfur vapour. (arXiv:2401.06092v1 [cond-mat.mtrl-sci])**

Prakriti Kayastha, Giulia Longo, Lucy D. Whalley

**Jupyter widgets and extensions for education and research in computational physics and chemistry. (arXiv:2401.06113v1 [physics.ed-ph])**

Dou Du, Taylor J. Baird, Sara Bonella, Giovanni Pizzi

**Sliding friction and superlubricity of colloidal AFM probes coated by tribo-induced graphitic transfer layers. (arXiv:2210.01211v2 [cond-mat.mes-hall] UPDATED)**

Renato Buzio, Andrea Gerbi, Cristina Bernini, Luca Repetto, Andrea Vanossi

**Adiabatic computing for optimal thermodynamic efficiency of information processing. (arXiv:2302.09957v2 [cond-mat.stat-mech] UPDATED)**

Salambô Dago, Sergio Ciliberto, Ludovic Bellon

**Emergent Energy Dissipation in Quantum Limit. (arXiv:2303.07692v2 [cond-mat.mes-hall] UPDATED)**

Hailong Li, Hua Jiang, Qing-Feng Sun, X. C. Xie

**Chiral anomaly and positive longitudinal magnetoresistance in the type-II Dirac semimetals $\it{A}_x$PdTe$_2$ (\textit{A} = Cu, Ag). (arXiv:2303.18075v2 [cond-mat.str-el] UPDATED)**

Sonika, Sunil Gagwar, Nikhlesh Singh Mehta, G. Sharma, C.S.Yadav

**Effect of interatomic repulsion on Majorana zero modes in a coupled quantum-dot-superconducting-nanowire hybrid system. (arXiv:2309.10888v3 [cond-mat.mes-hall] UPDATED)**

R. Kenyi Takagui Perez, A. A. Aligia

**Machine Eye for Defects: Machine Learning-Based Solution to Identify and Characterize Topological Defects in Textured Images of Nematic Materials. (arXiv:2310.06406v2 [cond-mat.soft] UPDATED)**

Haijie Ren, Weiqiang Wang, Wentao Tang, Rui Zhang

**Holographic $a$-functions and Boomerang RG Flows. (arXiv:2310.15983v2 [hep-th] UPDATED)**

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

**Electrically tunable correlated domain wall network in twisted bilayer graphene. (arXiv:2311.14384v2 [cond-mat.mes-hall] UPDATED)**

Hao-Chien Wang, Chen-Hsuan Hsu

**Topological Phase Transition without Single-Particle-Gap Closing in Strongly Correlated Systems. (arXiv:2401.01402v2 [cond-mat.str-el] UPDATED)**

Peizhi Mai, Jinchao Zhao, Thomas A. Maier, Barry Bradlyn, Philip W. Phillips

Found 10 papers in prb Topological invariants are global properties of the ground-state wave function, typically defined as winding numbers in reciprocal space. Over the years, a number of topological markers in real space have been introduced, allowing to map topological order in heterogeneous crystalline and disordered … We show that slow time-periodic variation of the external magnetic field applied to a polariton topological insulator based on a honeycomb array of microcavity pillars with pronounced TE-TM splitting results in oscillations of the edge states along the boundary of the insulator accompanied by slow t… We report the topological electronic structure and magnetic and magnetotransport properties of a noncentrosymmetric compound GdAlSi. Magnetic susceptibility shows an antiferromagnetic transition at ${T}_{\mathrm{N}}=32$ K. In-plane isothermal magnetization exhibits an unusual hysteresis behavior at … Topological materials with unconventional electronic properties have been investigated intensively for both fundamental and practical interests. Thousands of topological materials have been identified by symmetry-based analysis and The excitonic dynamics in ${\mathrm{MoS}}_{2}$ monolayer, bilayer, and bulk flakes with different stacking orders, namely $3R$ and $2H$, are investigated through transient absorption spectroscopy at room temperature. Samples are obtained by the mechanical exfoliation of bulk ${\mathrm{MoS}}_{2}$ cry… Van der Waals magnetic materials are currently of great interest as materials for applications in future ultrathin nanoelectronics and nanospintronics. Due to weak coupling between individual monolayers, these materials can be easily obtained in the monolayer and bilayer forms. The latter are of spe… A Fermi gas of noninteracting electrons, or ultracold fermionic atoms, has a quantum ground state defined by a region of occupancy in momentum space known as the Fermi sea. The Euler characteristic ${χ}_{F}$ of the Fermi sea serves to topologically classify these gapless fermionic states. The topolo… We investigate the twisted topology of the complex eigenspectrum of a one-dimensional non-Hermitian system under the influence of long-range unidirectional coupling. Unlike the complex energy spectrum of the conventional Hatano-Nelson chain, which takes the form of a single loop with a topological w… We explore a solid-state qubit defined on valley isospin of an electron confined in a gate-defined quantum dot created in an area of monolayer ${\mathrm{MoS}}_{2}/{\mathrm{WS}}_{2}$ lateral junction where a steep dipolar potential emerges. We show that the junction oriented along an armchair directi… We theoretically show how structural modifications and controlling quantum coherency can enhance linear and nonlinear thermoelectric performance in graphene nanostructure heat engines. Although graphene has emerged as a promising material for a nanoscale heat engine due to its high coherency and tun…

Date of feed: Fri, 12 Jan 2024 04:17:04 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) **Local Chern marker for periodic systems**

Nicolas Baù and Antimo Marrazzo

Author(s): Nicolas Baù and Antimo Marrazzo

[Phys. Rev. B 109, 014206] Published Thu Jan 11, 2024

**Oscillating edge states in polariton topological insulators**

Chunyan Li and Yaroslav V. Kartashov

Author(s): Chunyan Li and Yaroslav V. Kartashov

[Phys. Rev. B 109, 014307] Published Thu Jan 11, 2024

**Electronic structure and magnetic and transport properties of antiferromagnetic Weyl semimetal GdAlSi**

Antu Laha, Asish K. Kundu, Niraj Aryal, Emil S. Bozin, Juntao Yao, Sarah Paone, Anil Rajapitamahuni, Elio Vescovo, Tonica Valla, Milinda Abeykoon, Ran Jing, Weiguo Yin, Abhay N. Pasupathy, Mengkun Liu, and Qiang Li

Author(s): Antu Laha, Asish K. Kundu, Niraj Aryal, Emil S. Bozin, Juntao Yao, Sarah Paone, Anil Rajapitamahuni, Elio Vescovo, Tonica Valla, Milinda Abeykoon, Ran Jing, Weiguo Yin, Abhay N. Pasupathy, Mengkun Liu, and Qiang Li

[Phys. Rev. B 109, 035120] Published Thu Jan 11, 2024

**Discovering two-dimensional magnetic topological insulators by machine learning**

Haosheng Xu, Yadong Jiang, Huan Wang, and Jing Wang

Author(s): Haosheng Xu, Yadong Jiang, Huan Wang, and Jing Wang*ab initio* calculations. However, the predicted magnetic topological …

[Phys. Rev. B 109, 035122] Published Thu Jan 11, 2024

**Transient absorption measurements of excitonic dynamics in $3R\text{−}{\mathrm{MoS}}_{2}$**

Gbenga Agunbiade, Neema Rafizadeh, Ryan J. Scott, and Hui Zhao

Author(s): Gbenga Agunbiade, Neema Rafizadeh, Ryan J. Scott, and Hui Zhao

[Phys. Rev. B 109, 035410] Published Thu Jan 11, 2024

**Spin waves in bilayers of transition metal dichalcogenides**

Wojciech Rudziński, Józef Barnaś, and Anna Dyrdał

Author(s): Wojciech Rudziński, Józef Barnaś, and Anna Dyrdał

[Phys. Rev. B 109, 035412] Published Thu Jan 11, 2024

**Topological density correlations in a Fermi gas**

Pok Man Tam and Charles L. Kane

Author(s): Pok Man Tam and Charles L. Kane

[Phys. Rev. B 109, 035413] Published Thu Jan 11, 2024

**Twisted topology of non-Hermitian systems induced by long-range coupling**

S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Haydar Sahin, Md. Saddam Hossain Razo, and Mansoor B. A. Jalil

Author(s): S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Haydar Sahin, Md. Saddam Hossain Razo, and Mansoor B. A. Jalil

[Phys. Rev. B 109, 045410] Published Thu Jan 11, 2024

**Electrical manipulation of valley qubit and valley geometric phase in lateral monolayer heterostructures**

Jarosław Pawłowski, John Eric Tiessen, Rockwell Dax, and Junxia Shi

Author(s): Jarosław Pawłowski, John Eric Tiessen, Rockwell Dax, and Junxia Shi

[Phys. Rev. B 109, 045411] Published Thu Jan 11, 2024

**Quantum coherent control of linear and nonlinear thermoelectricity in graphene nanostructure heat engines**

Yuga Kodama and Nobuhiko Taniguchi

Author(s): Yuga Kodama and Nobuhiko Taniguchi

[Phys. Rev. B 109, 045412] Published Thu Jan 11, 2024

Found 3 papers in prl An application of Ginzburg-Landau theory to superconducting twisted bilayer graphene determines the coherence length and the upper critical field, which are in agreement with recent experiments. The hexatic phase is an intermediate stage in the melting process of a 2D crystal due to topological defects. Recently, this exotic phase was experimentally identified in the vortex lattice of 2D weakly disordered superconducting MoGe by scanning tunneling microscopic measurements. Here, we study th… Twisted light carries a nonzero orbital angular momentum, that can be transferred from light to electrons and particles ranging from nanometers to micrometers. Up to now, the interplay between twisted light with dipolar systems has scarcely been explored, though the latter bear abundant forms of top…

Date of feed: Fri, 12 Jan 2024 04:17:02 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) **Ginzburg-Landau Theory of Flat-Band Superconductors with Quantum Metric**

Shuai A. Chen and K. T. Law

Author(s): Shuai A. Chen and K. T. Law

[Phys. Rev. Lett. 132, 026002] Published Thu Jan 11, 2024

**Nernst Sign Reversal in the Hexatic Vortex Phase of Weakly Disordered $a\text{−}\mathrm{MoGe}$ Thin Films**

Y. Wu, A. Roy, S. Dutta, J. Jesudasan, P. Raychaudhuri, and A. Frydman

Author(s): Y. Wu, A. Roy, S. Dutta, J. Jesudasan, P. Raychaudhuri, and A. Frydman

[Phys. Rev. Lett. 132, 026003] Published Thu Jan 11, 2024

**Dynamical Control of Topology in Polar Skyrmions via Twisted Light**

Lingyuan Gao, Sergei Prokhorenko, Yousra Nahas, and Laurent Bellaiche

Author(s): Lingyuan Gao, Sergei Prokhorenko, Yousra Nahas, and Laurent Bellaiche

[Phys. Rev. Lett. 132, 026902] Published Thu Jan 11, 2024

Found 4 papers in pr_res It is a basic principle that an effect cannot come before the cause. Dispersive relations that follow from this fundamental fact have proven to be an indispensable tool in physics and engineering. They are most powerful in the domain of linear response where they are known as Kramers-Kronig relation… Quantum spin liquids are highly entangled ground states of insulating spin systems, in which magnetic ordering is prevented down to the lowest temperatures due to quantum fluctuations. One of the most extraordinary characteristics of quantum spin liquid phases is their ability to support fractionali… The localized hinge state of the second-order topological insulator can have a non-Abelian Berry curvature component, which can be detected by a circular photogalvanic effect, with light illuminating a specific hinge. The optical sum rule can further reflect the interstate Berry curvature between the hinge state and the ground state. In bilayer graphene, a comprehensive catalog of double quantum dot Pauli blockade for up to four carriers per dot is established, revealing a more complex transition structure than in conventional systems due to the involvement of both spin and valley pseudospin degrees of freedom. This result provides new possibilities for spin and valley qubit manipulation and control in bilayer graphene.

Date of feed: Fri, 12 Jan 2024 04:17:02 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) **Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect**

Dusan Lorenc and Zhanybek Alpichshev

Author(s): Dusan Lorenc and Zhanybek Alpichshev

[Phys. Rev. Research 6, 013042] Published Thu Jan 11, 2024

**Detecting fractionalization in critical spin liquids using color centers**

So Takei and Yaroslav Tserkovnyak

Author(s): So Takei and Yaroslav Tserkovnyak

[Phys. Rev. Research 6, 013043] Published Thu Jan 11, 2024

**Interstate Berry curvature of hinge state and its detection**

Zheng Liu, Zhenhua Qiao, Yang Gao, and Qian Niu

Author(s): Zheng Liu, Zhenhua Qiao, Yang Gao, and Qian Niu

[Phys. Rev. Research 6, L012005] Published Thu Jan 11, 2024

**Pauli blockade catalogue and three- and four-particle Kondo effect in bilayer graphene quantum dots**

Chuyao Tong, Annika Kurzmann, Rebekka Garreis, Kenji Watanabe, Takashi Taniguchi, Thomas Ihn, and Klaus Ensslin

Author(s): Chuyao Tong, Annika Kurzmann, Rebekka Garreis, Kenji Watanabe, Takashi Taniguchi, Thomas Ihn, and Klaus Ensslin

[Phys. Rev. Research 6, L012006] Published Thu Jan 11, 2024

Found 1 papers in nano-lett

Date of feed: Thu, 11 Jan 2024 14:07:21 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] Exploiting Topological Darkness in Photonic Crystal Slabs for Spatiotemporal Vortex Generation**

Wenzhe Liu, Jiajun Wang, Yang Tang, Xinhao Wang, Xingqi Zhao, Lei Shi, Jian Zi, and C. T. ChanNano LettersDOI: 10.1021/acs.nanolett.3c04348

Found 3 papers in comm-phys Communications Physics, Published online: 09 January 2024; doi:10.1038/s42005-023-01516-2 Communications Physics, Published online: 09 January 2024; doi:10.1038/s42005-024-01519-7 Communications Physics, Published online: 09 January 2024; doi:10.1038/s42005-023-01517-1**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Automatically discovering ordinary differential equations from data with sparse regression**

Rui Carvalho

**Topological phase transitions of generalized Brillouin zone**

Moon Jip Park

**Generating fine-grained surrogate temporal networks**

B. Lepri

Found 1 papers in scipost **Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Hidden symmetry of Bogoliubov de Gennes quasi-particle eigenstates and universal relations in flat band superconducting bipartite lattices, by G. Bouzerar, M. Thumin**

< author missing >

Submitted on 2024-01-11, refereeing deadline 2024-02-16.