Found 48 papers in cond-mat Symmetries associated with the Hamiltonian describing bilayer graphene
subjected to a constant magnetic field perpendicular to the plane of the
bilayer are calculated using polar coordinates. These symmetries are then
applied to explain some fundamental properties, such as the spectrum and the
integer pseudo-spin character of the eigenfunctions. The probability and
current densities of the bilayer Hamiltonian have also been calculated in polar
coordinates and shown to be gauge invariant and scalar under generalized
rotations. We also define appropriate coherent states of this system as
eigenfunctions, with complex eigenvalues, of a suitable chose annihilation
operator. In this framework, symmetries are also useful to show the meaning of
the complex eigenvalue in terms of expected values. The local current density
of these coherent states is shown to exhibit a kind of radial component
interference effect, something that has gone unnoticed until now. Some of these
results that have just been exposed are graphically illustrated throughout the
manuscript.
With their non-Abelian topological charges, real multi-bandgap systems
challenge the conventional topological phase classifications. As the minimal
sector of multi-bandgap systems, real triple degeneracies (RTPs), which serves
as real "Weyl points", lay the foundation for the research on real topological
phases. However, experimental observation of RTP and physical systems with
global band configuration consisting of multiple RTPs in crystals has not been
reported. In this study, we employ Euler number to characterize RTPs, establish
their connection with both Abelian and non-Abelian charges, and provide
experimental evidence for the existence of RTPs in photonic meta-crystals. By
considering RTPs as the basic elements, we further propose the concept of a
topological compound, akin to a chemical compound, where we find that certain
phases are not topologically allowed. The topological classification of RTPs in
crystals demonstrated in our work plays a similar role as the "no-go" theorem
in the Weyl system.
Recent experiments have confirmed the presence of interlayer excitons in the
ground state of transition metal dichalcogenide (TMD) bilayers. The interlayer
excitons are expected to show remarkable transport properties when they undergo
Bose condensation. In this work, we demonstrate that quantum geometry of Bloch
wavefunctions plays an important role in the phase stiffness of the Interlayer
Exciton Condensate (IEC). Notably, we identify a geometric contribution that
amplifies the stiffness, leading to the formation of a robust condensate with
an increased BKT temperature. Our results have direct implications for the
ongoing experimental efforts on interlayer excitons in materials that have
non-trivial geometry. We provide quantitative estimates for the geometric
contribution in TMD bilayers through a realistic continuum model with gated
Coulomb interaction, and find that the substantially increased stiffness allows
for an IEC to be realized at amenable experimental conditions.
Amid the growing interest in non-Hermitian quantum systems, non-interacting
models have received the most attention. Here, through the stochastic series
expansion quantum Monte Carlo method, we investigate non-Hermitian physics in
interacting quantum systems, e.g., various non-Hermitian quantum spin chains.
While calculations yield consistent numerical results under open boundary
conditions, non-Hermitian quantum systems under periodic boundary conditions
observe an unusual concentration of imaginary-time worldlines over nontrivial
winding and require enhanced ergodicity between winding-number sectors for
proper convergences. Such nontrivial worldline winding is an emergent physical
phenomenon that also exists in other non-Hermitian models and analytical
approaches. Alongside the non-Hermitian skin effect and the point-gap
spectroscopy, it largely extends the identification and analysis of
non-Hermitian topological phenomena to quantum systems with interactions,
finite temperatures, biorthogonal basis, and periodic boundary conditions in a
novel and controlled fashion. Finally, we study the direct physical
implications of such nontrivial worldline winding, which bring additional,
potentially quasi-long-range contributions to the entanglement entropy.
We investigate the gauging of higher-form finite Abelian symmetries and their
sub-groups in quantum spin models in spatial dimensions $d=2$ and 3. Doing so,
we naturally uncover gauged models with dual higher-group symmetries and
potential mixed 't Hooft anomalies. We demonstrate that the mixed anomalies
manifest as the symmetry fractionalization of higher-form symmetries
participating in the mixed anomaly. Gauging is realized as an isomorphism or
duality between the bond algebras that generate the space of quantum spin
models with the dual generalized symmetry structures. We explore the mapping of
gapped phases under such gauging related dualities for 0-form and 1-form
symmetries in spatial dimension $d=2$ and 3. In $d=2$, these include several
non-trivial dualities between short-range entangled gapped phases with 0-form
symmetries and 0-form symmetry enriched Higgs and (twisted) deconfined phases
of the gauged theory with possible symmetry fractionalizations. Such dualities
also imply strong constraints on several unconventional, i.e., deconfined or
topological transitions. In $d=3$, among others, we find, dualities between
topological orders via gauging of 1-form symmetries. Hamiltonians self-dual
under gauging of 1-form symmetries host emergent non-invertible symmetries,
realizing higher-categorical generalizations of the Tambara-Yamagami fusion
category.
Finite-depth quantum circuits preserve the long-range entanglement structure
in quantum states and map between states within a gapped phase. To map between
states of different gapped phases, we can use Sequential Quantum Circuits which
apply unitary transformations to local patches, strips, or other sub-regions of
a system in a sequential way. The sequential structure of the circuit on the
one hand preserves entanglement area law and hence the gapped-ness of the
quantum states. On the other hand, the circuit has generically a linear depth,
hence it is capable of changing the long-range correlation and entanglement of
quantum states and the phase they belong to. In this paper, we discuss
systematically the definition, basic properties, and prototypical examples of
sequential quantum circuits that map product states to GHZ states,
symmetry-protected topological states, intrinsic topological states, and
fracton states. We discuss the physical interpretation of the power of the
circuits through connection to condensation, Kramers-Wannier duality, and the
notion of foliation for fracton phases.
For decades, mechanical resonators with high sensitivity have been realized
using thin-film materials under high tensile loads. Although there have been
remarkable strides in achieving low-dissipation mechanical sensors by utilizing
high tensile stress, the performance of even the best strategy is limited by
the tensile fracture strength of the resonator materials. In this study, a
wafer-scale amorphous thin film is uncovered, which has the highest ultimate
tensile strength ever measured for a nanostructured amorphous material. This
silicon carbide (SiC) material exhibits an ultimate tensile strength of over 10
GPa, reaching the regime reserved for strong crystalline materials and
approaching levels experimentally shown in graphene nanoribbons. Amorphous SiC
strings with high aspect ratios are fabricated, with mechanical modes exceeding
quality factors 10^8 at room temperature, the highest value achieved among SiC
resonators. These performances are demonstrated faithfully after characterizing
the mechanical properties of the thin film using the resonance behaviors of
free-standing resonators. This robust thin-film material has significant
potential for applications in nanomechanical sensors, solar cells, biological
applications, space exploration and other areas requiring strength and
stability in dynamic environments. The findings of this study open up new
possibilities for the use of amorphous thin-film materials in high-performance
applications.
The ability to tailor with a high accuracy the inter-site connectivity in a
lattice is a crucial tool for realizing novel topological phases of matter.
Here, we report the experimental realization of photonic dimer chains with
long-range hopping terms of arbitrary strength and phase, providing a rich
generalization of the celebrated Su-Schrieffer-Heeger model. Our experiment is
based on a synthetic dimension scheme involving the frequency modes of an
optical fiber loop platform. This setup provides direct access to both the band
dispersion and the geometry of the Bloch wavefunctions throughout the entire
Brillouin zone allowing us to extract the winding number for any possible
configuration. Finally, we highlight a topological phase transition solely
driven by a time-reversal-breaking synthetic gauge field associated with the
phase of the long-range hopping, providing a route for engineering topological
bands in photonic lattices belonging to the AIII symmetry class.
To describe the charge-polarization coupling in the nanostructure formed by a
thin Hf$_x$Zr$_{1-x}$O$_2$ film with a single-layer graphene as a top
electrode, we develop the phenomenological effective Landau-Ginzburg-Devonshire
model. This approach is based on the parametrization of the Landau expansion
coefficients for the polar and antipolar orderings in thin
Hf$_x$Zr$_{1-x}$O$_2$ films from a limited number of polarization-field curves
and hysteresis loops. The Landau expansion coefficients are nonlinearly
dependent on the film thickness $h$ and Zr/[Hf+Zr] ratio $x$, in contrast to
h-independent and linearly $x$-dependent expansion coefficients of a classical
Landau energy. We explain the dependence of the Landau expansion coefficients
by the strong nonmonotonic dependence of the Hf$_x$Zr$_{1-x}$O$_2$ film polar
properties on the film thickness, grain size and surface energy. The proposed
Landau free energy with five "effective" expansion coefficients, which are
interpolation functions of $x$ and $h$, describes the continuous transformation
of polarization dependences on applied electric field and hysteresis loop
shapes induced by the changes of $x$ and $h$ in the range $0 < x < 1$ and 5 nm
< $h$ < 35 nm. Using this effective free energy, we demonstrated that the
polarization of Hf$_x$Zr$_{1-x}$O$_2$ film influences strongly on the graphene
conductivity, and the full correlation between the distribution of polarization
and charge carriers in graphene is revealed. In accordance with our modeling,
the polarization of the (5 - 25) nm thick Hf$_x$Zr$_{1-x}$O$_2$ films, which
are in the ferroelectric-like or antiferroelectric-like states for the chemical
compositions $0.35 < x < 0.95$, determine the concentration of carriers in
graphene and can control its field dependence. The result can be promising for
creation of next generation Si-compatible nonvolatile memories and
graphene-ferroelectric FETs.
Doped Iron Chalcogenide (FeCh) superconductors are extensively studied in the
context of topological superconductivity. However, the evidence of topological
surface states in electrical transport measurements of the doped FeCh system is
yet warranted. In the present letter, we performed angle-dependent magneto
transport measurements on a single crystal of a doped FeCh system, i.e.,
FeSe$_{0.5}$Te$_{0.5}$. A non-saturating linear magnetoresistance (MR) has been
observed under the magnetic field up to 14 T in the normal state of
FeSe$_{0.5}$Te$_{0.5}$. The MR is shown to possess anisotropy, which indicates
the presence of topological surface states in FeSe$_{0.5}$Te$_{0.5}$.
Angle-dependent Magneto-conductivity (MC) at low magnetic fields has been
modelled by Hikami Larkin Nagaoka (HLN) formalism, which shows the presence of
weak antilocalization (WAL) effect in FeSe$_{0.5}$Te$_{0.5}$. The observed WAL
effect is found to be 2D in nature through angle-dependent magneto transport
measurements. Theoretical calculations based on Density Functional Theory (DFT)
are also performed to get more confidence on the presence of topological
surface states in FeSe$_{0.5}$Te$_{0.5}$.
Crack-template-based transparent conductive films (TCFs) are promising kinds
of junction-free, metallic network electrodes that can be used, e.g., for
transparent electromagnetic interference (EMI) shielding. Using image
processing of published photos of TCFs, we have analyzed the topological and
geometrical properties of such crack templates. Additionally, we analyzed the
topological and geometrical properties of some computer-generated networks. We
computed the electrical conductance of such networks against the number density
of their cracks. Comparison of these computations with predictions of the two
analytical approaches revealed the proportionality of the electrical
conductance to the square root of the number density of the cracks was found,
this being consistent with the theoretical predictions.
Here we describe an efficient numerical implementation of the Bethe-Salpeter
equation to obtain the excitonic spectrum of semiconductors. This is done on
the electronic structure calculated either at the simplest tight-binding level
or through density funcional theory calculations based on local orbitals. We
use a simplified model for the electron-electron interactions which considers
atomic orbitals as point-like orbitals and a phenomenological screening. The
optical conductivity can then be optionally computed within the Kubo formalism.
Our results for paradigmatic two-dimensional materials such as hBN and MoS2,
when compared with those of more sophisticated first-principles methods, are
excellent and envision a practical use of our implementation beyond the
computational limitations of such methods.
We consider fermionic ground states of the Landau Hamiltonian, $H_B$, in a
constant magnetic field of strength $B>0$ in $\mathbb R^2$ at some fixed Fermi
energy $\mu>0$, described by the Fermi projection $P_B:= 1(H_B\le \mu)$. For
some fixed bounded domain $\Lambda\subset \mathbb{R}^2$ with boundary set
$\partial\Lambda$ and an $L>0$ we restrict these ground states spatially to the
scaled domain $L \Lambda$ and denote the corresponding localised Fermi
projection by $P_B(L\Lambda)$. Then we study the scaling of the Hilbert-space
trace, $\mathrm{tr} f(P_B(L\Lambda))$, for polynomials $f$ with $f(0)=f(1)=0$
of these localised ground states in the joint limit $L\to\infty$ and $B\to0$.
We obtain to leading order logarithmically enhanced area-laws depending on the
size of $LB$. Roughly speaking, if $1/B$ tends to infinity faster than $L$,
then we obtain the known enhanced area-law (by the Widom--Sobolev formula) of
the form $L \ln(L) a(f,\mu) |\partial\Lambda|$ as $L\to\infty$ for the
(two-dimensional) Laplacian with Fermi projection $1(H_0\le \mu)$. On the other
hand, if $L$ tends to infinity faster than $1/B$, then we get an area law with
an $L \ln(\mu/B) a(f,\mu) |\partial\Lambda|$ asymptotic expansion as $B\to0$.
The numerical coefficient $a(f,\mu)$ in both cases is the same and depends
solely on the function $f$ and on $\mu$. The asymptotic result in the latter
case is based upon the recent joint work of Leschke, Sobolev and the second
named author for fixed $B$, a proof of the sine-kernel asymptotics on a global
scale, and on the enhanced area-law in dimension one by Landau and Widom. In
the special but important case of a quadratic function $f$ we are able to cover
the full range of parameters $B$ and $L$. In general, we have a smaller region
of parameters $(B,L)$ where we can prove the two-scale asymptotic expansion
$\mathrm{tr} f(P_B(L\Lambda))$ as $L\to\infty$ and $B\to0$.
Many classes of active matter develop spatial memory by encoding information
in space, leading to complex pattern formation. It has been proposed that
spatial memory can lead to more efficient navigation and collective behaviour
in biological systems and influence the fate of synthetic systems. This raises
important questions about the fundamental properties of dynamical systems with
spatial memory. We present a framework based on mathematical billiards in which
particles remember their past trajectories and react to them. Despite the
simplicity of its fundamental deterministic rules, such a system is strongly
non-ergodic and exhibits highly-intermittent statistics, manifesting in complex
pattern formation. We show how these self-memory-induced complexities emerge
from the temporal change of topology and the consequent chaos in the system. We
study the fundamental properties of these billiards and particularly the
long-time behaviour when the particles are self-trapped in an arrested state.
We exploit numerical simulations of several millions of particles to explore
pattern formation and the corresponding statistics in polygonal billiards of
different geometries. Our work illustrates how the dynamics of a single-body
system can dramatically change when particles feature spatial memory and
provide a scheme to further explore systems with complex memory kernels.
We present Monte Carlo computer simulations for melts of semiflexible
randomly knotted and randomly concatenated ring polymers on the fcc lattice and
in slit confinement. Through systematic variation of the slit width at fixed
melt density, we first explore the influence of confinement on single-chain
conformations and inter-chain interactions. We demonstrate that confinement
makes chains globally larger and more elongated, while enhancing both contacts
and knottedness propensities. As for multi-chain properties, we show that
ring-ring contacts decrease with the confinement, yet neighbouring rings are
more overlapped as confinement grows. These aspects are reflected on the
decrease of the links formation between pairs of rings. The results suggest
that confinement can be used to fine-tune the mechanical properties of the
polymer network. In particular, confinement biases the synthesis of networks
that are softer to mechanical stress. Finally, in connection with a previous
study of us and recent simulations on two-dimensional polymer melts, our
findings suggest that entanglements in polymer melts arise from pairwise
ring-ring links alone.
Insights into the fundamental properties of graphene's Dirac-Weyl fermions
have emerged from studies of electron tunnelling transistors in which an
atomically thin layer of hexagonal boron nitride (hBN) is sandwiched between
two layers of high purity graphene. Here, we show that when a single defect is
present within the hBN tunnel barrier, it can inject electrons into the
graphene layers and its sharply defined energy level acts as a high resolution
spectroscopic probe of electron-electron interactions in graphene. We report a
magnetic field dependent suppression of the tunnel current flowing through a
single defect below temperatures of $\sim$ 2 K. This is attributed to the
formation of a magnetically-induced Coulomb gap in the spectral density of
electrons tunnelling into graphene due to electron-electron interactions.
Surfaces are able to control physical-chemical processes in multi-component
solution systems and, as such, find application in a wide range of
technological devices. Understanding the structure, dynamics and thermodynamics
of non-ideal solutions at surfaces, however, is particularly challenging. Here,
we use Constant Chemical Potential Molecular Dynamics simulations to gather
insight into aqueous NaCl solutions in contact with graphite surfaces at high
concentrations and under the effect of applied surface charges: conditions
where mean-field theories describing interfaces cannot be (typically) reliably
applied. We discover an asymmetric effect of surface charge on the double layer
structure and resulting thermodynamic properties, which can be explained by
considering the affinity of the surface for cations and anions and the
cooperative adsorption of ions that occurs at higher concentrations. We
characterise how the sign of the surface charge affects ion densities and water
structure in the double layer and how the capacitance of the interface - a
function of the electric potential drop across the double layer - is largely
insensitive to the bulk solution concentration. Notably, we find that
negatively charged graphite surfaces induce an increase in the size and
concentration of extended liquid-like ion clusters confined to the double
layer. Finally, we discuss how concentration and surface charge affect the
activity coefficients of ions and water in the double layer, demonstrating how
electric fields in this region should be explicitly considered when
characterising the thermodynamics of both solute and solvent at the
solid/liquid interface.
Chiral symmetry plays an indispensable role in topological classifications as
well as in the understanding of the origin of bulk or boundary flat bands. The
conventional definition of chiral symmetry refers to the existence of a
constant unitary matrix anticommuting with the Hamiltonian. As a constant
unitary matrix has constant eigenvectors, boundary flat bands enforced by
chiral symmetry, which share the same eigenvectors with the chiral symmetry
operator, are known to carry fixed (pseudo)spin polarizations and be
featureless in quantum geometry. In this work, we generalize the chiral
symmetry and introduce a concept termed sub-chiral symmetry. Unlike the
conventional chiral symmetry operator defined as constant, the sub-chiral
symmetry operator depends on partial components of the momentum vector, so as
its eigenvectors. We show that topological gapped or gapless systems without
the chiral symmetry but with the sub-chiral symmetry can support boundary flat
bands, which exhibit topological spin textures and quantized Berry phases. We
expect that such intriguing boundary flat bands could give rise to a variety of
exotic physics in the presence of interactions or disorders.
We present a novel theoretical approach to incorporate electronic
interactions in the study of two-dimensional topological insulators. By
exploiting the correspondence between edge state physics and entanglement
spectrum in gapped topological systems, we deconstruct the system into
one-dimensional channels. This framework enables a simple and elegant inclusion
of fermionic interactions into the discussion of topological insulators. We
apply this approach to the Kane-Mele model with interactions and magnetic
impurities.
Studying superconductivity in Dirac semimetals is an important step in
understanding quantum matter with topologically non-trivial order parameters.
We report on the properties of the superconducting phase in single crystals of
the Dirac material LaCuSb2 prepared by the self-flux method. We find that
chemical and hydrostatic pressure drastically suppress the superconducting
transition. Furthermore, due to large Fermi surface anisotropy, magnetization
and muon spin relaxation measurements reveal Type-II superconductivity for
applied magnetic fields along the $a$-axis, and Type-I superconductivity for
fields along the $c$-axis. Specific heat confirms the bulk nature of the
transition, and its deviation from single-gap $s$-wave BCS theory suggests
multigap superconductivity. Our tight-binding model points to an anisotropic
gap function arising from the spin-orbital texture near the Dirac nodes,
providing an explanation for the appearance of an anomaly in specific heat well
below $T_c$. Given the existence of superconductivity in a material harboring
Dirac fermions, LaCuSb2 proves an interesting material candidate in the search
for topological superconductivity.
High-entropy ceramics (HECs) are solid solutions of inorganic compounds with
one or more Wyckoff sites shared by equal or near-equal atomic ratios of
multi-principal elements. Material design and property tailoring possibilities
emerge from this new class of materials. Here, we report the discovery of
superconductivity around 2.35 K and topological properties in the
(Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2)C high-entropy carbide ceramic (HECC), which has not
been observed before in any of the investigated HECC. Density functional theory
calculations showed that six type-II Dirac points exist in
(Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2)C, which mainly contributed from the t2g orbitals of
transition metals and the p orbitals of C. Due to the stability of the
structure, we also observed robust superconductivity under pressure in this HEC
superconductor. This study expands the physical properties of HECs, which may
become a new material platform for superconductivity research, especially for
studying the coupling between superconductivity and topological physics.
Crystals and glasses differ by the amplitude and the temperature dependence
of their thermal conductivity. However, there are crystals known to display
glass-like thermal conductivity. Here, we show that EuTiO$_3$, a quantum
paraelectric known to order antiferromagnetically at 5.5 K, is one such system.
The temperature dependence of resistivity and Seebeck coefficient yield an
insulating band gap of $\sim 0.22$ eV. Thermal conductivity is drastically
reduced. Its amplitude and temperature dependence are akin to what is seen in
amorphous silica. Comparison with non-magnetic perovskite solids, SrTiO$_3$,
KTaO$_3$, and EuCoO$_3$, shows that what impedes heat transport are $4f$ spins
at Eu$^{2+}$ sites, which couple to phonons well above the ordering
temperature. Thus, in this case, superexchange and valence fluctuations, not
magnetic frustration, are the drivers of the glass-like thermal conductivity.
This manuscript explores the Darboux transformation employed in the
construction of exactly solvable models for pseudospin-one particles described
by the Dirac-type equation. We focus on the settings where a flat band of zero
energy is present in the spectrum of the initial system. Using the flat band
state as one of the seed solutions substantially improves the applicability of
the Darboux transformation, for it becomes necessary to ensure the Hermiticy of
the new Hamiltonians. This is illustrated explicitly in four examples, where we
show that the new Hamiltonians can describe quasi-particles in Lieb lattice
with inhomogeneous hopping amplitudes.
Ab initio calculation of dielectric response with high-accuracy electronic
structure methods is a long-standing problem, for which mean-field approaches
are widely used and electron correlations are mostly treated via approximated
functionals. Here we employ a neural network wavefunction ansatz combined with
quantum Monte Carlo to incorporate correlations into polarization calculations.
On a variety of systems, including isolated atoms, one-dimensional chains,
two-dimensional slabs, and three-dimensional cubes, the calculated results
outperform conventional density functional theory and are consistent with the
most accurate calculations and experimental data. Furthermore, we have studied
the out-of-plane dielectric constant of bilayer graphene using our method and
re-established its thickness dependence. Overall, this approach provides a
powerful tool to consider electron correlation in the modern theory of
polarization.
Thermal conductivity is a fundamental material property that plays an
essential role in technology, but its accurate evaluation presents a challenge
for theory. In this letter, we demonstrate the application of E(3)-equivariant
neutral network interatomic potentials within Green-Kubo formalism to determine
the lattice thermal conductivity in amorphous and crystalline materials. We
apply this method to study the thermal conductivity of germanium telluride
(GeTe) as a prototypical phase change material. A single deep learning
interatomic potential is able to describe the phase transitions between the
amorphous, rhombohedral and cubic phases, with critical temperatures in good
agreement with experiments. Furthermore, this approach accurately captures the
pronounced anharmonicity present in GeTe, enabling precise calculations of
thermal conductivity. In contrast, the Boltzmann transport equation tends to
overestimate it by approximately a factor of two in the crystalline phases.
Event-Chain Monte Carlo methods generate continuous-time and non-reversible
Markov processes which often display important accelerations compared to their
reversible counterparts. However their generalization to any system may appear
less straightforward. In this work, we build on the recent analytical
characterization of such methods as generating Piecewise Deterministic Markov
Processes (PDMP) to clearly decipher the necessary symmetries the PDMP must
obey from the sufficient ones which may prove to be too restrictive in a
general setting. Thus, we derive a necessary rotational invariance of the
probability flows and the minimum event rate, which identifies with the
corresponding infinitesimal rejection rate. Such conditions always yield a
correct ECMC scheme. We then generalize such results to the case of more
general deterministic flows than the translational ones. In particular, we
define two classes of interest of general flows, the ideal and uniform-ideal
ones, which respectively suppresses or reduces the event rates. From there, we
implement a complete non-reversible sampling of a systems of hard dimers,
thanks to the introduction of rotational flows, which are uniform-ideal and
shows a speed-up of up to ~3 compared to the state-of-the-art ECMC/Metropolis
hybrid scheme.
We present an environmentally benign methodology for the covalent
functionalization (arylation) of reduced graphene oxide (rGO) nanosheets with
arylazo sulfones. A variety of tagged aryl units were conveniently accommodated
at the rGO surface via visible light irradiation of suspensions of carbon
nanostructured materials in aqueous media. Mild reaction conditions, absence of
photosensitizers, functional group tolerance and high atomic fractions (XPS
analysis) represent some of the salient features characterizing the present
methodology. Control experiments for the mechanistic elucidation (Raman
analysis) and chemical nanomanipulation of the tagged rGO surfaces are also
reported.
In this paper, we study the ground state Quantum Fisher Information (QFI) in
one-dimensional spin-1 models, as witness to Multipartite Entanglement. The
models addressed are the Bilinear-Biquadratic model, the most general isotropic
SU(2)-invariant spin-1 chain, and the XXZ spin-1 chain, both with
nearest-neighbor interactions and open boundary conditions. We show that the
scaling of the QFI of strictly non-local observables can be used for
characterizing the phase diagrams and, in particular, for studying topological
phases, where it scales maximally. Analysing its behavior at the critical
phases we are also able to recover the scaling dimensions of the order
parameters both for local and string observables. The numerical results have
been obtained by exploiting the Density Matrix Renormalization Group algorithm
and Tensor Network techniques.
Optimization tasks are crucial in statistical machine learning. Recently,
there has been great interest in leveraging tools from dynamical systems to
derive accelerated and robust optimization methods via suitable discretizations
of continuous-time systems. However, these ideas have mostly been limited to
Euclidean spaces and unconstrained settings, or to Riemannian gradient flows.
In this work, we propose a dissipative extension of Dirac's theory of
constrained Hamiltonian systems as a general framework for solving optimization
problems over smooth manifolds, including problems with nonlinear constraints.
We develop geometric/symplectic numerical integrators on manifolds that are
"rate-matching," i.e., preserve the continuous-time rates of convergence. In
particular, we introduce a dissipative RATTLE integrator able to achieve
optimal convergence rate locally. Our class of (accelerated) algorithms are not
only simple and efficient but also applicable to a broad range of contexts.
Hexagonal boron nitride has already been proven to serve as a decent
substrate for high quality epitaxial growth of several 2D materials, such as
graphene, MoSe$_{\tiny{\textrm{2}}}$, MoS$_{\tiny{\textrm{2}}}$ or
WSe$_{\tiny{\textrm{2}}}$. Here, we present for the first time the molecular
beam epitaxy growth of MoTe$_{\tiny{\textrm{2}}}$ on atomically smooth
hexagonal boron nitride (hBN) substrate. Occurrence of
MoTe$_{\tiny{\textrm{2}}}$ in various crystalline phases such as distorted
octahedral 1T' phase with semimetal properties or hexagonal 2H phase with
semiconducting properties opens a possibility of realisation of crystal-phase
homostructures with tunable properties. Atomic force microscopy studies of
MoTe$_{\tiny{\textrm{2}}}$ grown in a single monolayer regime enable us to
determine surface morphology as a function of the growth conditions. The
diffusion constant of MoTe$_{\tiny{\textrm{2}}}$ grown on hBN can be altered 5
times by annealing after the growth, reaching about 5 $\cdot$ 10$^{-6}$
cm$^{2}$/s. Raman spectroscopy results suggest a coexistence of both 2H and 1T'
MoTe$_{\tiny{\textrm{2}}}$ phases in the studied samples.
The speed of light $c$ sets a strict upper bound on the speed of information
transfer in both classical and quantum systems. In nonrelativistic quantum
systems, the Lieb-Robinson Theorem imposes an emergent speed limit $v
\hspace{-0.2mm} \ll \hspace{-0.2mm} c$, establishing locality under unitary
evolution and constraining the time needed to perform useful quantum tasks. We
extend the Lieb-Robinson Theorem to quantum dynamics with measurements. In
contrast to the expectation that measurements can arbitrarily violate spatial
locality, we find at most an $(M \hspace{-0.5mm} +\hspace{-0.5mm} 1)$-fold
enhancement to the speed $v$ of quantum information, provided the outcomes of
measurements in $M$ local regions are known. This holds even when classical
communication is instantaneous, and extends beyond projective measurements to
weak measurements and other nonunitary channels. Our bound is asymptotically
optimal, and saturated by existing measurement-based protocols. We tightly
constrain the resource requirements for quantum computation, error correction,
teleportation, and generating entangled resource states (Bell, GHZ,
quantum-critical, Dicke, W, and spin-squeezed states) from
short-range-entangled initial states. Our results impose limits on the use of
measurements and active feedback to speed up quantum information processing,
resolve fundamental questions about the nature of measurements in quantum
dynamics, and constrain the scalability of a wide range of proposed quantum
technologies.
A water monolayer squeezed between two solid planes experiences strong
out-of-plane confinement effects while expanding freely within the plane. As a
consequence, the transport of such two-dimensional water combines hydrodynamic
and nanofluidic features, intimately linked with each other. In this paper, we
propose and explicitly solve a non-linear hydrodynamic equation describing
two-dimensional water flow with viscosity parameters deduced from molecular
dynamic simulations. We demonstrate that the very ability of two-dimensional
water to flow in short channels is governed by the second (dilatational)
viscosity coefficient, leading to flow compression and velocity saturation in
the high-pressure limit. The viscosity parameter values depend strongly on
whether graphene or hexoganal boron nitride layers are used to confine 2D water
that offers an interesting opportunity to obtain various nanofluids out of the
same water molecules just by using alternate materials to fabricate the 2D
channels.
On the Sb-layer of the Kagome superconductor CsV$_3$Sb$_5$, pair density wave
states have been observed. When the high-temperature charge orderings are
treated as static backgrounds, these PDW states exhibit the same wavevector in
the effective 2D Brillouin zone. Interestingly, these PDW states break the same
symmetry on the surface. Considering the presence of this non-degenerate PDW,
we investigate the implications for the possible existence of a vestigial
charge-4e phase with a non-zero center-of-mass momentum. To distinguish between
different vestigial phases, we propose scanning tunneling microscopy
experiments. We aim to provide insights into the nature of the vestigial phases
and their distinct characteristics in CsV$_3$Sb$_5$. This research sheds light
on the interplay between PDW states, charge orderings, and superconductivity of
the Kagome superconductor.
Solitonic symmetry has been believed to follow the homotopy-group
classification of topological solitons. Here, we point out a more sophisticated
algebraic structure when solitons of different dimensions coexist in the
spectrum. We uncover this phenomenon in a concrete quantum field theory, the
$4$d $\mathbb{C}P^1$ model. This model has two kinds of solitonic excitations,
vortices and hopfions, which would follow two $U(1)$ solitonic symmetries
according to homotopy groups. Nevertheless, we demonstrate the nonexistence of
the hopfion $U(1)$ symmetry by evaluating the hopfion charge of vortex
operators. We clarify that what conserves hopfion numbers is a non-invertible
symmetry generated by 3d spin topological quantum field theories (TQFTs). Its
invertible part is just $\mathbb{Z}_2$, which we recognize as a spin bordism
invariant. Compared with the 3d $\mathbb{C}P^1$ model, our work suggests a
unified description of solitonic symmetries and couplings to topological
phases.
Understanding the rich physics of magnetization dynamics in perpendicular
synthetic antiferromagnets (p-SAFs) is crucial for developing next-generation
spintronic devices. In this work, we systematically investigate the
magnetization dynamics in p-SAFs combining time-resolved magneto-optical Kerr
effect (TR-MOKE) measurements with theoretical modeling. These model analyses,
based on a Landau-Lifshitz-Gilbert approach incorporating exchange coupling,
provide details about the magnetization dynamic characteristics including the
amplitudes, directions, and phases of the precession of p-SAFs under varying
magnetic fields. These model-predicted characteristics are in excellent
quantitative agreement with TR-MOKE measurements on an asymmetric p-SAF. We
further reveal the damping mechanisms of two procession modes co-existing in
the p-SAF and successfully identify individual contributions from different
sources, including Gilbert damping of each ferromagnetic layer, spin pumping,
and inhomogeneous broadening. Such a comprehensive understanding of
magnetization dynamics in p-SAFs, obtained by integrating high-fidelity TR-MOKE
measurements and theoretical modeling, can guide the design of p-SAF-based
architectures for spintronic applications.
We discuss the codimension-1 defects of (2+1)D bosonic topological phases,
where the defects can support fermionic degrees of freedom. We refer to such
defects as fermionic defects, and introduce a certain subclass of invertible
fermionic defects called "gauged Gu-Wen SPT defects" that can shift
self-statistics of anyons. We derive a canonical form of a general fermionic
invertible defect, in terms of the fusion of a gauged Gu-Wen SPT defect and a
bosonic invertible defect decoupled from fermions on the defect. We then derive
the fusion rule of generic invertible fermionic defects. The gauged Gu-Wen SPT
defects give rise to interesting logical gates of stabilizer codes in the
presence of additional ancilla fermions. For example, we find a realization of
the CZ logical gate on the (2+1)D $\mathbb{Z}_2$ toric code stacked with a
(2+1)D ancilla trivial atomic insulator, which is implemented by a finite depth
circuit. We also investigate a gapped fermionic interface between (2+1)D
bosonic topological phases realized on the boundary of the (3+1)D Walker-Wang
model. In that case, the gapped interface can shift the chiral central charge
of the (2+1)D phase. Among these fermionic interfaces, we study an interesting
example where the (3+1)D phase has a spatial reflection symmetry, and the
fermionic interface is supported on a reflection plane that interpolates a
(2+1)D surface topological order and its orientation-reversal. We construct a
(3+1)D exactly solvable Hamiltonian realizing this setup, and find that the
model generates the $\mathbb{Z}_8$ classification of the (3+1)D invertible
phase with spatial reflection symmetry and fermion parity on the reflection
plane. We make contact with an effective field theory, known in literature as
the exotic invertible phase with spacetime higher-group symmetry.
At $n=3/4$ filling of the moir\'e flat band, transition metal dichalcogenide
moir\'e bilayers will develop kagome charge order. We derive an effective spin
model for the resulting localized spins and find that its further neighbor spin
interactions can be much less suppressed than the corresponding electron
hopping strength. Using density matrix renormalization group simulations, we
study its phase diagram and, for realistic model parameters relevant for
WSe$_2$/WS$_2$, we show that this material can realize the exotic chiral spin
liquid phase and the highly debated kagome spin liquid. Our work thus
demonstrates that the frustration and strong interactions present in TMD
heterobilayers provide an exciting platform to study spin liquid physics.
On the basis of density functional theory calculations we predict Weyl points
in rhombohedral structure of PtNiO$_2$ having symmorphic symmetry. From the
formation energy and phonon calculations, PtNiO$_2$ is found to be structurally
stable. The magnetic ground state is ferromagnetic with an effective magnetic
moment of 1.01 $\mu_B$ per unit cell. The electronic structure shows major
contributions from Pt-$5d$, Ni-$3d$ and O-$2p$ orbitals with band crossing
close to the Fermi level. The orbital contribution around 8 eV above the Fermi
level are from the Pt-$s,p$ orbitals forming a kagome like electronic structure
confirmed by surface Fermi surface spectral function. We found 20 pairs of
confirmed Weyl nodes along the magnetic easy axis [100]. These results are
expected to provide a useful and exciting platform for exploring and
understanding the magnetic Weyl physics in delafossites.
We study $\Gamma_3$ quadrupole orders in a face-centered cubic lattice. The
$\Gamma_3$ quadrupole moments under cubic symmetry possess a unique cubic
invariant in their free energy in the uniform ($q=0$) sector and the triple-q
sector for the X points $q=(2\pi,0,0),(0,2\pi,0)$, and $(0,0,2\pi)$.
Competition between this cubic anisotropy and anisotropic quadrupole-quadrupole
interactions causes a drastic impact on the phase diagram both in the ground
state and at finite temperatures. We show details about the model construction
and its properties, the phase diagram, and the mechanism of the various
triple-$q$ quadrupole orders reported in our preceding letter [J. Phys. Soc.
Jpn. 90, 43701 (2021), arXiv:2102.06346]. By using a mean-field approach, we
analyze a quadrupole exchange model that consists of a crystalline-electric
field scheme with the ground-state $\Gamma_3$ non-Kramers doublet and the
excited singlet $\Gamma_1$ state. We find various triple-$q$ orders in the
four-sublattice mean-field approximation. A few partial orders of quadrupoles
are stabilized in a wide range of parameter space at a higher transition
temperature than single-$q$ orders. With lowering the temperature, these
partial orders undergo phase transitions into further symmetry broken phases in
which nonvanishing quadrupole moments emerge at previously disordered sites.
The obtained phases in the mean-field approximation are investigated by a
phenomenological Landau theory, which clearly shows that the cubic invariant
plays an important role for stabilizing the triple-$q$ states. We also discuss
its implications for recent experiments in a few f- and d-electron compounds.
We theoretically study the energy and optical absorption spectra of
alternating twist multilayer graphene (ATMG) under a perpendicular electric
field. We obtain analytically the low-energy effective Hamiltonian of ATMG up
to pentalayer in the presence of the interlayer bias by means of first-order
degenerate-state perturbation theory, and present general rules for
constructing the effective Hamiltonian for an arbitrary number of layers. Our
analytical results agree to an excellent degree of accuracy with the numerical
calculations for twist angles $\theta \gtrsim 2.2^{\circ}$ that are larger than
the typical range of magic angles. We also calculate the optical conductivity
of ATMG and determine its characteristic optical spectrum, which is tunable by
the interlayer bias. When the interlayer potential difference is applied
between consecutive layers of ATMG, the Dirac cones at the two moir\'{e}
Brillouin zone corners $\bar{K}$ and $\bar{K}'$ acquire different Fermi
velocities, generally smaller than that of monolayer graphene, and the cones
split proportionally in energy resulting in a step-like feature in the optical
conductivity.
We numerically demonstrate the excitation of leaky spin waves (SWs) guided
along a ferromagnetic stripe by an obliquely incident SW beam on the thin film
edge placed below the stripe. During propagation, leaky waves emit energy back
to the layer in the form of plane waves and several laterally shifted parallel
SW beams. This resonance excitation, combined with interference effects of the
reflected and re-emitted waves, results in the magnonic Woods anomaly and
significant increase of the Goos-Hanchen shift magnitude. Hence, we provide a
unique platform to control SW reflection and to transfer SWs from a 2D platform
into the 1D guiding mode that can be used to form a transdimensional magnonic
router.
Many frustrated spin models on three-dimensional (3D) lattices are currently
being investigated, both experimentally and theoretically, and develop new
types of long-range orders in their respective phase diagrams. They present
finite-temperature phase transitions, most likely in the Heisenberg 3D
universality class. However, the combination between the 3D character and
frustration makes them hard to study. We present here several methods derived
from high-temperature series expansions (HTSEs), which give exact coefficients
directly in the thermodynamic limit up to a certain order; for several 3D
lattices, supplementary orders than in previous literature are reported for the
HTSEs. We introduce an interpolation method able to describe thermodynamic
quantities at $T > T_c$, which we use here to reconstruct the magnetic
susceptibility and the specific heat and to extract universal and non-universal
quantities (for example critical exponents, temperature, energy, entropy, and
other parameters related to the phase transition). While the susceptibility
associated with the order parameter is not usually known for more exotic
long-range orders, the specific heat is indicative of a phase transition for
any kind of symmetry breaking. We present examples of applications on
ferromagnetic and antiferromagnetic models on various 3D lattices and benchmark
our results whenever possible.
A (2+1)D topologically ordered phase may or may not have a gappable edge,
even if its chiral central charge $c_-$ is vanishing. Recently, it is
discovered that a quantity regarded as a ``higher'' version of chiral central
charge gives a further obstruction beyond $c_-$ to gapping out the edge. In
this Letter, we show that the higher central charges can be characterized by
the expectation value of the \textit{partial rotation} operator acting on the
wavefunction of the topologically ordered state. This allows us to extract the
higher central charge from a single wavefunction, which can be evaluated on a
quantum computer. Our characterization of the higher central charge is
analytically derived from the modular properties of edge conformal field
theory, as well as the numerical results with the $\nu=1/2$ bosonic Laughlin
state and the non-Abelian gapped phase of the Kitaev honeycomb model, which
corresponds to $\mathrm{U}(1)_2$ and Ising topological order respectively. The
letter establishes a numerical method to obtain a set of obstructions to the
gappable edge of (2+1)D bosonic topological order beyond $c_-$, which enables
us to completely determine if a (2+1)D bosonic Abelian topological order has a
gappable edge or not. We also point out that the expectation values of the
partial rotation on a single wavefunction put a constraint on the low-energy
spectrum of the bulk-boundary system of (2+1)D bosonic topological order,
reminiscent of the Lieb-Schultz-Mattis type theorems.
Maximally-localized Wannier functions (MLWFs) are a powerful and broadly used
tool to characterize the electronic structure of materials, from chemical
bonding to dielectric response to topological properties. Most generally, one
can construct MLWFs that describe isolated band manifolds, e.g. for the valence
bands of insulators, or entangled band manifolds, e.g. in metals or describing
both the valence and the conduction manifolds in insulators. Obtaining MLWFs
that describe a target manifold accurately and with the most compact
representation often requires chemical intuition and trial and error, a
challenging step even for experienced researchers and a roadblock for automated
high-throughput calculations. Here, we present a powerful approach that
automatically provides MLWFs spanning the occupied bands and their natural
complement for the empty states, resulting in Wannier Hamiltonian models that
provide a tight-binding picture of optimized atomic orbitals in crystals. Key
to the success of the algorithm is the introduction of a projectability measure
for each Bloch state onto atomic orbitals (here, chosen from the
pseudopotential projectors) that determines if that state should be kept
identically, discarded, or mixed into a disentangling algorithm. We showcase
the accuracy of our method by comparing a reference test set of 200 materials
against the selected-columns-of-the-density-matrix algorithm, and its
reliability by constructing Wannier Hamiltonians for 21737 materials from the
Materials Cloud.
When electrodynamics is quantized in a situation where the electrons exist
only at a flat surface such as graphene, one of the Maxwell equations appears
as a local part of the Hamiltonian. As a consequence of gauge invariance, any
physical state has to be a zero-energy state of the local Hamiltonian. We
construct two stationary quantum states; one reproduces scattering and
absorption of light, which is familiar in classical optics and the other is
more fundamentally related to photon creation. These two states are inseparable
by the Hamiltonian and forming a two-state system, but there is a special
number of surfaces for which two states are decoupled. The number is $2/\pi
\alpha$ where $\pi \alpha$ is the absorption probability of single surface.
We investigate hyperfine interaction (HFI) using density-functional theory
for several open-shell planar $sp^2$-carbon nanostructures displaying $\pi$
magnetism. Our prototype structures include both benzenoid ([$n$]triangulenes
and a graphene nanoribbon) as well as non-benzenoid (indene, fluorene, and
indene[2,1-b]fluorene) molecules. Our results obtained with ORCA indicate that
isotropic Fermi contact and anisotropic dipolar terms contribute in comparable
strength, rendering the HFI markedly anisotropic. We find that the magnitude of
HFI in these molecules can reach more than 100 MHz, thereby opening up the
possibility of experimental detection via methods such as electron spin
resonance-scanning tunneling microscopy (ESR-STM). Using these results, we
obtain empirical models based on $\pi$-spin polarizations at carbon sites.
These are defined by generic $sp^{2}$ HFI fit parameters which are derived by
matching the computed HFI couplings to $\pi$-spin polarizations computed with
methods such as ORCA, SIESTA, or mean-field Hubbard (MFH) models. This approach
successfully describes the Fermi contact and dipolar contributions for $^{13}$C
and $^{1}$H nuclei. These fit parameters allow to obtain hyperfine tensors for
large systems where existing methodology is not suitable or computationally too
expensive. As an example, we show how HFI scales with system size in
[$n$]triangulenes for large $n$ using MFH. We also discuss some implications of
HFI for electron-spin decoherence and for coherent nuclear dynamics.
Most high-$T_c$ superconductors are spatially inhomogeneous. Usually, this
heterogeneity originates from the interplay of various types of electronic
ordering. It affects various superconducting properties, such as the transition
temperature, the magnetic upper critical field, the critical current, etc. In
this paper, we analyze the parameters of spatial phase segregation during the
first-order transition between superconductivity (SC) and a charge- or
spin-density wave state in quasi-one-dimensional metals with imperfect nesting,
typical of organic superconductors. An external pressure or another driving
parameter increases the transfer integrals in electron dispersion, which only
slightly affects SC but violates the Fermi surface nesting and suppresses the
density wave (DW). At a critical pressure $P_{c}$, the transition from a DW to
SC occurs. We estimate the characteristic size of superconducting islands
during this phase transition in organic metals in two ways. Using the
Ginzburg-Landau expansion, we analytically obtain a lower bound for the size of
SC domains. To estimate a more specific interval of the possible size of the
superconducting islands in (TMTSF)$_2$PF$_6$ samples, we perform numerical
calculations of the percolation probability via SC domains and compare the
results with experimental resistivity data. This helps to develop a consistent
microscopic description of SC spatial heterogeneity in various organic
superconductors.
The K\"ahler-Dirac fermion, recognized as an elegant geometric approach,
offers an alternative to traditional representations of relativistic fermions.
Recent studies have demonstrated that symmetric mass generation (SMG) can
precisely occur with two copies of K\"ahler-Dirac fermions across any spacetime
dimensions. This conclusion stems from the study of anomaly cancellation within
the fermion system. Our research provides an alternative understanding of this
phenomenon from a condensed matter perspective, by associating the interacting
K\"ahler-Dirac fermion with the boundary of bosonic symmetry-protected
topological (SPT) phases. We show that the low-energy bosonic fluctuations in a
single copy of the K\"ahler-Dirac fermion can be mapped to the boundary modes
of a $\mathbb{Z}_2$-classified bosonic SPT state, protected by an inversion
symmetry universally across all dimensions. This implies that two copies of
K\"ahler-Dirac fermions can always undergo SMG through interactions mediated by
these bosonic modes. This picture aids in systematically designing SMG
interactions for K\"ahler-Dirac fermions in any dimension. We present the exact
lattice Hamiltonian of these interactions and validate their efficacy in
driving SMG.

Date of feed: Thu, 06 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]+) **Polar coherent states in bilayer graphene under a constant uniform magnetic field. (arXiv:2307.01213v1 [cond-mat.mes-hall])**

D.I. Martínez Moreno, J. Negro, L.M. Nieto

**Unveiling Real Triple Degeneracies in Crystals: Exploring Link and Compound Structures. (arXiv:2307.01228v1 [cond-mat.mes-hall])**

Wenwen Liu, Hanyu Wang, Biao Yang, Shuang Zhang

**Geometric Stiffness in Interlayer Exciton Condensates. (arXiv:2307.01253v1 [cond-mat.mes-hall])**

Nishchhal Verma, Daniele Guerci, Raquel Queiroz

**Nontrivial worldline winding in non-Hermitian quantum systems. (arXiv:2307.01260v1 [quant-ph])**

Shi-Xin Hu, Yongxu Fu, Yi Zhang

**Symmetry fractionalization, mixed-anomalies and dualities in quantum spin models with generalized symmetries. (arXiv:2307.01266v1 [cond-mat.str-el])**

Heidar Moradi, Ömer M. Aksoy, Jens H. Bardarson, Apoorv Tiwari

**Sequential Quantum Circuits as Maps between Gapped Phases. (arXiv:2307.01267v1 [cond-mat.str-el])**

Xie Chen, Arpit Dua, Michael Hermele, David T. Stephen, Nathanan Tantivasadakarn, Robijn Vanhove, Jing-Yu Zhao

**High-Strength Amorphous Silicon Carbide for Nanomechanics. (arXiv:2307.01271v1 [cond-mat.mes-hall])**

Minxing Xu, Dongil Shin, Paolo M. Sberna, Roald van der Kolk, Andrea Cupertino, Miguel A. Bessa, Richard A. Norte

**Wavefunction tomography of topological dimer chains with long-range couplings. (arXiv:2307.01283v1 [physics.optics])**

F. Pellerin, R. Houvenaghel, W. A. Coish, I. Carusotto, P. St-Jean

**Charge-polarization coupling in the nanostructure "thin Hf$_x$Zr$_{1-x}$O$_2$ film - graphene". (arXiv:2307.01363v1 [cond-mat.mtrl-sci])**

Anna N. Morozovska, Maksym V. Strikha, Kyle P. Kelley, Sergei V. Kalinin, Eugene A. Eliseev

**Normal state magneto transport properties of FeSe$_{0.5}$Te$_{0.5}$ superconductor: The role of topological surface states. (arXiv:2307.01476v1 [cond-mat.supr-con])**

M.M. Sharma, N. K. Karn, V.P.S. Awana (Csir-Npl, India)

**Electrical conductivity of crack-template-based transparent conductive films: A computational point of view. (arXiv:2307.01509v1 [cond-mat.dis-nn])**

Yuri Yu. Tarasevich, Andrei V. Eserkepov, Irina V. Vodolazskaya

**Efficient computation of optical excitations in two-dimensional materials with the Xatu code. (arXiv:2307.01572v1 [cond-mat.mtrl-sci])**

Alejandro José Uría-Álvarez, Juan José Esteve-Paredes, Manuel Antonio García-Blázquez, Juan José Palacios

**Logarithmically enhanced area-laws for fermions in vanishing magnetic fields in dimension two. (arXiv:2307.01699v1 [math-ph])**

Paul Pfeiffer, Wolfgang Spitzer

**Billiards with Spatial Memory. (arXiv:2307.01734v1 [nlin.CD])**

Thijs Albers, Stijn Delnoij, Nico Schramma, Maziyar Jalaal

**Spatial organization of slit-confined melts of ring polymers with non-conserved topology: A lattice Monte Carlo study. (arXiv:2307.01739v1 [cond-mat.soft])**

Mattia Alberto Ubertini, Angelo Rosa

**A magnetically-induced Coulomb gap in graphene due to electron-electron interactions. (arXiv:2307.01757v1 [cond-mat.mes-hall])**

E.E. Vdovin, M.T. Greenaway, Yu.N. Khanin, S.V. Morozov, O. Makarovsky, A. Patanè, A. Mishchenko, S. Slizovskiy, V.I. Fal'ko, A.K. Geim, K.S. Novoselov, L. Eaves

**Properties of aqueous electrolyte solutions at carbon electrodes: effects of concentration and surface charge on solution structure, ion clustering and thermodynamics in the electric double layer. (arXiv:2307.01758v1 [cond-mat.soft])**

Aaron R. Finney, Matteo Salvalaglio

**Boundary Flat Bands with Topological Spin Textures Protected by Sub-chiral Symmetry. (arXiv:2307.01851v1 [cond-mat.mtrl-sci])**

Yijie Mo, Xiao-Jiao Wang, Rui Yu, Zhongbo Yan

**From Edge State Physics to Entanglement Spectrum: Studying Interactions and Impurities in Two-Dimensional Topological Insulators. (arXiv:2307.01913v1 [cond-mat.mes-hall])**

Marcela Derli, E. Novais

**Fragile superconductivity in a Dirac metal. (arXiv:2307.01976v1 [cond-mat.supr-con])**

Chris J. Lygouras, Junyi Zhang, Jonah Gautreau, Mathew Pula, Sudarshan Sharma, Shiyuan Gao, Tanya Berry, Thomas Halloran, Peter Orban, Gael Grissonnanche, Juan R. Chamorro, Kagetora Mikuri, Dilip K. Bhoi, Maxime A. Siegler, Kenneth K. Livi, Yoshiya Uwatoko, Satoru Nakatsuji, B. J. Ramshaw, Yi Li, Graeme M. Luke, Collin L. Broholm, Tyrel M. McQueen

**Discovery of the high-entropy carbide ceramic topological superconductor candidate (Ti0.2Zr0.2Nb0.2Hf0.2Ta0.2)C. (arXiv:2307.02020v1 [cond-mat.supr-con])**

Lingyong Zeng, Zequan Wang, Jing Song, Gaoting Lin, Ruixin Guo, Si-Chun Luo, Shu Guo, Kuan Li, Peifei Yu, Chao Zhang, Wei-Ming Guo, Jie Ma, Yusheng Hou, Huixia Luo

**Glass-like thermal conductivity and narrow insulating gap of EuTiO$_3$. (arXiv:2307.02058v1 [cond-mat.mtrl-sci])**

Alexandre Jaoui, Shan Jiang, Xiaokang Li, Yasuhide Tomioka, Isao H. Inoue, Johannes Engelmayer, Rohit Sharma, Lara Pätzold, Thomas Lorenz, Benoît Fauqué, Kamran Behnia

**Reflectionless pseudospin-1 Dirac systems via Darboux transformation and flat band solutions. (arXiv:2307.02123v1 [quant-ph])**

Vit Jakubsky, Kevin Zelaya

**Electric Polarization from Many-Body Neural Network Ansatz. (arXiv:2307.02212v1 [physics.chem-ph])**

Xiang Li, Yubing Qian, Ji Chen

**Equivariant graph neural network interatomic potential for Green-Kubo thermal conductivity in phase change materials. (arXiv:2307.02327v1 [cond-mat.mtrl-sci])**

Sung-Ho Lee, Jing Li, Valerio Olevano, Benoit Sklénard

**Necessary and sufficient symmetries in Event-Chain Monte Carlo with generalized flows and Application to hard dimers. (arXiv:2307.02341v1 [cond-mat.stat-mech])**

Tristan Guyon, Arnaud Guillin, Manon Michel

**Visible-Light Assisted Covalent Surface Functionalization of Reduced Graphene Oxide Nanosheets with Arylazo Sulfones. (arXiv:2307.02353v1 [cond-mat.mes-hall])**

Lorenzo Lombardi, Alessandro Kovtun, Sebastiano Mantovani, Giulio Bertuzzi, Laura Favaretto, Cristian Bettini, Vincenzo Palermo, Manuela Melucci, Marco Bandini

**Quantum Fisher Information and multipartite entanglement in spin-1 chains. (arXiv:2307.02407v1 [quant-ph])**

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

**Optimization on manifolds: A symplectic approach. (arXiv:2107.11231v2 [cond-mat.stat-mech] UPDATED)**

Guilherme França, Alessandro Barp, Mark Girolami, Michael I. Jordan

**Molecular Beam Epitaxy growth of MoTe$_2$ on Hexagonal Boron Nitride. (arXiv:2111.12433v4 [cond-mat.mtrl-sci] UPDATED)**

Bartłomiej Seredyński, Rafał Bożek, Jan Suffczyński, Justyna Piwowar, Janusz Sadowski, Wojciech Pacuski

**Locality and error correction in quantum dynamics with measurement. (arXiv:2206.09929v4 [quant-ph] UPDATED)**

Aaron J. Friedman, Chao Yin, Yifan Hong, Andrew Lucas

**Two-dimensional non-linear hydrodynamics and nanofluidics. (arXiv:2207.02870v2 [cond-mat.mtrl-sci] UPDATED)**

Maxim Trushin, Alexandra Carvalho, A. H. Castro Neto

**Non-degenerate surface pair density wave in the Kagome superconductor CsV$_3$Sb$_5$ -- application to vestigial orders. (arXiv:2210.00023v3 [cond-mat.supr-con] UPDATED)**

Yue Yu

**Solitonic symmetry beyond homotopy: Invertibility from bordism and noninvertibility from topological quantum field theory. (arXiv:2210.13780v4 [hep-th] UPDATED)**

Shi Chen, Yuya Tanizaki

**Magnetization Dynamics in Synthetic Antiferromagnets with Perpendicular Magnetic Anisotropy. (arXiv:2211.07744v2 [cond-mat.mes-hall] UPDATED)**

Dingbin Huang, Delin Zhang, Yun Kim, Jian-Ping Wang, Xiaojia Wang

**Fermionic defects of topological phases and logical gates. (arXiv:2211.12394v2 [cond-mat.str-el] UPDATED)**

Ryohei Kobayashi

**Kagome chiral spin liquid in transition metal dichalcogenide moir\'e bilayers. (arXiv:2211.15696v2 [cond-mat.str-el] UPDATED)**

Johannes Motruk, Dario Rossi, Dmitry A. Abanin, Louk Rademaker

**Weyl Metal Phase in Delafossite Oxide PtNiO$_2$. (arXiv:2212.00579v2 [cond-mat.mtrl-sci] UPDATED)**

Gang Bahadur Acharya, Mohan Bikram Neupane, Rojila Ghimire, Madhav Prasad Ghimire

**Quadrupole partial orders and triple-$q$ states on the face-centered cubic lattice. (arXiv:2212.12920v2 [cond-mat.str-el] UPDATED)**

Kazumasa Hattori, Takayuki Ishitobi, Hirokazu Tsunetsugu

**Electronic structure of biased alternating-twist multilayer graphene. (arXiv:2212.14541v2 [cond-mat.mes-hall] UPDATED)**

Kyungjin Shin, Yunsu Jang, Jiseon Shin, Jeil Jung, Hongki Min

**Advanced magnon-optic effects with spin-wave leaky modes. (arXiv:2302.11507v3 [cond-mat.mes-hall] UPDATED)**

Krzysztof Sobucki, Wojciech Śmigaj, Piotr Graczyk, Maciej Krawczyk, and Paweł Gruszecki

**Finite-temperature phase transitions in $S=1/2$ three-dimensional Heisenberg magnets from high-temperature series expansions. (arXiv:2303.03135v3 [cond-mat.str-el] UPDATED)**

M. G. Gonzalez, B. Bernu, L. Pierre, L. Messio

**Extracting higher central charge from a single wave function. (arXiv:2303.04822v3 [cond-mat.str-el] UPDATED)**

Ryohei Kobayashi, Taige Wang, Tomohiro Soejima, Roger S. K. Mong, Shinsei Ryu

**Projectability disentanglement for accurate and automated electronic-structure Hamiltonians. (arXiv:2303.07877v2 [physics.comp-ph] UPDATED)**

Junfeng Qiao, Giovanni Pizzi, Nicola Marzari

**Stationary Two-State System in Optics using Layered Materials. (arXiv:2303.08395v2 [quant-ph] UPDATED)**

Ken-ichi Sasaki

**Hyperfine interactions in open-shell planar $sp^2$-carbon nanostructures. (arXiv:2303.11422v2 [cond-mat.mes-hall] UPDATED)**

Sanghita Sengupta, Thomas Frederiksen, Geza Giedke

**On the size of superconducting islands on the density-wave background in organic metals. (arXiv:2305.14510v2 [cond-mat.supr-con] UPDATED)**

Vladislav D. Kochev, Seidali S. Seidov, Pavel D. Grigoriev

**Symmetric Mass Generation of K\"ahler-Dirac Fermions from the Perspective of Symmetry-Protected Topological Phases. (arXiv:2306.17420v2 [cond-mat.str-el] UPDATED)**

Yuxuan Guo, Yi-Zhuang You

Found 18 papers in prb We demonstrate the existence and study in detail the features of chiral bimerons which are static solutions in an easy-plane magnet with the Dzyaloshinskii-Moriya interaction. These are skyrmionic textures with an integer topological charge, and they present essential analogies to the meron configur… For decades, van Roosbroeck’s (VR) equations have been used to model microelectronic devices made from ordinary semiconductors. The advent of topological materials raises a largely unexplored question: how are VR equations and their solutions modified when electronic bands are topological? Here, the authors solve VR equations analytically in a Weyl semimetal placed under a magnetic field and subjected to a spatially inhomogeneous light pulse. They predict photoinduced plasma oscillations, which originate from a topological term in VR equations. Using spin currents generated by fs laser pulses, we demonstrate excitation of GHz ferromagnetic resonance and THz ferrimagnetic exchange resonances in Co/Gd/Co/Gd multilayers by time-resolved magneto-optic Kerr effect measurements. Varying the Gd layer thickness allows for a tuning of the resonance… The electrical control of magnons opens up new ways to transport and process information for logic devices. In magnetoelectrical multiferroics, the Dzyaloshinskii-Moriya (DM) interaction directly allows for such control and hence is of major importance. We determine the origin and the strength of th… The conventional Bardeen-Cooper-Schrieffer model of superconductivity assumes a frequency-independent order parameter, which allows a relatively simple description of the superconducting state. In particular, its excitation spectrum readily follows from the Bogoliubov–de Gennes (BdG) equations. A mo… We investigate the formation mechanism of the recently proposed interlayer electronic superfluid state due to repulsive interaction in graphene double layers. Using the renormalization group argumentation we show how the emergence of a particular interlayer staggered order parameter wins the competi… The magnetic, electronic, and thermal properties of ${\mathrm{Fe}}_{3}{\mathrm{Ge}}_{2}\mathrm{Sb}$ single crystals, a derivative of the hexagonal FeGe structure with a buckled Fe kagome net and Sb-Sb dimers are reported. Electronic structure calculations show most of the kagome-derived bands remain… In recent years the ergodicity of disordered spin chains has been investigated via extensive numerical studies of the level statistics or the transport properties. However, a clear relationship between these results has yet to be established. We present the relation between the diffusion constant an… We show that anomalous Floquet topological insulators generate intrinsic, non-Hermitian topology on their boundaries. As a consequence, removing a boundary hopping from the time-evolution operator stops the propagation of chiral edge modes, leading to a non-Hermitian skin effect. This does not occur… The experimental evidence of the ultrahigh electron mobility and strong spin-orbit coupling in the two-dimensional (2D) layered bismuth-based oxyselenide, ${\mathrm{Bi}}_{2}{\mathrm{O}}_{2}\mathrm{Se}$, makes it a potential material for spintronic devices. However, its spin-related properties have n… Recently, electron transport along chiral molecules has been attracting extensive interest and a number of intriguing phenomena have been reported in recent experiments, such as the emergence of zero-bias conductance peaks in the transmission spectrum upon the adsorption of single-helical protein on… Superexchange is one of the vital resources to realize long-range interaction between distant spins for large-scale quantum computing. Recent experiments have demonstrated coherent oscillations between logical states defined by remote spins whose coupling is given by the superexchange interaction me… Bloch waves in one-dimensional periodic systems carry the Zak phase, which plays a key role in determining the band topology. In general, for a system that possesses inversion symmetry, the Zak phase of an isolated band is quantized as 0 or $π$ and is associated with the spatial-field symmetries of … We explore the effect of heat treatment in argon atmosphere under various temperatures up to $500{\phantom{\rule{0.16em}{0ex}}}^{∘}\mathrm{C}$ on single crystals of $α\text{−}{\mathrm{RuCl}}_{3}$ by the study of the mass loss, microprobe energy-dispersive x-ray spectroscopy, powder x-ray diffraction… Recent studies have demonstrated that measures of tripartite entanglement can probe data characterizing topologically ordered phases to which bipartite entanglement is insensitive. Motivated by these observations, we compute the reflected entropy and logarithmic negativity, a mixed-state entanglemen… We theoretically study magnetic ground states of doped zigzag graphene nanoribbons and the emergence of topological domain walls. Using the Hartree-Fock mean-field approach and an effective continuum model, we demonstrated that the carrier doping stabilizes a magnetic structure with alternating anti… In this work, a generalized force-field methodology for the relaxation of large moiré heterostructures is proposed. The force-field parameters are optimized to accurately reproduce the structural degrees of freedom of some computationally manageable cells relaxed using density functional theory. The… We investigate the total energies of spontaneous spin-valley polarized states in bi-, tri-, and tetralayer rhombohedral graphene where the long-range Coulomb correlations are accounted for within the random phase approximation. Our analysis of the phase diagrams for varying carrier doping and perpen…

Date of feed: Thu, 06 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]+) **Meron configurations in easy-plane chiral magnets**

David Bachmann, Michail Lianeris, and Stavros Komineas

Author(s): David Bachmann, Michail Lianeris, and Stavros Komineas

[Phys. Rev. B 108, 014402] Published Wed Jul 05, 2023

**Van Roosbroeck's equations with topological terms: The case of Weyl semimetals**

Pierre-Antoine Graham, Simon Bertrand, Michaël Bédard, Robin Durand, and Ion Garate

Author(s): Pierre-Antoine Graham, Simon Bertrand, Michaël Bédard, Robin Durand, and Ion Garate

[Phys. Rev. B 108, 024301] Published Wed Jul 05, 2023

**Exploring terahertz-scale exchange resonances in synthetic ferrimagnets with ultrashort optically induced spin currents**

Julian Hintermayr, Youri L. W. van Hees, and Bert Koopmans

Author(s): Julian Hintermayr, Youri L. W. van Hees, and Bert Koopmans

[Phys. Rev. B 108, 024401] Published Wed Jul 05, 2023

**Spin-current driven Dzyaloshinskii-Moriya interaction in multiferroic ${\mathrm{BiFeO}}_{3}$ from first principles**

Sebastian Meyer, Bin Xu, Matthieu J. Verstraete, Laurent Bellaiche, and Bertrand Dupé

Author(s): Sebastian Meyer, Bin Xu, Matthieu J. Verstraete, Laurent Bellaiche, and Bertrand Dupé

[Phys. Rev. B 108, 024403] Published Wed Jul 05, 2023

**Dark Andreev states in superconductors**

Andrey Grankin and Victor Galitski

Author(s): Andrey Grankin and Victor Galitski

[Phys. Rev. B 108, 024501] Published Wed Jul 05, 2023

**Interlayer electronic superfluid in an external magnetic field in graphene double layers**

Andreas Sinner

Author(s): Andreas Sinner

[Phys. Rev. B 108, 024502] Published Wed Jul 05, 2023

**Magnetic, electronic, and thermal properties of buckled kagome ${\mathrm{Fe}}_{3}{\mathrm{Ge}}_{2}\mathrm{Sb}$**

Quinn D. Gibson, Ramzy Daou, Marco Zanella, Jonathan Alaria, and Matthew J. Rosseinsky

Author(s): Quinn D. Gibson, Ramzy Daou, Marco Zanella, Jonathan Alaria, and Matthew J. Rosseinsky

[Phys. Rev. B 108, 035102] Published Wed Jul 05, 2023

**Slow diffusion and Thouless localization criterion in modulated spin chains**

P. Prelovšek, J. Herbrych, and M. Mierzejewski

Author(s): P. Prelovšek, J. Herbrych, and M. Mierzejewski

[Phys. Rev. B 108, 035106] Published Wed Jul 05, 2023

**Mixed higher-order topology: Boundary non-Hermitian skin effect induced by a Floquet bulk**

Hui Liu and Ion Cosma Fulga

Author(s): Hui Liu and Ion Cosma Fulga

[Phys. Rev. B 108, 035107] Published Wed Jul 05, 2023

**Emergence of Rashba spin valley state in two-dimensional strained bismuth oxychalcogenides ${\mathrm{Bi}}_{2}{\mathrm{O}}_{2}\mathrm{Se}$**

Muhammad Darwis Umar, Lalu Dalilul Falihin, Arief Lukmantoro, Harsojo, and Moh. Adhib Ulil Absor

Author(s): Muhammad Darwis Umar, Lalu Dalilul Falihin, Arief Lukmantoro, Harsojo, and Moh. Adhib Ulil Absor

[Phys. Rev. B 108, 035109] Published Wed Jul 05, 2023

**Topologically nontrivial and trivial zero modes in chiral molecules**

Xiao-Feng Chen, Wenchen Luo, Tie-Feng Fang, Yossi Paltiel, Oded Millo, Ai-Min Guo, and Qing-Feng Sun

Author(s): Xiao-Feng Chen, Wenchen Luo, Tie-Feng Fang, Yossi Paltiel, Oded Millo, Ai-Min Guo, and Qing-Feng Sun

[Phys. Rev. B 108, 035401] Published Wed Jul 05, 2023

**Universal control of superexchange in linear triple quantum dots with an empty mediator**

Guo Xuan Chan, Peihao Huang, and Xin Wang

Author(s): Guo Xuan Chan, Peihao Huang, and Xin Wang

[Phys. Rev. B 108, 035402] Published Wed Jul 05, 2023

**Determination of the Zak phase of one-dimensional diffractive systems with inversion symmetry via radiation in Fourier space**

C. Liu, H. R. Wang, and H. C. Ong

Author(s): C. Liu, H. R. Wang, and H. C. Ong

[Phys. Rev. B 108, 035403] Published Wed Jul 05, 2023

**Thermal decomposition of the Kitaev material $α\text{−}{\mathrm{RuCl}}_{3}$ and its influence on low-temperature behavior**

Franziska A. Breitner, Anton Jesche, Vladimir Tsurkan, and Philipp Gegenwart

Author(s): Franziska A. Breitner, Anton Jesche, Vladimir Tsurkan, and Philipp Gegenwart

[Phys. Rev. B 108, 045103] Published Wed Jul 05, 2023

**Entanglement in tripartitions of topological orders: A diagrammatic approach**

Ramanjit Sohal and Shinsei Ryu

Author(s): Ramanjit Sohal and Shinsei Ryu

[Phys. Rev. B 108, 045104] Published Wed Jul 05, 2023

**Topological domain walls in graphene nanoribbons with carrier doping**

Takuto Kawakami, Gen Tamaki, and Mikito Koshino

Author(s): Takuto Kawakami, Gen Tamaki, and Mikito Koshino

[Phys. Rev. B 108, 045401] Published Wed Jul 05, 2023

**Accurate force-field methodology capturing atomic reconstructions in transition metal dichalcogenide moiré system**

Carl Emil Mørch Nielsen, Miguel da Cruz, Abderrezak Torche, and Gabriel Bester

Author(s): Carl Emil Mørch Nielsen, Miguel da Cruz, Abderrezak Torche, and Gabriel Bester

[Phys. Rev. B 108, 045402] Published Wed Jul 05, 2023

**Chirality and correlations in the spontaneous spin-valley polarization of rhombohedral multilayer graphene**

Yunsu Jang, Youngju Park, Jeil Jung, and Hongki Min

Author(s): Yunsu Jang, Youngju Park, Jeil Jung, and Hongki Min

[Phys. Rev. B 108, L041101] Published Wed Jul 05, 2023

Found 1 papers in prl In twisted $h\text{−}\mathrm{BN}/\text{graphene}$ heterostructures, the complex electronic properties of the fast-traveling electron gas in graphene are usually considered to be fully revealed. However, the randomly twisted heterostructures may also have unexpected transition behaviors, which may in…

Date of feed: Thu, 06 Jul 2023 03:17:06 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]+) **Tunable Interband Transitions in Twisted $h\text{−}\mathrm{BN}/\text{Graphene}$ Heterostructures**

Bingyao Liu, Yu-Tian Zhang, Ruixi Qiao, Ruochen Shi, Yuehui Li, Quanlin Guo, Jiade Li, Xiaomei Li, Li Wang, Jiajie Qi, Shixuan Du, Xinguo Ren, Kaihui Liu, Peng Gao, and Yu-Yang Zhang

Author(s): Bingyao Liu, Yu-Tian Zhang, Ruixi Qiao, Ruochen Shi, Yuehui Li, Quanlin Guo, Jiade Li, Xiaomei Li, Li Wang, Jiajie Qi, Shixuan Du, Xinguo Ren, Kaihui Liu, Peng Gao, and Yu-Yang Zhang

[Phys. Rev. Lett. 131, 016201] Published Wed Jul 05, 2023

Found 1 papers in pr_res Recently it has been discovered that in Weyl semimetals the

Date of feed: Thu, 06 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]+) **Berry curvature associated to Fermi arcs in continuum and lattice Weyl systems**

Dennis Wawrzik and Jeroen van den Brink

Author(s): Dennis Wawrzik and Jeroen van den Brink*surface* state Berry curvature can diverge in certain regions of momentum. This occurs in a continuum description of tilted Weyl cones, which for a slab geometry results in the Berry curvature dipole associated to the surface Fermi arcs grow…

[Phys. Rev. Research 5, 033007] Published Wed Jul 05, 2023