Found 33 papers in cond-mat Scar eigenstates in a many-body system refers to a small subset of
non-thermal finite energy density eigenstates embedded into an otherwise
thermal spectrum. This novel non-thermal behaviour has been seen in recent
experiments simulating a one-dimensional PXP model with a
kinetically-constrained local Hilbert space realized by a chain of Rydberg
atoms. We probe these small sets of special eigenstates starting from
particular initial states by computing the spread complexity associated to time
evolution of the PXP hamiltonian. Since the scar subspace in this model is
embedded only loosely, the scar states form a weakly broken representation of
the Lie Algebra. We demonstrate why a careful usage of the Forward Scattering
Approximation (or similar strategies thereof) is required to extract an
appropriate set of Lanczos coefficients in this case as the consequence of this
approximate symmetry. This leads to a well defined notion of a closed Krylov
subspace and consequently, that of spread complexity. We show how the spread
complexity shows approximate revivals starting from both $|\mathbb{Z}_2\rangle$
and $|\mathbb{Z}_3\rangle$ states and how these revivals can be made more
accurate by adding optimal perturbations to the bare Hamiltonian. We also
investigate the case of the vacuum as the initial state, where revivals can be
stabilized using an iterative process of adding few-body terms.
Electrons can organize themselves into charge-ordered states to minimize the
effects of long-ranged Coulomb interactions. In the presence of a lattice,
commensurability constraints lead to the emergence of incompressible
Wigner-Mott (WM) insulators at various rational electron fillings, $\nu~=p/q$.
The mechanism for quantum fluctuation-mediated melting of the WM insulators
with increasing electron kinetic energy remains an outstanding problem. Here we
analyze numerically the bandwidth-tuned transition out of the WM insulator at
$\nu=1/5$ on infinite cylinders with varying circumference. For the two-leg
ladder, the transition from the WM insulator to the Luttinger liquid proceeds
via a distinct intermediate gapless phase -- the Luther-Emery liquid. We place
these results in the context of a low-energy bosonization based theory for the
transition. We also comment on the bandwidth-tuned transition(s) on the
five-leg cylinder, and connections to ongoing experiments in dual-gated bilayer
moir\'e transition metal dichalcogenide materials.
In this work we investigate the ground state of a momentum-confined
interacting 2D electron gas, a momentum-space analog of an infinite quantum
well. The study is performed by combining analytical results with a numerical
exact diagonalization procedure. We find a ferromagnetic ground state near a
particular electron density and for a range of effective electron (or hole)
masses. We argue that this observation may be relevant to the generalized
Stoner ferromagnetism recently observed in multilayer graphene systems. The
collective magnon excitations exhibit a linear dispersion, which originates
from a diverging spin stiffness.
We present numerical evidence for a new paradigm in one-dimensional
interacting fermion systems, whose phenomenology has traits of both, Luttinger
liquids and Fermi liquids. This new state, dubbed a quasi-Fermi liquid,
possesses a discontinuity in its fermion occupation number at the Fermi
momentum. The excitation spectrum presents particle-like quasiparticles, and
absence of hole-like quasiparticles, giving rise instead to edge singularities.
Such a state is realized in a one-dimensional spinless fermion lattice
Hamiltonian by fine-tuning the interactions to a regime where they become
irrelevant in the renormalization group sense. We show, using uniform infinite
matrix products states and finite-entanglement scaling analysis, that the
system ground state is characterized by a Luttinger parameter $K = 1$ and a
discontinuous jump in the fermion occupation number. We support the
characterization with calculations of the spectral function, that show a
particle-hole asymmetry reflected in the existence of well-defined Landau
quasiparticles above the Fermi level, and edge singularities without the
associated quasiparticles below. These results indicate that the quasi-Fermi
liquid paradigm can be realized beyond the low-energy perturbative realm.
Recently non-chiral spin structures on the surface of the van der Waals (vdW)
magnets have been observed down to monolayers. We provide a Hamiltonian to
analyze the electronic properties of these materials. The Hamiltonian takes
into account the arbitrary background spin structures and large atomic spin $S$
of the materials. The large spin-\emph{S} treatment is necessary as magnetic
atoms of the vdW magnets can have spin $S > 1/2$. In this work the Hamiltonian
is solved for the spin spirals with azimuthal and polar degrees of freedom --
this spin structure was recently observed in Fe$_{3}$GeTe$_{2}$. We
methodically analyze the Hamiltonian for both integer and half-integer spins in
the honeycomb lattice. It shows emerging topological hall effect emerges
irrespective of the spin. The Chern number, hence the topological phase,
depends on the spin \emph{S}, and interestingly only on the azimuthal angle of
the spin vector. These results will be useful for the design of the topological
electronics devices based on vdW magnets.
Shear flows cause aspherical colloidal particles to tumble so that their
orientations trace out complex trajectories known as Jeffery orbits. The
Jeffery orbit of a prolate ellipsoid is predicted to align the particle's
principal axis preferentially in the plane transverse to the axis of shear.
Holographic microscopy measurements reveal instead that colloidal ellipsoids'
trajectories in Poiseuille flows strongly favor an orientation inclined by
roughly $\pi/8$ relative to this plane. This anomalous observation is
consistent with at least two previous reports of colloidal rods and dimers of
colloidal spheres in Poiseuille flow and therefore appears to be a generic, yet
unexplained feature of colloidal transport at low Reynolds numbers.
We show that a superlattice potential can be employed to engineer topology in
massive Dirac fermions in systems such as bilayer graphene, moir\'e
graphene-boron nitride, and transition-metal dichalcogenide (TMD) monolayers
and bilayers. We use symmetry analysis to analyze band inversions to determine
the Chern number $\mathscr C$ for the valence band as a function of tunable
potential parameters for a class of $C_4$ and $C_3$ symmetric potentials. We
present a novel method to engineer Chern number $\mathscr{C}=2$ for the valence
band and show that the applied potential at minimum must have a scalar together
with a non-scalar periodic part. We discover that certain forms of the
superlattice potential, which may be difficult to realize in naturally
occurring moir\'e patterns, allow for the possibility of non-trivial
topological transitions. These forms may be achievable using an external
superlattice potential that can be created using contemporary experimental
techniques. Our work paves the way to realize the quantum Spin Hall effect
(QSHE), quantum anomalous Hall effect (QAHE), and even exotic non-Abelian
anyons in the fractional quantum Hall effect (FQHE).
Recent years have seen a number of instances where magnetism and
superconductivity intrinsically coexist. Our focus is on the case where
spin-triplet superconductivity arises out of ferromagnetism, and we make a
hydrodynamic analysis of the effect of a charge supercurrent on magnetic
topological defects like domain walls and merons. We find that the emergent
electromagnetic field that arises out of the superconducting order parameter
provides a description for not only the physical quantities such as the local
energy flux density and the interaction between current and defects but also
the energy dissipation through magnetic dynamics of the Gilbert damping, which
becomes more prominent compared to the normal state as superconductivity
attenuates the energy dissipation through the charge sector. In particular, we
reveal that the current-induced dynamics of domain walls and merons in the
presence of the Gilbert damping give rise to the nonsingular $4\pi$ and $2\pi$
phase slips, respectively, revealing the intertwined dynamics of spin and
charge degrees of freedom in ferromagnetic superconductors.
Owing to the chirality of Weyl nodes characterized by the first Chern number,
a Weyl system supports one-way chiral zero modes under a magnetic field, which
underlies the celebrated chiral anomaly. As a generalization of Weyl nodes from
three-dimensional to five-dimensional physical systems, Yang monopoles are
topological singularities carrying nonzero second-order Chern numbers c2 = +1
or -1. Here, we couple a Yang monopole with an external gauge field using an
inhomogeneous Yang monopole metamaterial, and experimentally demonstrate the
existence of a gapless chiral zero mode, where the judiciously designed
metallic helical structures and the corresponding effective antisymmetric
bianisotropic terms provide the means for controlling gauge fields in a
synthetic five-dimensional space. This zeroth mode is found to originate from
the coupling between the second Chern singularity and a generalized 4-form
gauge field - the wedge product of the magnetic field with itself. This
generalization reveals intrinsic connections between physical systems of
different dimensions, while a higher dimensional system exhibits much richer
supersymmetric structures in Landau level degeneracy due to the internal
degrees of freedom. Our study offers the possibility of controlling
electromagnetic waves by leveraging the concept of higher-order and
higher-dimensional topological phenomena.
Recent studies on disorder-induced many-body localization (MBL) in
non-Hermitian quantum systems have attracted great interest. However, the
non-Hermitian disorder-free MBL still needs to be clarified. We consider a
one-dimensional interacting Stark model with nonreciprocal hoppings having
time-reversal symmetry, the properties of which are boundary dependent. Under
periodic boundary conditions (PBC), such a model exhibits three types of phase
transitions: the real-complex transition of eigenenergies, the topological
phase transition, and the non-Hermitian Stark MBL transition. The real-complex
and topological phase transitions occur at the same point in the thermodynamic
limit, but do not coincide with the non-Hermitian Stark MBL transition, which
is quite different from the non-Hermitian disordered cases. By the level
statistics, the system undergoes from the Ginibre ensemble (GE) to Gaussian
orthogonal ensemble (GOE) to Possion ensemble (PE) transitions with the
increase of the linear tilt potential's strength $\gamma$. The real-complex
transition of the eigenvalues is accompanied by the GE-to-GOE transition in the
ergodic regime. Moreover, the second transition of the level statistics
corresponds to the occurrence of non-Hermitian Stark MBL. We demonstrate that
the non-Hermitian Stark MBL is robust and shares many similarities with
disorder-induced MBL, which several existing characteristic quantities of the
spectral statistics and eigenstate properties can confirm. The dynamical
evolutions of the entanglement entropy and the density imbalance can
distinguish the real-complex and Stark MBL transitions. Finally, we find that
our system under open boundary conditions lacks a real-complex transition, and
the transition of non-Hermitian Stark MBL is the same as that under PBCs.
The valley-related multiple topological phase transitions attracted
significant attention due to their providing significant opportunities for
fundamental research and practical applications. However, unfortunately, to
date there is no real material that can realize valley-related multiple
topological phase transitions. Here, through first-principles calculations and
model analysis, we investigate the structural, magnetic, electronic, and
topological properties of VSiXN$_4$ (X = C, Si, Ge, Sn, Pb) monolayers.
VSiXN$_4$ monolayers are stable and intrinsically ferrovalley materials.
Intriguingly, we found that the built-in electric field and strain can induce
valley-related multiple topological phase transitions in the materials from
valley semiconductor to valley-half-semimetal, to valley quantum anomalous Hall
insulator, to valley-half-semimetal, and to valley semiconductor (or to
valley-metal). The nature of topological phase transition is the built-in
electric field and strain induce band inversion between the
d$_{xy}$/d$_{x2-y2}$ and d$_{z2}$ at obritals at K and K' valleys. Our findings
not only reveal the mechanism of multiple topological phase transitions, but
also provides an ideal platform for the multi-field manipulating the spin,
valley, and topological physics. It will open new perspectives for spintronic,
valleytronic, and topological nanoelectronic applications based on these
materials.
Since dissipative processes are ubiquitous in semiconductors, characterizing
how electronic and thermal energy transduce and transport at the nanoscale is
vital for understanding and leveraging their fundamental properties. For
example, in low-dimensional transition metal dichalcogenides (TMDCs), excess
heat generation upon photoexcitation is difficult to avoid since even with
modest injected exciton densities, exciton-exciton annihilation still occurs.
Both heat and photoexcited electronic species imprint transient changes in the
optical response of a semiconductor, yet the unique signatures of each are
difficult to disentangle in typical spectra due to overlapping resonances. In
response, we employ stroboscopic optical scattering microscopy (stroboSCAT) to
simultaneously map both heat and exciton populations in few-layer \ch{MoS2} on
relevant nanometer and picosecond length- and time scales and with 100-mK
temperature sensitivity. We discern excitonic contributions to the signal from
heat by combining observations close to and far from exciton resonances,
characterizing photoinduced dynamics for each. Our approach is general and can
be applied to any electronic material, including thermoelectrics, where heat
and electronic observables spatially interplay, and lays the groundwork for
direct and quantitative discernment of different types of coexisting energy
without recourse to complex models or underlying assumptions.
Exploring the interplay between topological phases and photons opens new
avenues for investigating novel quantum states. Here we show that
superconducting resonators can serve as sensitive probes for properties of
topological insulator nanowires (TINWs) embedded within them. By combining a
static, controllable magnetic flux threading the TINW with an additional
oscillating electromagnetic field applied perpendicularly, we show that orbital
resonances can be generated and are reflected in periodic changes of the
Q-factor of the resonator as a function of the flux. This response probes the
confinement of the two-dimensional Dirac orbitals on the surface of the TINW,
revealing their density of states and specific transition rules, as well as
their dependence on the applied flux. Our approach represents a promising
cross-disciplinary strategy for probing topological solid-state materials using
state-of-the-art photonic cavities, which would avoid the need for attaching
contacts, thereby enabling access to electronic properties closer to the
pristine topological states.
We analyze the origin of the parabolic background of magnetoresistance
oscillations measured in finite-width superconducting mesoscopic rings with
input and output stubs and in patterned films. The transmission model
explaining the sinusoidal oscillation of magnetoresistance is extended to
address the parabolic background as a function of the magnetic field. Apart
from the interference mechanism activated by the ring, pinned superconducting
vortices as topological defects introduce a further interference-based
distribution of supercurrents that affects, in turn, the voltmeter-sensed
quasiparticles. The onset of vortices changes the topology of the
superconducting state in a mesoscopic ring in a such a way that the full
magnetoresistance dynamics can be interpreted owing to the interference of the
constituents of the order parameter induced by both the ring with its
doubly-connected topology and the vortex lattice in it.
We study the coevolutionary dynamics of network topology and social complex
contagion using a threshold cascade model. Our coevolving threshold model
incorporates two mechanisms: the threshold mechanism for the spreading of a
minority state such as a new opinion, idea, or innovation and the network
plasticity implemented as rewiring of links to cut the connections between
nodes in different states. Using numerical simulations and a mean-field
theoretical analysis, we demonstrate that the coevolutionary dynamics can
significantly affect the cascades dynamics. The domain of parameters, i.e.,
threshold and network mean degree, for which global cascades occur shrinks with
increasing network plasticity, indicating that the rewiring process suppresses
the onset of global cascades. We also found that during evolution, non-adopted
nodes form denser connections, resulting in a wider degree distribution and a
non-monotonous dependence of cascades sizes with plasticity.
This paper focuses on investigating high-order harmonic generation (HHG) in
graphene quantum dots (GQDs) under intense near-infrared laser fields. To model
the GQD and its interaction with the laser field, we utilize a mean-field
approach. Our analysis of the HHG power spectrum reveals fine structures and a
noticeable enhancement in cutoff harmonics due to the long-range correlations.
We also demonstrate the essential role of Coulomb interaction in determining of
harmonics intensities and cutoff position. Unlike atomic HHG, where the cutoff
energy is proportional to the pump wave intensity, in GQDs the cutoff energy
scales with the square root of the field strength amplitude. A detailed
time-frequency analysis of the entire range of HHG spectrum is presented using
a wavelet transform. The analysis reveals intricate details of the spectral and
temporal fine structures of HHG, offering insights into the various HHG
mechanisms in GQDs.
We have developed a state-of-the-art apparatus for laser-based spin- and
angle-resolved photoemission spectroscopy with micrometer spatial resolution
(micro-SARPES). This equipment is achieved through the combination of a
high-resolution photoelectron spectrometer, a 6-eV laser with high photon flux
that is focused down to a few micrometers, a high-precision sample stage
control system, and a double very-low-energy-electron-diffraction spin
detector. The setup achieves an energy resolution of 1.5 (5.5) meV without
(with) the spin detection mode, compatible with a spatial resolution better
than 10 micrometers. This enables us to probe both spatially-resolved
electronic structures and vector information of spin polarization in three
dimensions. The performance of micro-SARPES apparatus is demonstrated by
presenting ARPES and SARPES results from topological insulators and Au
photolithography patterns on a Si (001) substrate.
Boundaries of Walker-Wang models have been used to construct commuting
projector models which realize chiral unitary modular tensor categories (UMTCs)
as boundary excitations. Given a UMTC $\mathcal{A}$ representing the Witt class
of an anomaly, the article [arXiv:2208.14018] gave a commuting projector model
associated to an $\mathcal{A}$-enriched unitary fusion category $\mathcal{X}$
on a 2D boundary of the 3D Walker-Wang model associated to $\mathcal{A}$. That
article claimed that the boundary excitations were given by the enriched
center/M\"uger centralizer $Z^\mathcal{A}(\mathcal{X})$ of $\mathcal{A}$ in
$Z(\mathcal{X})$.
In this article, we give a rigorous treatment of this 2D boundary model, and
we verify this assertion using topological quantum field theory (TQFT)
techniques, including skein modules and a certain semisimple algebra whose
representation category describes boundary excitations. We also use TQFT
techniques to show the 3D bulk point excitations of the Walker-Wang bulk are
given by the M\"uger center $Z_2(\mathcal{A})$, and we construct
bulk-to-boundary hopping operators $Z_2(\mathcal{A})\to
Z^{\mathcal{A}}(\mathcal{X})$ reflecting how the UMTC of boundary excitations
$Z^{\mathcal{A}}(\mathcal{X})$ is symmetric-braided enriched in
$Z_2(\mathcal{A})$.
This article also includes a self-contained comprehensive review of the
Levin-Wen string net model from a unitary tensor category viewpoint, as opposed
to the skeletal $6j$ symbol viewpoint.
The harmonically confined Vicsek model displays qualitative and quantitative
features observed in natural insect swarms. It exhibits a scale free transition
between single and multicluster chaotic phases. Finite size scaling indicates
that this unusual phase transition occurs at zero confinement [Physical Review
E 107, 014209 (2023)]. While the evidence of the scale-free-chaos phase
transition comes from numerical simulations, here we present its mean field
theory. Analytically determined critical exponents are those of the Landau
theory of equilibrium phase transitions plus dynamical critical exponent $z=1$
and a new critical exponent $\varphi=0.5$ for the largest Lyapunov exponent.
The phase transition occurs at zero confinement and noise in the mean field
theory. The noise line of zero largest Lyapunov exponents informs observed
behavior: (i) the qualitative shape of the swarm (on average, the center of
mass rotates slowly at the rate marked by the winding number and its trajectory
fills compactly the space, similarly to the observed condensed nucleus
surrounded by vapor), and (ii) the critical exponents resemble those observed
in natural swarms. Our predictions include power laws for the frequency of the
maximal spectral amplitude and the winding number.
Spin currents driven by spin-orbit coupling are key to spin torque devices,
but determining the proper spin current is highly non-trivial. Here we derive a
general quantum-mechanical formula for the intrinsic proper spin current
showing that it is a topological quantity, and can be finite even in the gap.
We determine the spin-Hall current due to the bulk states of topological
insulators both deep in the bulk, where the system is unmagnetized, and near
the interface, where a proximity-induced magnetization is present, as well as
for low-dimensional spin-3/2 hole systems.
We show that a two-body Jastrow wave function is able to capture the
ground-state properties of the $S=1$ antiferromagnetic Heisenberg chain with
the single-ion anisotropy term, in both the topological and trivial phases.
Here, the optimized Jastrow pseudo potential assumes a very simple form in
Fourier space, i.e., $v_{q} \approx 1/q^2$, which is able to give rise to a
finite string-order parameter in the topological regime. The results are
analysed by using an exact mapping from the quantum expectation values over the
variational state to the classical partition function of the one-dimensional
Coulomb gas of particles with charge $q=\pm 1$. Here, two phases are present at
low temperatures: the first one is a diluted gas of dipoles (bound states of
particles with opposite charges), which are randomly oriented (describing the
trivial phase); the other one is a dense liquid of dipoles, which are aligned
thanks to the residual dipole-dipole interactions (describing the topological
phase, with the finite string order being related to the dipole alignment). Our
results provide an insightful interpretation of the ground-state nature of the
spin-1 antiferromagnetic Heisenberg model.
Despite numerous applications of two-dimensional plasmons for electromagnetic
energy manipulation at the nanoscale, their quantitative refraction and
reflection laws (analogs of Fresnel formulas in optics) have not yet been
established. This fact can be traced down to the strong non-locality of
equations governing the 2d plasmon propagation. Here, we tackle this difficulty
by direct solution of plasmon scattering problem with Wiener-Hopf technique. We
obtain the reflection and transmission coefficients for 2d plasmons at the
discontinuity of 2d conductivity at arbitrary incidence angle, for both gated
and non-gated 2d systems. At a certain incidence angle, the absolute
reflectivity has a pronounced dip reaching zero for gated plasmons. The dip is
associated with wave passage causing no dynamic charge accumulation at the
boundary. For all incidence angles, the reflection has a non-trivial phase
different from zero and $\pi$.
The impact of proximity-induced spin-orbit and exchange coupling on the
correlated phase diagram of rhombohedral trilayer graphene (RTG) is
investigated theoretically. By employing \emph{ab initio}-fitted effective
models of RTG encapsulated by transition metal dichalcogenides (spin-orbit
proximity effect) and ferromagnetic Cr$_2$Ge$_2$Te$_6$ (exchange proximity
effect), we incorporate the Coulomb interactions within the random-phase
approximation to explore potential correlated phases at different displacement
field and doping. We find a rich spectrum of spin-valley resolved Stoner and
intervalley coherence instabilities induced by the spin-orbit proximity
effects, such as the emergence of a \textit{spin-valley-coherent} phase due to
the presence of valley-Zeeman coupling. Similarly, proximity exchange removes
the phase degeneracies by biasing the spin direction, enabling a
magneto-correlation effect -- strong sensitivity of the correlated phases to
the relative magnetization orientations (parallel or antiparallel) of the
encapsulating ferromagnetic layers.
The electronic properties of a hybrid system made of single-bilayer graphene
structures subjected to a perpendicular magnetic field are studied for the
zigzag boundaries of the junction, zigzag-1 (ZZ1) and zigzag-2 (ZZ2). These
later examples exhibit different behaviors that have been investigated using
the continuum Dirac model. Our results reveal that the conductance depends on
the width of bilayer graphene for ZZ1 and shows maxima for ZZ2 as a function of
the magnetic field, in contrast to ZZ1. It is found that interfaces have
significant impacts on the transmission probability, with the confinement of
the ZZ1 boundary being more substantial than that of ZZ2
Nanoscale ferroelectric 2D materials offer unique opportunity to investigate
curvature and strain effects on materials functionalities. Among these,
CuInP2S6 (CIPS) has attracted tremendous research interest in recent years due
to combination of room temperature ferroelectricity, scalability to a few
layers thickness, and unique ferrielectric properties due to coexistence of 2
polar sublattices. Here, we explore the local curvature and strain effect on
the polarization in CIPS via piezoresponse force microscopy and spectroscopy.
To explain the observed behaviors and decouple the curvature and strain effects
in 2D CIPS, we introduce finite element Landau-Ginzburg-Devonshire model. The
results show that bending induces ferrielectric domains in CIPS, and the
polarization-voltage hysteresis loops differ in bending and non-bending
regions. Our simulation indicates that the flexoelectric effect can affect
local polarization hysteresis. These studies open a novel pathway for the
fabrication of curvature-engineered nanoelectronic devices.
We theoretically study gate-defined one-dimensional channels in planar Ge
hole gases as a potential platform for non-Abelian Majorana zero modes. We
model the valence band holes in the Ge channel by adding appropriate
confinement potentials to the 3D Luttinger-Kohn Hamiltonian, additionally
taking into account a magnetic field applied parallel to the channel, an
out-of-plane electric field, as well as the effect of compressive strain in the
parent quantum well. Assuming that the Ge channel is proximitized by an
$s$-wave superconductor (such as, e.g., Al) we calculate the topological phase
diagrams for different channel geometries, showing that sufficiently narrow Ge
hole channels can indeed enter a topological superconducting phase with
Majorana zero modes at the channel ends. We estimate the size of the
topological gap and its dependence on various system parameters such as channel
width, strain, and the applied out-of-plane electric field, allowing us to
critically discuss under which conditions Ge hole channels may manifest
Majorana zero modes. Since ultra-clean Ge quantum wells with hole mobilities
exceeding one million and mean-free paths on the order of many microns already
exist, gate-defined Ge hole channels may be able to overcome some of the
problems caused by the presence of substantial disorder in more conventional
Majorana platforms.
We investigate the relation between the localization of generalized Wannier
bases and the topological properties of two-dimensional gapped quantum systems
of independent electrons in a disordered background, including magnetic fields,
as in the case of Chern insulators and quantum Hall systems. We prove that the
existence of a well-localized generalized Wannier basis for the Fermi
projection implies the vanishing of the Chern character, which is proportional
to the Hall conductivity in the linear response regime. Moreover, we state a
localization dichotomy conjecture for general non-periodic gapped quantum
systems.
Polymers in nonuniform flows undergo strong deformation, which in the
presence of persistent stretching can result in the coil-stretch transition.
This phenomenon has been characterized by using the formalism of nonequilibrium
statistical mechanics. In particular, the entropy of the polymer extension
reaches a maximum at the transition. We extend the entropic characterization of
the coil-stretch transition by studying the differential entropy of the polymer
fractional extension in a set of laminar and random velocity fields that are
benchmarks for the study of polymer stretching in flow. In the case of random
velocity fields, a suitable description of the transition is obtained by
considering the entropy of the logarithm of the extension instead of the
entropy of the extension itself. Entropy emerges as an effective tool for
capturing the coil-stretch transition and comparing its features in different
flows.
New developments in superconductivity, particularly through unexpected and
often astonishing forms of superconducting materials, continue to excite the
community and stimulate theory. It is now becoming clear that there are two
distinct platforms for superconductivity through natural and synthetic
materials. Indeed, the latter category has greatly expanded in the last decade
or so, with the discoveries of new forms of superfluidity in artificial
heterostructures and the exploitation of proximitization. The former category
continues to surprise through the Fe-based pnictides and chalcogenides, and
nickelates as well as others. It is the goal of this review to present this
two-pronged investigation into superconductors, with a focus on those which we
have come to understand belong somewhere between the BCS and Bose-Einstein
condensation (BEC) regimes. We characterize in detail the nature of this
``crossover" superconductivity, which is to be distinguished from crossover
superfluidity in Fermi gases. In the process, we address the multiple ways of
promoting a system out of the BCS and into the BCS-BEC crossover regime within
the context of concrete experimental realizations. These involve natural
materials, such as organic conductors, as well as artificial, mostly
two-dimensional materials, such as magic-angle twisted bilayer and trilayer
graphene, or gate-controlled devices, as well as one-layer and interfacial
superconducting films. This work should be viewed as a celebration of BCS
theory by showing that even though this theory was initially implemented with
the special case of weak correlations in mind, it can in a very natural way be
extended to treat the case of these more exotic strongly correlated
superconductors.
Cooperative emission of coherent radiation from multiple emitters (known as
superradiance) has been predicted and observed in various physical systems,
most recently in CsPbBr$_3$ nanocrystal superlattices. Superradiant emission is
coherent and occurs on timescales faster than the emission from isolated
nanocrystals. Theory predicts cooperative emission being faster by a factor of
up to the number of nanocrystals ($N$). However, superradiance is strongly
suppressed due to the presence of energetic disorder, stemming from nanocrystal
size variations and thermal decoherence. Here, we analyze superradiance from
superlattices of different dimensionalities (one-, two- and three-dimensional)
with variable nanocrystal aspect ratios. We predict as much as a 15-fold
enhancement in robustness against realistic values of energetic disorder in
three-dimensional (3D) superlattices composed of cuboid-shaped, as opposed to
cube-shaped, nanocrystals. Superradiance from small $(N\lesssim 10^3)$
two-dimensional (2D) superlattices is up to ten times more robust to static
disorder and up to twice as robust to thermal decoherence than 3D superlattices
with the same $N$. As the number of $N$ increases, a crossover in the
robustness of superradiance occurs from 2D to 3D superlattices. For large $N\
(> 10^3)$, the robustness in 3D superlattices increases with $N$, showing
cooperative robustness to disorder. This opens the possibility of observing
superradiance even at room temperature in large 3D superlattices, if
nanocrystal size fluctuations can be kept small.
We investigate the many-body behavior of polaritons formed from electron-hole
pairs strongly coupled to photons in a two-dimensional semiconductor
microcavity. We use a microscopic mean-field BCS theory that describes
polariton condensation in quasi-equilibrium across the full range of excitation
densities. In the limit of vanishing density, we show that our theory recovers
the exact single-particle properties of polaritons, while at low densities it
captures non-linear polariton-polariton interactions within the Born
approximation. For the case of highly screened contact interactions between
charge carriers, we obtain analytic expressions for the equation of state of
the many-body system. This allows us to show that there is a photon resonance
at a chemical potential higher than the photon cavity energy, where the
electron-hole pair correlations in the polariton condensate become universal
and independent of the details of the carrier interactions. Comparing the
effect of different ranged interactions between charge carriers, we find that
the Rytova-Keldysh potential (relevant to transition metal dichalcogenides)
offers the best prospect of reaching the BCS regime, where pairs strongly
overlap and the minimum pairing gap occurs at finite momentum. Finally, going
beyond thermal equilibrium, we argue that there are generically two polariton
branches in the driven-dissipative system and we discuss the possibility of a
density-driven exceptional point within our model.
Charge transfer between atoms is fundamental to chemical bonding but has
remained very challenging to detect directly in real space. Atomic-resolution
imaging of charge density is not sufficient by itself, as the change in the
density due to bonding is subtle compared to the total local charge density.
Both sufficiently high sensitivity and accuracy are required, which we
demonstrate here for the detection of charge transfer at defects in
two-dimensional WS\textsubscript{2} via high-speed electron ptychography and
its ability to correct errors due to residual lens aberrations.
Magnetic materials with noncollinear spin textures are promising for
spintronic applications. To realize practical devices, control over the length
and energy scales of such spin textures is imperative. The chiral helimagnets
Cr1/3NbS2 and Cr1/3TaS2 exhibit analogous magnetic phase diagrams with
different real-space periodicities and field dependence, positioning them as
model systems for studying the relative strengths of the microscopic mechanisms
giving rise to exotic spin textures. Here, we carry out a comparative study of
the electronic structures of Cr1/3NbS2 and Cr1/3TaS2 using angle-resolved
photoemission spectroscopy and density functional theory. We show that bands in
Cr1/3TaS2 are more dispersive than their counterparts in Cr1/3NbS2 and connect
this result to bonding and orbital overlap in these materials. We also
unambiguously distinguish exchange splitting from surface termination effects
by studying the dependence of their photoemission spectra on polarization,
temperature, and beam size. We find strong evidence that hybridization between
intercalant and host lattice electronic states mediates the magnetic exchange
interactions in these materials, suggesting that band engineering is a route
toward tuning their spin textures. Overall, these results underscore how the
modular nature of intercalated transition metal dichalcogenides translates
variation in composition and electronic structure to complex magnetism.

Date of feed: Wed, 24 May 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]+) **Quantum state complexity meets many-body scars. (arXiv:2305.13322v1 [quant-ph])**

Sourav Nandy, Bhaskar Mukherjee, Arpan Bhattacharyya, Aritra Banerjee

**Bandwidth-tuned Wigner-Mott Transition at $\nu=1/5$: an Infinite Matrix Product State Study. (arXiv:2305.13355v1 [cond-mat.str-el])**

Thomas G. Kiely, Debanjan Chowdhury

**Stoner ferromagnetism in a momentum-confined interacting 2D electron gas. (arXiv:2305.13373v1 [cond-mat.str-el])**

Ohad Antebi, Ady Stern, Erez Berg

**Quasi-Fermi liquid behavior in a one-dimensional system of interacting spinless fermions. (arXiv:2305.13374v1 [cond-mat.str-el])**

Joshua D. Baktay, Alexander V. Rozhkov, Adrian E. Feiguin, Julian Rincon

**Dependence of topological phase on nuclear spin $S$ and spin modulation vector in van der Waals Magnets. (arXiv:2305.13423v1 [cond-mat.mes-hall])**

Kaushal K. Kesharpu

**Anomalous tumbling of colloidal ellipsoids in Poiseuille flows. (arXiv:2305.13435v1 [cond-mat.soft])**

Lauren E. Altman, Andrew D. Hollingsworth, David G. Grier

**Superlattice Engineering of Topology in Massive Dirac Fermions. (arXiv:2305.13522v1 [cond-mat.mes-hall])**

Nishchay Suri, Chong Wang, Benjamin M. Hunt, Di Xiao

**Current-driven motion of magnetic topological defects in ferromagnetic superconductors. (arXiv:2305.13564v1 [cond-mat.supr-con])**

Se Kwon Kim, Suk Bum Chung

**Gauge Field Induced Chiral Zero Mode in Five-dimensional Yang Monopole Metamaterials. (arXiv:2305.13566v1 [cond-mat.mes-hall])**

Shaojie Ma, Hongwei Jia, Yangang Bi, Shangqiang Ning, Fuxin Guan, Hongchao Liu, Chenjie Wang, Shuang Zhang

**From Ergodicity to Many-Body Localization in a One-Dimensional Interacting Non-Hermitian Stark System. (arXiv:2305.13636v1 [cond-mat.dis-nn])**

Jinghu Liu, Zhihao Xu

**Built-in electric field and strain tunable valley-related multiple topological phase transitions in VSiXN$_4$ (X= C, Si, Ge, Sn, Pb) monolayers. (arXiv:2305.13670v1 [cond-mat.mes-hall])**

Ping Li, Xiao Yang, Qing-Song Jiang, Yin-Zhong Wu, Wei Xun

**Detecting, distinguishing, and spatiotemporally tracking photogenerated charge and heat at the nanoscale. (arXiv:2305.13676v1 [cond-mat.mtrl-sci])**

Hannah L. Weaver, Cora M. Went, Joeson Wong, Dipti Jasrasaria, Eran Rabani, Harry A. Atwater, Naomi S. Ginsberg

**Electromagnetic response of the surface states of a topological insulator nanowire embedded within a resonator. (arXiv:2305.13744v1 [cond-mat.mes-hall])**

Shimon Arie Haver, Eran Ginossar, Sebastian E. de Graaf, Eytan Grosfeld

**Quantum Interference by Vortex Supercurrents. (arXiv:2305.13952v1 [cond-mat.supr-con])**

G. P. Papari, V. M. Fomin

**Threshold cascade dynamics on coevolving networks. (arXiv:2305.13965v1 [physics.soc-ph])**

Byungjoon Min, Maxi San Miguel

**Long-range correlation-induced effects at high-order harmonic generation on graphene quantum dots. (arXiv:2305.14034v1 [cond-mat.mes-hall])**

H.K. Avetissian, A.G. Ghazaryan, Kh.V. Sedrakian, G.F. Mkrtchian

**Laser-based angle-resolved photoemission spectroscopy with micrometer spatial resolution and detection of three-dimensional spin vector. (arXiv:2305.14052v1 [cond-mat.mtrl-sci])**

Takuma Iwata, T. Kousa, Y. Nishioka, K. Ohwada, Kenta Kuroda, H. Iwasawa, M. Arita, S. Kumar, A. Kimura, K. Miyamoto, T. Okuda

**Enriched string-net models and their excitations. (arXiv:2305.14068v1 [cond-mat.str-el])**

David Green, Peter Huston, Kyle Kawagoe, David Penneys, Anup Poudel, Sean Sanford

**Mean field theory of chaotic insect swarms. (arXiv:2305.14085v1 [cond-mat.stat-mech])**

R. González-Albaladejo, L. L. Bonilla

**Topological nature of the proper spin current and the spin-Hall torque. (arXiv:2305.14108v1 [cond-mat.mes-hall])**

Hong Liu, James H. Cullen, Dimitrie Culcer

**A Jastrow wave function for the spin-1 Heisenberg chain: the string order revealed by the mapping to the classical Coulomb gas. (arXiv:2305.14162v1 [cond-mat.str-el])**

Davide Piccioni, Christian Apostoli, Federico Becca, Guglielmo Mazzola, Alberto Parola, Sandro Sorella, Giuseppe E. Santoro

**Refraction laws for two-dimensional plasmons. (arXiv:2305.14266v1 [physics.optics])**

Dmitry Svintsov, Georgy Alymov

**Emergent correlated phases in rhombohedral trilayer graphene induced by proximity spin-orbit and exchange coupling. (arXiv:2305.14277v1 [cond-mat.str-el])**

Yaroslav Zhumagulov, Denis Kochan, Jaroslav Fabian

**Transport properties of hybrid single-bilayer graphene interfaces in magnetic field. (arXiv:2305.14284v1 [cond-mat.mes-hall])**

Nadia Benlakhouy, Ahmed Jellal, Michael Schreiber

**Disentangling stress and curvature effects in layered 2D ferroelectric CuInP2S6. (arXiv:2305.14309v1 [cond-mat.mtrl-sci])**

Yongtao Liu, Anna N. Morozovska, Ayana Ghosh, Kyle P. Kelley, Eugene A. Eliseev, Jinyuan Yao, Ying Liu, Sergei V. Kalinin

**Majorana zero modes in gate-defined germanium hole nanowires. (arXiv:2305.14313v1 [cond-mat.mes-hall])**

Katharina Laubscher, Jay D. Sau, Sankar Das Sarma

**Localization of generalized Wannier bases implies Chern triviality in non-periodic insulators. (arXiv:2012.14407v2 [math-ph] UPDATED)**

Giovanna Marcelli, Massimo Moscolari, Gianluca Panati

**Polymer stretching in laminar and random flows: entropic characterization. (arXiv:2112.01344v2 [cond-mat.soft] UPDATED)**

Stefano Musacchio, Victor Steinberg, Dario Vincenzi

**When Superconductivity Crosses Over: From BCS to BEC. (arXiv:2208.01774v3 [cond-mat.supr-con] UPDATED)**

Qijin Chen, Zhiqiang Wang, Rufus Boyack, Shuolong Yang, K. Levin

**Enhanced robustness and dimensional crossover of superradiance in cuboidal nanocrystal superlattices. (arXiv:2209.10943v2 [cond-mat.mes-hall] UPDATED)**

Sushrut Ghonge, David Engel, Francesco Mattiotti, G. Luca Celardo, Masaru Kuno, Boldizsár Jankó

**Quasi-equilibrium polariton condensates in the non-linear regime and beyond. (arXiv:2211.03321v2 [cond-mat.mes-hall] UPDATED)**

Ned Goodman, Brendan C. Mulkerin, Jesper Levinsen, Meera M. Parish

**Detecting charge transfer at defects in 2D materials with electron ptychography. (arXiv:2301.04469v3 [cond-mat.mtrl-sci] UPDATED)**

Christoph Hofer, Jacob Madsen, Toma Susi, Timothy J. Pennycook

**Comparative Electronic Structures of the Chiral Helimagnets Cr1/3NbS2 and Cr1/3TaS2. (arXiv:2305.08829v2 [cond-mat.mtrl-sci] UPDATED)**

Lilia S. Xie, Oscar Gonzalez, Kejun Li, Matteo Michiardi, Sergey Gorovikov, Sae Hee Ryu, Shannon S. Fender, Marta Zonno, Na Hyun Jo, Sergey Zhdanovich, Chris Jozwiak, Aaron Bostwick, Samra Husremovic, Matthew P. Erodici, Cameron Mollazadeh, Andrea Damascelli, Eli Rotenberg, Yuan Ping, D. Kwabena Bediako

Found 9 papers in prb Spin-orbitronic devices can integrate memory and logic by exploiting spin-charge interconversion (SCI), which is optimized by design and materials selection. In these devices, interfaces are crucial elements as they can prohibit or promote spin flow in a device as well as possess spin-orbit coupling… The authors investigate the proximity-induced spin-orbit coupling in twisted graphene/topological insulator (Bi${}_{2}$Se${}_{3}$ and Bi${}_{2}$Te${}_{3}$) heterostructures from first principles. Fitting the band structures around the graphene Dirac cone to an established spin-orbit Hamiltonian yields the twist angle dependencies of the spin-orbit couplings. Amongst other findings, an interesting form of the Rashba spin-orbit coupling arises for such structures. It entails a large radial component of the in-plane spin structure around the Dirac cone, which can be used to realize collinear charge-to-spin conversion. We report neutron scattering measurements on ${\mathrm{YbMnSb}}_{2}$ which shed light on the nature of the magnetic moments and their interaction with Dirac fermions. Using half-polarized neutron diffraction we measured the field-induced magnetization distribution in the paramagnetic phase and found… While the phonon hydrodynamic regime has recently been highlighted experimentally in graphite films, the understanding and modeling of heat transport along their basal plane remain elusive. From first-principles-based modeling, we predict a significant influence of the surface roughness on basal-pla… Surface alloys between the heavy metals Bi, Pb, or Sb and noble metals, such as Ag(111), are known for their giant Rashba splitting. Although thallium (Tl) should result in isostructural surface alloys, its structural and electronic properties remained elusive. The authors present here a detailed work on the structural and electronic properties of Tl films epitaxially grown on Ag(111) surfaces. By combining experimental LEED, AES, STM/STS, and IPE with $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ band structure and charge distribution calculations, the $s$,${p}_{z}$-derived surface state of the TlAg${}_{2}$ surface alloy is identified, with a weak, but finite, Rashba splitting. We study a single two-dimensional Dirac fermion at finite density, subject to a quenched random magnetic field. At low energies and sufficiently weak disorder, the theory maps onto an infinite collection of 1D chiral fermions (associated to each point on the Fermi surface) coupled by a random vector… The quantum hydrodynamic model (QHDM) has become a versatile and efficient tool for plasmonics at nanometer and even subnanometer length scales, but the theory is principally applicable only to simple metals. For the most common plasmonic materials, i.e., noble metals, QHDM has not been duly justifi… Ultrafast mid-infrared excitation of an electron-hole plasma breaks the crystal symmetry of bismuth transiently and opens alternative quantum pathways for the excitation of coherent lattice motions. Probing the transient crystal structure directly by femtosecond x-ray diffraction reveals oscillations of diffracted intensity at a frequency of 2.6 THz, which persist on a picosecond time scale. They reflect coherent wave packet motions along back-folded phonon coordinates in the crystal of reduced symmetry. Optically induced symmetry breaking thus allows for modifying phonon excitations. We show that tilted Weyl semimetals with a spatially varying tilt of the Weyl cones provide a platform for studying analogs to problems in anisotropic optics as well as curved spacetime. Considering particular tilting profiles, we numerically evaluate the time evolution of electronic wave packets an…

Date of feed: Wed, 24 May 2023 03:17:13 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]+) **Emergence of large spin-charge interconversion at an oxidized Cu/W interface**

Inge Groen, Van Tuong Pham, Stefan Ilić, Andrey Chuvilin, Won Young Choi, Edurne Sagasta, Diogo C. Vaz, Isabel C. Arango, Nerea Ontoso, F. Sebastian Bergeret, Luis E. Hueso, Ilya V. Tokatly, and Fèlix Casanova

Author(s): Inge Groen, Van Tuong Pham, Stefan Ilić, Andrey Chuvilin, Won Young Choi, Edurne Sagasta, Diogo C. Vaz, Isabel C. Arango, Nerea Ontoso, F. Sebastian Bergeret, Luis E. Hueso, Ilya V. Tokatly, and Fèlix Casanova

[Phys. Rev. B 107, 184438] Published Tue May 23, 2023

**Twist-angle dependent proximity induced spin-orbit coupling in graphene/topological insulator heterostructures**

Thomas Naimer and Jaroslav Fabian

Author(s): Thomas Naimer and Jaroslav Fabian

[Phys. Rev. B 107, 195144] Published Tue May 23, 2023

**Magnetic excitations in the topological semimetal ${\mathrm{YbMnSb}}_{2}$**

Siobhan M. Tobin, Jian-Rui Soh, Hao Su, Andrea Piovano, Anne Stunault, J. Alberto Rodríguez-Velamazán, Yanfeng Guo, and Andrew T. Boothroyd

Author(s): Siobhan M. Tobin, Jian-Rui Soh, Hao Su, Andrea Piovano, Anne Stunault, J. Alberto Rodríguez-Velamazán, Yanfeng Guo, and Andrew T. Boothroyd

[Phys. Rev. B 107, 195146] Published Tue May 23, 2023

**Basal-plane heat transport in graphite thin films**

Yangyu Guo, Xiao-Ping Luo, Zhongwei Zhang, Samy Merabia, Masahiro Nomura, and Sebastian Volz

Author(s): Yangyu Guo, Xiao-Ping Luo, Zhongwei Zhang, Samy Merabia, Masahiro Nomura, and Sebastian Volz

[Phys. Rev. B 107, 195430] Published Tue May 23, 2023

**Structural and electronic properties of Tl films on Ag(111): From $(\sqrt{3}×\sqrt{3})$ surface alloy to moiré superstructure**

Patrick Härtl, Sven Schemmelmann, Peter Krüger, Markus Donath, and Matthias Bode

Author(s): Patrick Härtl, Sven Schemmelmann, Peter Krüger, Markus Donath, and Matthias Bode

[Phys. Rev. B 107, 205144] Published Tue May 23, 2023

**Random magnetic field and the Dirac Fermi surface**

Chao-Jung Lee and Michael Mulligan

Author(s): Chao-Jung Lee and Michael Mulligan

[Phys. Rev. B 107, 205145] Published Tue May 23, 2023

**Quantum hydrodynamic model for noble metal nanoplasmonics**

Qiang Zhou, Wancong Li, Zi He, Pu Zhang, and Xue-Wen Chen

Author(s): Qiang Zhou, Wancong Li, Zi He, Pu Zhang, and Xue-Wen Chen

[Phys. Rev. B 107, 205413] Published Tue May 23, 2023

**Quantum pathways of carrier and coherent phonon excitation in bismuth**

Azize Koç, Isabel Gonzalez-Vallejo, Matthias Runge, Ahmed Ghalgaoui, Klaus Reimann, Laurenz Kremeyer, Fabian Thiemann, Michael Horn-von Hoegen, Klaus Sokolowski-Tinten, Michael Woerner, and Thomas Elsaesser

Author(s): Azize Koç, Isabel Gonzalez-Vallejo, Matthias Runge, Ahmed Ghalgaoui, Klaus Reimann, Laurenz Kremeyer, Fabian Thiemann, Michael Horn-von Hoegen, Klaus Sokolowski-Tinten, Michael Woerner, and Thomas Elsaesser

[Phys. Rev. B 107, L180303] Published Tue May 23, 2023

**Anisotropic optics and gravitational lensing of tilted Weyl fermions**

Viktor Könye, Lotte Mertens, Corentin Morice, Dmitry Chernyavsky, Ali G. Moghaddam, Jasper van Wezel, and Jeroen van den Brink

Author(s): Viktor Könye, Lotte Mertens, Corentin Morice, Dmitry Chernyavsky, Ali G. Moghaddam, Jasper van Wezel, and Jeroen van den Brink

[Phys. Rev. B 107, L201406] Published Tue May 23, 2023

Found 1 papers in prl Previous computer simulations have suggested that existing models of action potential wave propagation in the heart are not consistent with observed wave propagation behavior. Specifically, computer models cannot simultaneously reproduce the rapid wave speeds and small spatial scales of discordant a…

Date of feed: Wed, 24 May 2023 03:17:13 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]+) **Ephaptic Coupling as a Resolution to the Paradox of Action Potential Wave Speed and Discordant Alternans Spatial Scales in the Heart**

Niels F. Otani, Eileen Figueroa, James Garrison, Michelle Hewson, Laura Muñoz, Flavio H. Fenton, Alain Karma, and Seth H. Weinberg

Author(s): Niels F. Otani, Eileen Figueroa, James Garrison, Michelle Hewson, Laura Muñoz, Flavio H. Fenton, Alain Karma, and Seth H. Weinberg

[Phys. Rev. Lett. 130, 218401] Published Tue May 23, 2023

Found 1 papers in prx A multilevel qubit, or “qudit,” in a superconducting transmon shows high fidelity with several rudimentary algorithms, demonstrating the potential of a quantum computing architecture based on up to four levels rather than just two.

Date of feed: Wed, 24 May 2023 03:17:12 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]+) **Performing $\mathrm{SU}(d)$ Operations and Rudimentary Algorithms in a Superconducting Transmon Qudit for $d=3$ and $d=4$**

Pei Liu, Ruixia Wang, Jing-Ning Zhang, Yingshan Zhang, Xiaoxia Cai, Huikai Xu, Zhiyuan Li, Jiaxiu Han, Xuegang Li, Guangming Xue, Weiyang Liu, Li You, Yirong Jin, and Haifeng Yu

Author(s): Pei Liu, Ruixia Wang, Jing-Ning Zhang, Yingshan Zhang, Xiaoxia Cai, Huikai Xu, Zhiyuan Li, Jiaxiu Han, Xuegang Li, Guangming Xue, Weiyang Liu, Li You, Yirong Jin, and Haifeng Yu

[Phys. Rev. X 13, 021028] Published Tue May 23, 2023

Found 1 papers in pr_res The origin of nonreciprocal phonon dichroism, that is, the Fermi pocket anisotropy, in magnetic two-dimensional Dirac materials is revealed. Two possible ways to obtain the phonon nonreciprocity are proposed.

Date of feed: Wed, 24 May 2023 03:17:11 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]+) **Nonreciprocal phonon dichroism induced by Fermi pocket anisotropy in two-dimensional Dirac materials**

Wen-Yu Shan

Author(s): Wen-Yu Shan

[Phys. Rev. Research 5, L022038] Published Tue May 23, 2023

Found 1 papers in nano-lett

Date of feed: Tue, 23 May 2023 20:41:15 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+) **[ASAP] Abnormal Out-of-Plane Vibrational Raman Mode in Electrochemically Intercalated Multilayer MoS _{2}**

Yufei Sun, Shujia Yin, Ruixuan Peng, Jia Liang, Xin Cong, Yi Li, Chenyu Li, Bolun Wang, Miao-Ling Lin, Ping-Heng Tan, Chunlei Wan, and Kai Liu

Nano Letters

DOI: 10.1021/acs.nanolett.3c01543

Found 1 papers in acs-nano

Date of feed: Wed, 24 May 2023 01:11:06 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]+) **[ASAP] Identification of Ubiquitously Present Polymeric Adlayers on 2D Transition Metal Dichalcogenides**

Rita Tilmann, Cian Bartlam, Oliver Hartwig, Bartlomiej Tywoniuk, Nikolas Dominik, Conor P. Cullen, Lisanne Peters, Tanja Stimpel-Lindner, Niall McEvoy, and Georg S. DuesbergACS NanoDOI: 10.1021/acsnano.3c01649

Found 1 papers in sci-rep Scientific Reports, Published online: 23 May 2023; doi:10.1038/s41598-023-35509-6**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]+) *LC* resonators

Found 2 papers in comm-phys Communications Physics, Published online: 23 May 2023; doi:10.1038/s42005-023-01231-y Communications Physics, Published online: 23 May 2023; doi:10.1038/s42005-023-01236-7**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 spin and conductance in porphyrin-graphene nanoribbon hybrids**

Mads Brandbyge

**Geometrical control of topological charge transfer in Shakti-Cairo colloidal ice**

Pietro Tierno