Found 34 papers in cond-mat We present a unifying framework that allows us to study the mixed
crystalline-electromagnetic responses of topological semimetals in spatial
dimensions up to $D = 3$ through dimensional augmentation and reduction
procedures. We show how this framework illuminates relations between the
previously known topological semimetals, and use it to identify a new class of
quadrupolar nodal line semimetals for which we construct a lattice
tight-binding Hamiltonian. We further utilize this framework to quantify a
variety of mixed crystalline-electromagnetic responses, including several that
have not previously been explored in existing literature, and show that the
corresponding coefficients are universally proportional to weighted
momentum-energy multipole moments of the nodal points (or lines) of the
semimetal. We introduce lattice gauge fields that couple to the crystal
momentum and describe how tools including the gradient expansion procedure,
dimensional reduction, compactification, and the Kubo formula can be used to
systematically derive these responses and their coefficients. We further
substantiate these findings through analytical physical arguments, microscopic
calculations, and explicit numerical simulations employing tight-binding
models.
We study the low-energy eigenstates of a topological superconductor wire
modeled by a Kitaev chain coupled at one of its ends to a quantum dot by
nearest-neighbor (NN) hopping and NN Coulomb repulsion. Using an unrestricted
Hartree-Fock approximation to decouple the Coulomb term, we obtain that the
quality of the Majorana end states is seriously affected by this term only when
the dependence of the low-lying energies with the energy of the quantum dot
shows a "diamond" shape, characteristic of short wires.
Superconducting proximity junctions based on topological insulators are
widely believed to harbor Majorana-like bound states. The latter serves as a
paradigm non-local topological quantum computation protocols. Nowadays, a
search for topological phases in different materials, perspective for a
realization of topological qubits, is one of the central efforts in quantum
physics. It is motivated, in particular, by recent observation of anomalous ac
Josephson effect, which being a signature of Majorana physics. Its
manifestations, such as a fractional Josephson frequency and the absence of the
first (or several odd in more rare cases), Shapiro steps, were reported for
different materials. Here we study Shapiro steps in Nb/Bi2Te2.3Se0.7/Nb
junctions, based on ultrasmall single crystals of a 3D topological insulator
synthesized by a physical vapor deposition (PVD) technique. We present evidence
that our junctions are ballistic. When subjected to microwave radiation, the
junctions exhibit Shapiro steps, but the first step is missing. Typically it is
assumed that the missing first step (MFS) effect cannot be observed in the
presence of quasiparticle poisoning due to suppression of the 4{\pi}-periodic
component. Our findings within the context of the RSJ-model of Josephson
junction dynamics show that such behaviour of samples corresponds to a specific
condition, requiring a minimum of 5% of the 4{\pi}-component for disappearance
of the first Shapiro step.
We have performed hardness measurement experiments under different loads and
loading times by performing micro-indentation marks in the present work.
Chalcogenide glasses (ChGs) comprising Se$_{78}$Te$_{20}$Sn$_2$ and
Se$_{78-x}$Te$_{20}$Sn$_2$Zn$_x$ (where $x = 0, 2, 4, 6$) alloys are the
subject of micro-indentation tests in this work. We have utilized both
micro-indentation and optical microscopic methods to determine Vickers
hardness. Thermal glass transition phenomena have been identified through DSC
techniques. The modulus of elasticity (E), an essential mechanical property,
has been evaluated using established empirical equations. Further, we have
studied other mechanical parameters [e.g., minimal micro-void formation energy
(Eh), glass's fragility index (m), micro-void volume (Vh), etc.] and the
covalent character of the glassy system. Additionally, various physical
parameters, including density, molar volume, and compactness, have also been
determined.
Strain engineering can modulate the material properties of two-dimensional
(2D) semiconductors for electronic and optoelectronic applications. Recent
theory and experiments have found that uniaxial tensile strain can improve the
electron mobility of monolayer MoS$_2$, a 2D semiconductor, but the effects of
biaxial strain on charge transport are not well-understood in 2D
semiconductors. Here, we use biaxial tensile strain on flexible substrates to
probe the electron mobility in monolayer WS$_2$ and MoS$_2$ transistors. This
approach experimentally achieves ~2x higher on-state current and mobility with
~0.3% applied biaxial strain in WS$_2$, the highest mobility improvement at the
lowest strain reported to date. We also examine the mechanisms behind this
improvement through density functional theory simulations, concluding that the
enhancement is primarily due to reduced intervalley electron-phonon scattering.
These results underscore the role of strain engineering 2D semiconductors for
flexible electronics, sensors, integrated circuits, and other opto-electronic
applications.
Stacking monolayer semiconductors results in moir\'e patterns that host many
correlated and topological electronic phenomena, but measurements of the basic
electronic structure underpinning these phenomena are scarce. Here, we
investigate the properties of the conduction band in moir\'e heterobilayers
using submicron angle-resolved photoemission spectroscopy with electrostatic
gating, focusing on the example of WS2/WSe2. We find that at all twist angles
the conduction band edge is the K-point valley of the WS2, with a band gap of
1.58 +- 0.03 eV. By resolving the conduction band dispersion, we observe an
unexpectedly small effective mass of 0.15 +- 0.02 m_e. In addition, we observe
replicas of the conduction band displaced by reciprocal lattice vectors of the
moir\'e superlattice. We present arguments and evidence that the replicas are
due to modification of the conduction band states by the moir\'e potential
rather than to final-state diffraction. Interestingly, the replicas display an
intensity pattern with reduced, 3-fold symmetry, which we show implicates the
pseudo vector potential associated with in-plane strain in moir\'e band
formation.
We review the topological gauge theory of Josephson junction arrays and thin
film superconductors, stressing the role of the usually forgotten quantum phase
slips, and we derive their quantum phase structure. A quantum phase transition
from a superconducting to the dual, superinsulating phase with infinite
resistance (even at finite temperatures) is either direct or goes through an
intermediate bosonic topological insulator phase, which is typically also
called Bose metal. We show how, contrary to a widely held opinion, disorder is
not relevant for the electric response in these quantum phases because
excitations in the spectrum are either symmetry-protected or neutral due to
confinement. The quantum phase transitions are driven only by the electric
interaction growing ever stronger. First, this prevents Bose condensation, upon
which out-of-condensate charges and vortices form a topological quantum state
owing to mutual statistics interactions. Then, at even stronger couplings, an
electric flux tube dual to Abrikosov vortices induces a linearly confining
potential between charges, giving rise to superinsulation.
The combination of a superconductor (SC) and a topological insulator (TI)
nanowire was proposed as a potential candidate for realizing Majorana zero
modes (MZMs). In this study, we adopt the Schr\"odinger-Poisson formalism to
incorporate the electrostatic environment inside the nanowire and
systematically explore its topological properties. Our calculations reveal that
the proximity to the SC induces a band bending effect, leading to a non-uniform
potential across the TI nanowire. As a consequence, there is an upward shift of
the Fermi level within the conduction band. This gives rise to the coexistence
of surface and bulk states, localized in an accumulation layer adjacent to the
TI-SC interface. When magnetic flux is applied, these occupied states have
different flux-penetration areas, suppressing the superconducting gap. However,
this impact can be mitigated by increasing the radius of the nanowire. Finally,
We demonstrate that MZMs can be achieved across a wide range of parameters
centered around one applied flux quantum, $\phi_0 = h/2e$. Within this regime,
MZMs can be realized even in the presence of conduction bands, which are not
affected by the band bending effect. These findings provide valuable insights
into the practical realization of MZMs in TI nanowire-based devices, especially
in the presence of a complicated electrostatic environment.
Magnetic damping has a significant impact on the performance of various
magnetic and spintronic devices, making it a long-standing focus of research.
The strength of magnetic damping is usually quantified by the Gilbert damping
constant in the Landau-Lifshitz-Gilbert equation. Here we propose a
first-principles based approach to evaluate the Gilbert damping constant
contributed by spin-lattice coupling in magnetic insulators. The approach
involves effective Hamiltonian models and spin-lattice dynamics simulations. As
a case study, we applied our method to Y$_3$Fe$_5$O$_{12}$, MnFe$_2$O$_4$ and
Cr$_2$O$_3$. Their damping constants were calculated to be $0.8\times10^{-4}$,
$0.2\times10^{-4}$, $2.2\times 10^{-4}$, respectively at a low temperature. The
results for Y$_3$Fe$_5$O$_{12}$ and Cr$_2$O$_3$ are in good agreement with
experimental measurements, while the discrepancy in MnFe$_2$O$_4$ can be
attributed to the inhomogeneity and small band gap in real samples. The
stronger damping observed in Cr$_2$O$_3$, compared to Y$_3$Fe$_5$O$_{12}$,
essentially results from its stronger spin-lattice coupling. In addition, we
confirmed a proportional relationship between damping constants and the
temperature difference of subsystems, which had been reported in previous
studies. These successful applications suggest that our approach serves as a
promising candidate for estimating the Gilbert damping constant in magnetic
insulators.
Spin-current density functional theory (SCDFT) is a formally exact framework
designed to handle the treatment of interacting many-electron systems including
spin-orbit coupling at the level of the Pauli equation. In practice, robust and
accurate calculations of the electronic structure of these systems call for
functional approximations that depend not only on the densities, but also on
spin-orbitals. Here we show that the call can be answered by resorting to an
extension of the Kohn-Sham formalism, which admits the use of non-local
effective potentials, yet it is firmly rooted in SCDFT. The power of the
extended formalism is demonstrated by calculating the spin-orbit-induced
band-splittings of inversion-asymmetric MoSe$_2$ monolayer and
inversion-symmetric bulk $\alpha$-MoTe$_2$. We show that quantitative agreement
with experimental data is obtainable via global hybrid approximations by
setting the fraction of Fock exchange at the same level which yields accurate
values of the band gap. Key to these results is the ability of the method to
self-consistently account for the spin currents induced by the spin-orbit
interaction. The widely used method of refining spin-density functional theory
by a second-variational treatment of spin-orbit coupling is unable to match our
SCDFT results.
The recent synthesis of MoSi2N4 material, along with theoretical predictions
encompassing the entire family of chemical analogs, has opened up a new array
of low-dimensional materials for a diverse range of optoelectronics and
photovoltaics applications. In this study, we conducted state-of-the-art
many-body first-principles calculations to analyze the quasi-particle
electronic structure of the material class MSi2Z4 (where M = Mo, W, and Z = N,
P, As, Sb). All monolayers display a direct band gap at the K point, with the
exception of MoSi2N4. In tungsten-based compounds, the fundamental-gap can be
adjusted over a significantly broader energy range compared to their
molybdenum-based counterparts. Additionally, increasing atomic weight of the Z,
both the band gap and exciton binding energies decrease. A noteworthy feature
is the absence of a lateral valley ({\Lambda} or Q) near the conduction band
minimum, indicating potential higher photoluminescence efficiencies compared to
conventional transition-metal dichalcogenide monolayers. The optical spectra of
these materials are predominantly characterized by tightly bound excitons,
leading to an absorption onset in the visible range (for N-based) and in the
infrared region (for others). This diversity offers promising opportunities to
incorporate these materials and their heterostructures into optoelectronic
devices, with tandem solar cells being particularly promising.
We consider thermoosmosis of a near-critical binary fluid mixture, lying in
the one-phase region, through a capillary tube in the presence of preferential
adsorption of one component. The critical composition is assumed in the two
reservoirs linked by the tube. With coarse-grained approach, we evaluate the
flow field induced by the thermal force density. We predict a universal
property; if the mixture is near the upper (lower) consolute point, the flow
direction is the same as (opposite to) the direction of the temperature
gradient, irrespective of which component is adsorbed onto the wall.
We consider a binary fluid mixture, which lies in the one-phase region near
the demixing critical point, and study its transport through a capillary tube
linking two large reservoirs. We assume that short-range interactions cause
preferential adsorption of one component on the tube's wall. The adsorption
layer can become much thicker than the molecular size, which enables us to
apply hydrodynamics based on a coarse-grained free-energy functional. For
linear transport phenomena induced by gradients of the pressure, composition,
and temperature along a cylindrical tube, we obtain the formulas of the Onsager
coefficients to extend our previous results on isothermal transport, assuming
the critical composition in the middle of each reservoir in the reference
equilibrium state. Among the linear transport phenomena, we focus on
thermoosmosis -- mass flow due to a temperature gradient. We explicitly derive
a formula for the thermal force density, which is nonvanishing in the
adsorption layer and causes thermoosmosis. This formula for a near-critical
binary fluid mixture is an extension of the conventional formula for a
one-component fluid, expressed in terms of local excess enthalpy. We predict
that the direction of thermoosmotic flow of a mixture near the upper (lower)
consolute point is the same as (opposite to) that of the temperature gradient,
irrespective of which component is adsorbed on the wall. Our procedure would
also be applied to dynamics of a soft material, whose mesoscopic inhomogeneity
can be described by a coarse-grained free-energy functional.
We study the influence of the antiferromagnetic order on the surface states
of topological insulators. We derive an effective Hamiltonian for these states,
taking into account the space structure of the antiferromagnetic ordering. We
obtain a typical (gapless) Dirac Hamiltonian for the surface states if the
surface of the sample is not perturbed. However, a shift in the chemical
potential of the surface layer opens a gap in the spectrum away from Fermi
energy. Such a gap arises only in systems with a finite antiferromagnetic
order. We observe that the gap is robust against the surface disorder. The
obtained results are consistent with the recent experiments and density
functional theory calculations.
Progress in layered van der Waals materials has resulted in the discovery of
ferromagnetic and ferroelectric materials down to the monolayer limit.
Recently, evidence of the first purely two-dimensional multiferroic material
was reported in monolayer NiI$_2$. However, probing multiferroicity with
scattering-based and optical bulk techniques is challenging on 2D materials,
and experiments on the atomic scale are needed to fully characterize the
multiferroic order at the monolayer limit. Here, we use scanning tunneling
microscopy (STM) supported by theoretical calculations based on density
functional theory (DFT) to probe and characterize the multiferroic order in
monolayer NiI$_2$. We demonstrate that the type-II multiferroic order displayed
by NiI$_2$, arising from the combination of a magnetic spin spiral order and a
strong spin-orbit coupling, allows probing the multiferroic order in the STM
experiments. Moreover, we directly probe the magnetoelectric coupling of
NiI$_2$ by external electric field manipulation of the multiferroic domains.
Our findings establish a novel point of view to analyse magnetoelectric effects
at the microscopic level, paving the way towards engineering new multiferroic
orders in van der Waals materials and their heterostructures.
Graphene is a promising material for applications as a channel in graphene
field-effect transistors (GFETs) which may be used as a building block for
optoelectronics, high-frequency devices and sensors. However, these devices
require gate insulators which ideally should form atomically flat interfaces
with graphene and at the same time contain small densities of traps to maintain
high device stability. Previously used amorphous oxides, such as SiO2 and
Al2O3, however, typically suffer from oxide dangling bonds at the interface,
high surface roughness and numerous border oxide traps. In order to address
these challenges, here we use for the first time 2nm thick epitaxial CaF2 as a
gate insulator in GFETs. By analyzing device-to-device variability for over 200
devices fabricated in two batches, we find that tens of them show similar gate
transfer characteristics. Our statistical analysis of the hysteresis up to 175C
has revealed that while an ambient-sensitive counterclockwise hysteresis can be
present in some devices, the dominant mechanism is thermally activated charge
trapping by border defects in CaF2 which results in the conventional clockwise
hysteresis. We demonstrate that both the hysteresis and bias-temperature
instabilities in our GFETs with CaF2 are comparable to similar devices with
SiO2 and Al2O3. In particular, we achieve a small hysteresis below 0.01 V for
equivalent oxide thickness (EOT) of about 1 nm at the electric fields up to 15
MV/cm and sweep times in the kilosecond range. Thus, our results demonstrate
that crystalline CaF2 is a promising insulator for highly-stable GFETs.
Topological materials confined in one-dimension (1D) can transform computing
technologies, such as 1D topological semimetals for nanoscale interconnects and
1D topological superconductors for fault-tolerant quantum computing. As such,
understanding crystallization of 1D-confined topological materials is critical.
Here, we demonstrate 1D-confined crystallization routes during
template-assisted nanowire synthesis where we observe diameter-dependent phase
selectivity for topological metal tungsten phosphides. A phase bifurcation
occurs to produce tungsten monophosphide and tungsten diphosphide at the
cross-over nanowire diameter of ~ 35 nm. Four-dimensional scanning transmission
electron microscopy was used to identify the two phases and to map
crystallographic orientations of grains at a few nm resolution. The 1D-confined
phase selectivity is attributed to the minimization of the total surface
energy, which depends on the nanowire diameter and chemical potentials of
precursors. Theoretical calculations were carried out to construct the
diameter-dependent phase diagram, which agrees with experimental observations.
Our find-ings suggest a new crystallization route to stabilize topological
materials confined in 1D.
It has proven difficult to distinguish between topological Majorana bound
states and nontopological Andreev bound states and to measure the unique
properties of the former. In this work, we aim to alleviate this problem by
proposing and theoretically analyzing a new type of fusion protocol based on
transport measurements in a Majorana box coupled to normal leads. The protocol
is based on switching between different nanowire pairs being tunnel coupled to
one of the leads. For a Majorana system, this leads to switching between
different states associated with parity blockade. The charge being transmitted
at each switch provides a measurement of the Majorana fusion rules.
Importantly, the result is different for a system with nontopological Andreev
bound states. The proposed protocol only requires measuring a DC current
combined with fast gate-control of the tunnel couplings.
We investigate the elastic energy stored in a filament pair as a function of
applied twist by measuring torque under prescribed end-to-end separation
conditions. We show that the torque increases rapidly to a peak with applied
twist when the filaments are initially separate, then decreases to a minimum as
the filaments cross and come into contact. The torque then increases again
while the filaments form a double helix with increasing twist. A nonlinear
elasto-geometric model that combines the effect of geometrical nonlinearities
with large stretching and self-twist is shown to capture the evolution of the
helical geometry, the torque profile, and the stored energy with twist. We find
that a large fraction of the total energy is stored in stretching the
filaments, which increases with separation distance and applied tension. We
find that only a small fraction of energy is stored in the form of bending
energy, and that the contribution due to contact energy is negligible. Our
study highlights the consequences of stretchablility on filament twisting which
is a fundamental topological transformation relevant to making ropes, tying
shoelaces, actuating robots, and the physical properties of entangled polymers.
The orientational dynamics of supercooled glycerol using molecular dynamics
simulations for temperatures ranging from 323 K to 253 K, is probed through
correlation functions of first and second ranks of Legendre polynomials,
pertaining respectively to dielectric spectroscopy (DS) and depolarized dynamic
light scattering (DDLS). The self, cross, and total correlation functions are
compared with relevant experimental data. The computations reveal the low
sensitivity of DDLS to cross-correlations, in agreement with what is found in
experimental work, and strengthen the idea of directly comparing DS and DDLS
data to evaluate the effect of cross-correlations in polar liquids. The
analysis of the net static cross-correlations and their spatial decomposition
shows that, although cross-correlations extend over nanometric distances, their
net magnitude originates, in the case of glycerol, from the first shell of
neighbouring molecules. Accessing the angular dependence of the static
correlation allows us to get a microscopic understanding of why the rank-1
correlation function is more sensitive to cross-correlation than its rank-2
counterpart.
Over the past years, one witnesses a growing interest in flat band (FB)
physics which has become a playground for exotic phenomena. In this study, we
address the FB superconductivity in onedimensional stub chain. In contrast to
the sawtooth chain or the creutz ladder, for a given strength of the attractive
electron-electron interaction, the stub chain allows the tuning of the real
space spreading of the FB eigenstates (quantum metric or QM). We study in
detail the interplay between the interaction strength and the mean value of the
QM \langle g \rangle on the pairings and on the superfluid weight D_s. Our
calculations reveal several interesting and intriguing features. For instance,
in the weak coupling regime, D_s with respect to \langle g \rangle exhibits two
different types of behaviour. Despite the fact that the pairings differs
drastically, D_s scales linearly with the QM only when its \langle g \rangle is
large enough (small gap limit). On the other hand, when the QM is of small
amplitude an unusual power law is found, more precisely D_s \propto \langle g
\rangle^\nu where \nu \longrightarrow 2 in the limit of large single particle
gap. In addition to the numerical calculations, we have provided several
analytical results which shed light on the physics in both the weak and strong
coupling regime. Finally, we have addressed the impact of the thermal
fluctuations on the superfluid weight.
We explore Weyl and Dirac semimetals with tilted nodes as platforms for
realizing an intrinsic superconducting diode effect. Although tilting breaks
sufficient spatial and time-reversal symmetries, we prove that -- at least for
conventional $s$-wave singlet pairing -- the effect is forbidden by an emergent
particle-hole symmetry at low energies if the Fermi level is tuned to the
nodes. Then, as a stepping stone to the three-dimensional semimetals, we
analyze a minimal one-dimensional model with a tilted helical node using
Ginzburg-Landau theory. While one might naively expect a drastic enhancement of
the effect when the node turns from type-I to type-II, we find that the
presence of multiple Fermi pockets is more important as it enables multiple
pairing amplitudes with indepedent contributions to supercurrents in opposite
directions. Equipped with this insight, we construct minimal lattice models of
Weyl and Dirac semimetals and study the superconducting diode effect in them.
Once again, we see a substantial enhancement when the normal state has multiple
Fermi pockets per node that can accommodate more than one pairing channel. In
summary, this study sheds light on the key factors governing the intrinsic
superconducting diode effect in systems with asymmetric band structures and
paves the way for realizing it in topological semimetals.
It is known that intrinsic currents in magnetic metals often appear in the
direction perpendicular to the external field for linear and nonlinear
responses. Distinct from three kinds of known nonlinear currents, namely, the
Drude contribution, the Berry curvature dipole induced current and the Berry
connection polarization induced current, here we report a intrinsic nonlinear
current with breaking time-reversal symmetry. This new kind of intrinsic
nonlinear current from the nontrivial Berry connection polarizability may
emerge in the longitudinal or transverse direction, and both are dissipative
Ohmic currents. We unveil 66 magnetic point group symmetries that can
accommodate such nonlinear current, and possible candidate materials are
proposed. This theory is also applied to observe the nonlinear current we
proposed in one- and two-dimensional Dirac systems as examples.
We report the observation of second harmonic generation with high conversion
efficiency $\sim 0.005\%$ in the terahertz regime from thin films of the
topological insulator Bi$_2$Se$_3$ that exhibit the linear photogalvanic
effect, measured via time-domain terahertz spectroscopy and terahertz emission,
respectively. As neither phenomena is observable from topologically trivial
In-doped Bi$_2$Se$_3$, and since no enhancement is observed when subject to
band bending, the efficient thickness-independent nonliear responses are
attributable to the Dirac fermions of topological surface states of
Bi$_2$Se$_3$. This observation of intrinsic terahertz second harmonic
generation in an equilibrium system unlocks the full suite of both even and odd
harmonic orders in the terahertz regime and opens new pathways to probing
quantum geometry via intraband nonlinear processes.
Stacking and twisting atom-thin sheets create superlattice structures with
unique emergent properties, while tailored light fields can manipulate coherent
electron transport on ultrafast timescales. The unification of these two
approaches may lead to ultrafast creation and manipulation of band structure
properties, which is a crucial objective for the advancement of quantum
technology. Here, we address this by demonstrating a tailored lightwave-driven
analogue to twisted layer stacking. This results in sub-femtosecond control of
time-reversal symmetry breaking and thereby band structure engineering in a
hexagonal boron nitride monolayer. The results practically demonstrate the
realization of the topological Haldane model in an insulator. Twisting the
lightwave relative to the lattice orientation enables switching between band
configurations, providing unprecedented control over the magnitude and location
of the band gap, and curvature. A resultant asymmetric population at
complementary quantum valleys lead to a measurable valley Hall current,
detected via optical harmonic polarimetry. The universality and robustness of
the demonstrated sub-femtosecond control opens a new way to band structure
engineering on the fly paving a way towards large-scale ultrafast quantum
devices for real-world applications.
The flow of electric current through a two-dimensional material in a magnetic
field gives rise to the family of Hall effects. The quantum versions of these
effects accommodate robust electronic edge channels and fractional charges.
Recently, the Hall effect of skyrmions, classical magnetic quasiparticles with
a quantized topological charge, has been theoretically and experimentally
reported, igniting ideas on a quantum version of this effect. To this end, we
perform dynamical mean field theory calculations on localized $f$ electrons
coupled to itinerant $c$ electrons in the presence of spin-orbit interaction
and a magnetic field. Our calculations reveal localized nano quantum skyrmions
that start moving transversally when a charge current in the itinerant
electrons is applied. The results show the time-transient build-up of the
quantum skyrmion Hall effect, accompanied by an Edelstein effect and a
magnetoelectric effect that rotate the spins. This work motivates studies about
the steady state of the quantum skyrmion Hall effect, looking for eventual
quantum skyrmion edge channels and their transport properties.
Unconventional topological quasiparticles have recently garnered significant
attention in the realm of condensed matter physics. Here, based on
first-principles calculations and symmetry analysis, we reveal the coexistence
of multiple types of interesting unconventional topological quasiparticles in
the phonon spectrum of the chiral crystal CsBe$_2$F$_5$. Specifically, we
identified eight entangled phonon bands in CsBe$_2$F$_5$, which give rise to
various unconventional topological quasiparticles, including the spin-1 Weyl
point, the charge-2 Dirac point, the nodal surface, and the hourglass nodal
loop. We demonstrate that these unconventional topological quasiparticles are
protected by crystal symmetry. We show that there are two large Fermi arcs
connecting projections of the bulk spin-1 Weyl point and charge-2 Dirac point
on the (001) surface and across the entire surface Brillouin zone. Our work not
only elucidates the intriguing topological properties of chiral crystals but
also provides an excellent material platform for exploring the fascinating
physics associated with multiple types of unconventional topological
quasiparticles.
We study the non equilibrium Casimir-Lifshitz force between graphene-based
parallel structures held at different temperatures and in presence of an
external thermal bath at a third temperature. The graphene conductivity, which
is itself a function of temperature, as well as of chemical potential, allows
us to tune in situ the Casimir-Lifshitz force. We explore different non
equilibrium configurations while considering different values of the graphene
chemical potential. Particularly interesting cases are investigated, where the
force can change sign going from attractive to repulsive or where the force
becomes non monotonic with respect to chemical potential variations, contrary
to the behaviour under thermal equilibrium.
We model the influence of an in-plane magnetic field on the orbital motion of
electrons in rhombohedral graphene multilayers. For zero field, the low-energy
band structure includes a pair of flat bands near zero energy which are
localized on the surface layers of a finite thin film. For finite field, we
find that the zero-energy bands persist and that level bifurcations occur at
energies determined by the component of the in-plane wave vector $q$ that is
parallel to the external field. The occurrence of level bifurcations is
explained by invoking semiclassical quantization of the zero field Fermi
surface of rhombohedral graphite. We find parameter regions with a single
isoenergetic contour of Berry phase zero corresponding to a conventional Landau
level spectrum and regions with two isoenergetic contours, each of Berry phase
$\pi$, corresponding to a Dirac-like spectrum of levels. We write down an
analogous one-dimensional tight-binding model and relate the persistence of the
zero-energy bands in large magnetic fields to a soliton texture supporting
zero-energy states in the Su-Schreiffer-Heeger model. We show that different
states contributing to the zero-energy flat bands in rhombohedral graphene
multilayers in a large field, as determined by the wave vector $q$, are
localized on different bulk layers of the system, not just the surfaces.
Manipulating the interlayer twist angle is a powerful tool to tailor the
properties of layered two-dimensional crystals. The twist angle has a
determinant impact on these systems' atomistic structure and electronic
properties. This includes the corrugation of individual layers, formation of
stacking domains and other structural elements, and electronic structure
changes due to the atomic reconstruction and superlattice effects. However, how
these properties change with the twist angle (ta) is not yet well understood.
Here, we monitor the change of twisted bilayer MoS2 characteristics as function
of ta. We identify distinct structural regimes, with particular structural and
electronic properties. We employ a hierarchical approach ranging from a
reactive force field through the density-functional-based tight-binding
approach and density-functional theory. To obtain a comprehensive overview, we
analyzed a large number of twisted bilayers with twist angles in the range
0.2-59.6deg. Some systems include up to half a million atoms, making structure
optimization and electronic property calculation challenging. For 13<ta<47, the
structure is well-described by a moir\'e regime composed of two rigidly twisted
monolayers. At small ta (ta<3 and 57<ta), a domain-soliton regime evolves,
where the structure contains large triangular stacking domains, separated by a
network of strain solitons and short-ranged high-energy nodes. The corrugation
of the layers and the emerging superlattice of solitons and stacking domains
affects the electronic structure. Emerging predominant characteristic features
are Dirac cones at K and kagome bands. These features flatten for ta
approaching 0 and 60deg. Our results show at which ta range the characteristic
features of the reconstruction emerge and give rise to exciting electronics. We
expect our findings also to be relevant for other twisted bilayer systems.
Topology is now securely established as a means to explore and classify
electronic states in crystalline solids. This review provides a gentle but firm
introduction to topological electronic band structure suitable for new
researchers in the field. I begin by outlining the relevant concepts from
topology, then give a summary of the theory of non-interacting electrons in
periodic potentials. Next, I explain the concepts of the Berry phase and Berry
curvature, and derive key formulae. The remainder of the article deals with how
these ideas are applied to classify crystalline solids according to the
topology of the electronic states, and the implications for observable
properties. Among the topics covered are the role of symmetry in determining
band degeneracies in momentum space, the Chern number and Z2 topological
invariants, surface electronic states, two- and three-dimensional topological
insulators, and Weyl and Dirac semimetals
We investigate the interplay between the quantum Hall (QH) effect and
superconductivity in InAs surface quantum well (SQW)/NbTiN heterostructures
using a quantum point contact (QPC). We use QPC to control the proximity of the
edge states to the superconductor. By measuring the upstream and downstream
resistances of the device, we investigate the efficiency of Andreev conversion
at the InAs/NbTiN interface. Our experimental data is analyzed using the
Landauer-Buttiker formalism, generalized to allow for Andreev reflection
processes. We show that by varying the voltage of the QPC, $V_{QPC}$, the
average Andreev reflection, $A$, at the QH-SC interface can be tuned from 50%
to 10%. The evolution of $A$ with $V_{QPC}$ extracted from the measurements
exhibits plateaus separated by regions for which $A$ varies continuously with
$V_{QPC}$. The presence of plateaus suggests that for some ranges of $V_{QPC}$
the QPC might be pinching off almost completely from the QH-SC interface some
of the edge modes. Our work shows a new experimental setup to control and
advance the understanding of the complex interplay between superconductivity
and QH effect in two-dimensional electron gas systems.
Generative models offer a direct way to model complex data. Among them,
energy-based models provide us with a neural network model that aims to
accurately reproduce all statistical correlations observed in the data at the
level of the Boltzmann weight of the model. However, one challenge is to
understand the physical interpretation of such models. In this study, we
propose a simple solution by implementing a direct mapping between the energy
function of the Restricted Boltzmann Machine and an effective Ising spin
Hamiltonian that includes high-order interactions between spins. This mapping
includes interactions of all possible orders, going beyond the conventional
pairwise interactions typically considered in the inverse Ising approach, and
allowing the description of complex datasets. Earlier works attempted to
achieve this goal, but the proposed mappings did not do properly treat the
complexity of the problem or did not contain direct prescriptions for practical
application. To validate our method, we performed several controlled numerical
experiments where we trained the RBMs using equilibrium samples of predefined
models containing local external fields, two-body and three-body interactions
in various low-dimensional topologies. The results demonstrate the
effectiveness of our proposed approach in learning the correct interaction
network and pave the way for its application in modeling interesting datasets.
We also evaluate the quality of the inferred model based on different training
methods.
Topological superconductors present an ideal platform for exploring
nontrivial superconductivity and realizing Majorana boundary modes in
materials. However, finding a single-phase topological material with nontrivial
superconducting states is a challenge. Here, we predict nontrivial
superconductivity in the pristine chiral metal RhGe with a transition
temperature of 5.8 K. Chiral symmetries in RhGe enforce multifold Weyl fermions
at high-symmetry momentum points and spin-polarized Fermi arc states that span
the whole surface Brillouin zone. These bulk and surface chiral states support
multiple type-II van Hove singularities that enhance superconductivity in RhGe.
Our detailed analysis of superconducting pairing symmetries involving Chiral
Fermi pockets in RhGe, indicates the presence of nontrivial superconducting
pairing. Our study establishes RhGe as a promising candidate material for
hosting mixed-parity pairing and topological superconductivity.

Date of feed: Thu, 21 Sep 2023 00:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Anomalous crystalline-electromagnetic responses in semimetals. (arXiv:2309.10840v1 [cond-mat.mes-hall])**

Mark R. Hirsbrunner, Oleg Dubinkin, Fiona J. Burnell, Taylor L. Hughes

**Effect of interatomic repulsion on Majorana zero modes in a coupled quantum-dot-superconducting-nanowire hybrid system. (arXiv:2309.10888v1 [cond-mat.mes-hall])**

R. Kenyi Takagui Perez, A. A. Aligia, Centro Atomico Bariloche, Instituto Balseiro

**Anomalous microwave response in the dissipative regime of topological superconducting devices based on Bi2Te2.3Se0.7. (arXiv:2309.10897v1 [cond-mat.supr-con])**

Vasily Stolyarov, Sergei Kozlov, Dmitry Yakovlev, Nicolas Bergeal, Cheryl Feuillet-Palma, Dmitry Lvov, Olga Skryabina, Mikhail Kupriyanov, Alexander Golubov, Dimitri Roditchev

**Impact of micro-indentation load/time and Zinc concentration on the thermo-mechanical characteristics of amorphous Se$_{78}$Te$_{20}$Sn$_2$ alloy. (arXiv:2309.10915v1 [cond-mat.mtrl-sci])**

Vishnu Saraswat A. Dahshan, H. I. Elsaeedy, Neeraj Mehta

**Biaxial Strain Enhances Electron Mobility of Monolayer Transition Metal Dichalcogenides. (arXiv:2309.10939v1 [cond-mat.mes-hall])**

Jerry Austin Yang, Robert Kevin Arran Bennett, Lauren Hoang, Zhepeng Zhang, Kamila Jewell Thompson, Andrew Jacob Mannix, E. Pop

**Revealing the conduction band and pseudovector potential in 2D moir\'e semiconductors. (arXiv:2309.10964v1 [cond-mat.mes-hall])**

Abigail J. Graham, Heonjoon Park, Paul V. Nguyen, James Nunn, Viktor Kandyba, Mattia Cattelan, Alessio Giampietri, Alexei Barinov, Kenji Watanabe, Takashi Taniguchi, Anton Andreev, Mark Rudner, Xiaodong Xu, Neil R. Wilson, David H. Cobden

**Gauge Theories of Josephson Junction Arrays: Why Disorder Is Irrelevant for the Electric Response of Disordered Superconducting Films. (arXiv:2309.11098v1 [cond-mat.supr-con])**

Carlo A. Trugenberger

**Electrostatic environment and Majorana bound states in full-shell topological insulator nanowires. (arXiv:2309.11149v1 [cond-mat.mes-hall])**

Li Chen, Xiao-Hong Pan, Zhan Cao, Dong E. Liu, Xin Liu

**Evaluating Gilbert Damping in Magnetic Insulators from First Principles. (arXiv:2309.11152v1 [cond-mat.mtrl-sci])**

Liangliang Hong, Changsong Xu, Hongjun Xiang

**Generalized Kohn-Sham Approach for the Electronic Band Structure of Spin-Orbit Coupled Materials. (arXiv:2309.11158v1 [cond-mat.mtrl-sci])**

Jacques K. Desmarais, Giacomo Ambrogio, Giovanni Vignale, Alessandro Erba, Stefano Pittalis

**Composition-dependent absorption of radiation in semiconducting MSi2Z4 Monolayers. (arXiv:2309.11163v1 [cond-mat.mtrl-sci])**

Muhammad Sufyan Ramzan, Tomasz Woźniak, Agnieszka Kuc, Caterina Cocchi

**Universal direction in thermoosmosis of a near-critical binary fluid mixture. (arXiv:2309.11208v1 [cond-mat.soft])**

Shunsuke Yabunaka, Youhei Fujitani

**Thermoosmosis of a near-critical binary fluid mixture: a general formulation and universal flow direction. (arXiv:2309.11211v1 [cond-mat.soft])**

Youhei Fujitani, Shunsuke Yabunaka

**Origin of the gap in the surface states of the antiferromagnetic topological insulator. (arXiv:2309.11216v1 [cond-mat.mes-hall])**

R. S. Akzyanov, A. L. Rakhmanov

**Atomic-scale visualization of multiferroicity in monolayer NiI$_2$. (arXiv:2309.11217v1 [cond-mat.mtrl-sci])**

Mohammad Amini, Adolfo O. Fumega, Héctor González-Herrero, Viliam Vaňo, Shawulienu Kezilebieke, Jose L. Lado, Peter Liljeroth

**Variability and Reliability of Graphene Field-Effect Transistors with CaF2 Insulators. (arXiv:2309.11233v1 [physics.app-ph])**

Yury Yu. Illarionov, Theresia Knobloch, Burkay Uzlu, Alexander G. Banshikov, Iliya A. Ivanov, Viktor Sverdlov, Mikhail I. Vexler, Michael Waltl, Zhenxing Wang, Bibhas Manna, Daniel Neumaier, Max C. Lemme, Nikolai S. Sokolov, Tibor Grasser

**1D-confined crystallization routes for tungsten phosphides. (arXiv:2309.11314v1 [cond-mat.mtrl-sci])**

Gangtae Jin, Christian D. Multunas, James L. Hart, Mehrdad T. Kiani, Quynh P. Sam, Han Wang, Yeryun Cheon, Khoan Duong, David J. Hynek, Hyeuk Jin Han, Ravishankar Sundararaman, Judy J. Cha

**Transport-based fusion that distinguishes between Majorana and Andreev bound states. (arXiv:2309.11328v1 [cond-mat.mes-hall])**

Maximilian Nitsch, Rubén Seoane Souto, Stephanie Matern, Martin Leijnse

**Energetics of twisted elastic filament pairs. (arXiv:2309.11344v1 [cond-mat.soft])**

Julien Chopin, Animesh Biswas, Arshad Kudrolli

**Orientational dynamics in supercooled glycerol computed from MD simulations: self and cross contributions. (arXiv:2309.11369v1 [cond-mat.soft])**

Marceau Hénot, Pierre-Michel Déjardin, François Ladieu

**Flat band superconductivity in a system with a tunable quantum metric : the stub lattice. (arXiv:2309.11440v1 [cond-mat.supr-con])**

Maxime Thumin, Georges Bouzerar

**Intrinsic superconducting diode effects in tilted Weyl and Dirac semimetals. (arXiv:2309.11501v1 [cond-mat.supr-con])**

Kai Chen, Bishnu Karki, Pavan Hosur

**An intrinsic nonlinear Ohmic current. (arXiv:2207.01182v3 [cond-mat.mes-hall] UPDATED)**

YuanDong Wang, ZhiFan Zhang, Zhen-Gang Zhu, Gang Su

**Observation of terahertz second harmonic generation from Dirac surface states in the topological insulator Bi$_2$Se$_3$. (arXiv:2301.05271v2 [cond-mat.str-el] UPDATED)**

Jonathan Stensberg, Xingyue Han, Zhuoliang Ni, Xiong Yao, Xiaoyu Yuan, Debarghya Mallick, Akshat Gandhi, Seongshik Oh, Liang Wu

**Lightwave-controlled band engineering in quantum materials. (arXiv:2303.13044v2 [cond-mat.mes-hall] UPDATED)**

Sambit Mitra, Álvaro Jiménez-Galán, Marcel Neuhaus, Rui E F Silva, Volodymyr Pervak, Matthias F Kling, Shubhadeep Biswas

**The quantum skyrmion Hall effect in f electron systems. (arXiv:2304.08006v2 [cond-mat.str-el] UPDATED)**

Robert Peters, Jannis Neuhaus-Steinmetz, Thore Posske

**Multiple types of unconventional quasiparticles in the chiral crystal CsBe$_2$F$_5$. (arXiv:2305.06930v4 [cond-mat.mtrl-sci] UPDATED)**

Xin-Yue Kang, Jin-Yang Li, Si Li

**Casimir-Lifshitz force between graphene-based structures out of thermal equilibrium. (arXiv:2305.18946v3 [cond-mat.mes-hall] UPDATED)**

Youssef Jeyar, Kevin Austry, Minggang Luo, Brahim Guizal, H. B. Chan, Mauro Antezza

**Solitons induced by an in-plane magnetic field in rhombohedral multilayer graphene. (arXiv:2306.05237v2 [cond-mat.mes-hall] UPDATED)**

Max Tymczyszyn, Peter H. Cross, Edward McCann

**Relaxation effects in twisted bilayer molybdenum disulfide: structure, stability, and electronic properties. (arXiv:2306.07130v2 [cond-mat.mtrl-sci] UPDATED)**

Florian M. Arnold, Alireza Ghasemifard, Agnieszka Kuc, Jens Kunstmann, Thomas Heine

**Topological electronic bands in crystalline solids. (arXiv:2307.16258v2 [cond-mat.str-el] UPDATED)**

Andrew T. Boothroyd

**Andreev reflection of quantum Hall states through a quantum point contact. (arXiv:2309.01856v2 [cond-mat.mes-hall] UPDATED)**

Mehdi Hatefipour, Joseph J. Cuozzo, Ido Levy, William M. Strickland, Dylan Langone, Enrico Rossi, Javad Shabani

**Inferring effective couplings with Restricted Boltzmann Machines. (arXiv:2309.02292v2 [cond-mat.dis-nn] UPDATED)**

Aurélien Decelle, Cyril Furtlehner, Alfonso De Jesus Navas Gómez, Beatriz Seoane

**Unconventional superconducting pairing in a B20 Kramers Weyl semimetal. (arXiv:2309.05880v2 [cond-mat.supr-con] UPDATED)**

Sougata Mardanya, Mehdi Kargarian, Rahul Verma, Tay-Rong Chang, Sugata Chowdhury, Hsin Lin, Arun Bansil, Amit Agarwal, Bahadur Singh

Found 7 papers in prb We show that the chiral modes in circular graphene $pn$ junctions provide an advantage for spin manipulation via spin-orbit coupling compared to semiconductor platforms. We derive the effective Hamiltonian for the spin dynamics of the junction's zero modes and calculate their quantum phases. We find… The Dice lattice structure is similar to the graphene honeycomb lattice, but with an imbalance atom in each hexagon center giving rise to a dispersionless flat band, which intersects the pseudopsin $S=1$ Dirac bands through the Dirac point. In this work, we report a theoretical study on the thermopo… We report on a detailed investigation of the shell-filling sequence in electrostatically defined elliptic bilayer graphene quantum dots (QDs) in the regime of low charge carrier occupation, $N≤12$, by means of magnetotransport spectroscopy and numerical calculations. We show the necessity of includi… The flat band is a key ingredient for the realization of interesting quantum states for functionalities. In this paper, we investigate the conditions for the flat band in both monolayer and bilayer graphene under periodic strain. We find topological nearly flat bands with homogeneous distribution of… We demonstrate that level crossings at the Fermi energy serve as robust indicators for higher-order topology in two-dimensional superconductors of symmetry class D. These crossings occur when the boundary condition in one direction is continuously varied from periodic to open, revealing the topologi… We introduce a general mechanism for obtaining Weyl points in a stack of two-dimensional (2D) quasicrystals, which can be extended to any stack of aperiodic layers. We do so by driving a topological phase transition with the vertical crystal momentum as the tuning parameter, which leads to gap closu… A recent paper [Lee

Date of feed: Thu, 21 Sep 2023 03:17:15 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Chiral spin channels in curved graphene $pn$ junctions**

Dario Bercioux, Diego Frustaglia, and Alessandro De Martino

Author(s): Dario Bercioux, Diego Frustaglia, and Alessandro De Martino

[Phys. Rev. B 108, 115140] Published Wed Sep 20, 2023

**Thermopower of the dice lattice**

Han-Lin Liu, L. Hao, J. Wang, and Jun-Feng Liu

Author(s): Han-Lin Liu, L. Hao, J. Wang, and Jun-Feng Liu

[Phys. Rev. B 108, 115141] Published Wed Sep 20, 2023

**Impact of competing energy scales on the shell-filling sequence in elliptic bilayer graphene quantum dots**

S. Möller, L. Banszerus, A. Knothe, L. Valerius, K. Hecker, E. Icking, K. Watanabe, T. Taniguchi, C. Volk, and C. Stampfer

Author(s): S. Möller, L. Banszerus, A. Knothe, L. Valerius, K. Hecker, E. Icking, K. Watanabe, T. Taniguchi, C. Volk, and C. Stampfer

[Phys. Rev. B 108, 125128] Published Wed Sep 20, 2023

**Nearly flat Chern band in periodically strained monolayer and bilayer graphene**

Xiaohan Wan, Siddhartha Sarkar, Kai Sun, and Shi-Zeng Lin

Author(s): Xiaohan Wan, Siddhartha Sarkar, Kai Sun, and Shi-Zeng Lin

[Phys. Rev. B 108, 125129] Published Wed Sep 20, 2023

**Higher-order topological superconductors characterized by Fermi level crossings**

Hong Wang and Xiaoyu Zhu

Author(s): Hong Wang and Xiaoyu Zhu

[Phys. Rev. B 108, 125426] Published Wed Sep 20, 2023

**Quasicrystalline Weyl points and dense Fermi-Bragg arcs**

André Grossi e Fonseca, Thomas Christensen, John D. Joannopoulos, and Marin Soljačić

Author(s): André Grossi e Fonseca, Thomas Christensen, John D. Joannopoulos, and Marin Soljačić

[Phys. Rev. B 108, L121109] Published Wed Sep 20, 2023

**Electronic structure of the putative room-temperature superconductor ${\text{Pb}}_{9}\text{Cu}{({\text{PO}}_{4})}_{6}\text{O}$**

Liang Si and Karsten Held

Author(s): Liang Si and Karsten Held*et al.*, J. Kor. Cryst. Growth Cryst. Technol. **33**, 61 (2023)] provides some experimental indications that ${\mathrm{Pb}}_{10−x}{\mathrm{Cu}}_{x}{({\mathrm{PO}}_{4})}_{6}\mathrm{O}$ with $x≈1$, coined LK-99, might be a room-temperature superconductor at ambient pressure. Our densi…

[Phys. Rev. B 108, L121110] Published Wed Sep 20, 2023

Found 1 papers in prl Anhydrous sodium hydroxide, a common and structurally simple compound, shows spectacular isotope effects: NaOD undergoes a first-order transition, which is absent in NaOH. By combining

Date of feed: Thu, 21 Sep 2023 03:17:15 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **When Quantum Fluctuations Meet Structural Instabilities: The Isotope- and Pressure-Induced Phase Transition in the Quantum Paraelectric NaOH**

Sofiane Schaack, Etienne Mangaud, Erika Fallacara, Simon Huppert, Philippe Depondt, and Fabio Finocchi

Author(s): Sofiane Schaack, Etienne Mangaud, Erika Fallacara, Simon Huppert, Philippe Depondt, and Fabio Finocchi*ab initio* electronic structure calculations with Feynman path integrals, we show that NaOH is an unusual example of…

[Phys. Rev. Lett. 131, 126101] Published Wed Sep 20, 2023

Found 1 papers in pr_res Quantum theory allows the traversing of multiple channels in a superposition of different orders. When the order in which the channels are traversed is controlled by an auxiliary quantum system, various unknown parameters of the channels can be estimated by measuring only the control system, even wh…

Date of feed: Thu, 21 Sep 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Evading noise in multiparameter quantum metrology with indefinite causal order**

Aaron Z. Goldberg, Khabat Heshami, and L. L. Sánchez-Soto

Author(s): Aaron Z. Goldberg, Khabat Heshami, and L. L. Sánchez-Soto

[Phys. Rev. Research 5, 033198] Published Wed Sep 20, 2023

Found 2 papers in nano-lett

Date of feed: Wed, 20 Sep 2023 13:14:21 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **[ASAP] Pressure-Induced Dynamic Tuning of Interlayer Coupling in Twisted WSe2/WSe2 Homobilayers**

Xing Xie, Junnan Ding, Biao Wu, Haihong Zheng, Shaofei Li, Chang-Tian Wang, Jun He, Zongwen Liu, Jian-Tao Wang, and Yanping LiuNano LettersDOI: 10.1021/acs.nanolett.3c01640

**[ASAP] Two-Dimensional Silver-Chalcogenolate-Based Cluster-Assembled Material: A p-type Semiconductor**

Anish Kumar Das, Sourav Biswas, Arijit Kayal, Arthur C. Reber, Subhrajyoti Bhandary, Deepak Chopra, Joy Mitra, Shiv N. Khanna, and Sukhendu MandalNano LettersDOI: 10.1021/acs.nanolett.3c02269

Found 1 papers in comm-phys Communications Physics, Published online: 20 September 2023; doi:10.1038/s42005-023-01367-x**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99)