Found 53 papers in cond-mat The relativistic Foldy-Wouthuysen transformation is used for an advanced
description of planar graphene electrons in external fields and free
(2+1)-space. It is shown that the initial Dirac equation should contain usual
Dirac matrices but not the Pauli ones. The spin of graphene electrons is not
the isotopic spin and takes the values $\pm1/2$. The exact Foldy-Wouthuysen
Hamiltonian of a graphene electron in uniform and nonuniform magnetic fields is
derived. The exact energy spectrum agreeing with experimental data and exact
Foldy-Wouthuysen wave eigenfunctions are obtained. These eigenfunctions
describe multiwave (structured) states in (2+1)-space. It is proven that the
Hermite-Gauss beams exist even in the free space. In the multiwave
Hermite-Gauss states, graphene electrons acquire nonzero effective masses
dependent on a quantum number and move with group velocities which are less
than the Fermi velocity. Graphene electrons in a static electric field also can
exist in the multiwave Hermite-Gauss states defining non-spreading coherent
beams. These beams can be accelerated and decelerated.
We report mechanical, optical and thermoelectric properties of recently
fabricated Janus BiTeCl monolayer using density functional and semi-classical
Boltzmann transport theory. Janus BiTeCl monolayer exhibits a direct bandgap,
high carrier mobility (~10$^3$ cm$^2$V$^{-1}$s$^{-1}$) and high optical
absorption in the UV-visible region. The mechanical behavior of the Janus
BiTeCl monolayer is nearly isotropic having an ideal tensile strength ~ 15 GPa.
The higher value of the Gruneisen parameter ($\gamma$), a low value of phonon
group velocity (vg), and very little phonon scattering time ($\tau_p$) lead to
low lattice thermal conductivity (1.46 W/mK) of Janus BiTeCl monolayer. The
combined effect of thermal conductivity and electronic transport coefficients
of Janus BiTeCl monolayer results in the figure of merit (ZT) in the range of
0.43-0.75 at 300-500 K. Our results suggest Janus BiTeCl monolayer be a
potential candidate for optoelectronic and moderate temperature thermoelectric
applications.
The search for highly effective and environmentally safe photocatalysts for
water splitting and photovoltaic solar cells is essential for renewable solar
energy conversion and storage. Based on first principles calculations, we show
that novel 2D $\beta$-PdX$_2$ (X = S, Te) monolayer possesses excellent
stabilities and great potentials in solar energy conversion applications.
Comprehensive studies show that the $\beta$-PdX$_2$ monolayer exhibits
semiconductor characteristics with an indirect gap, suitable band alignment,
efficient carrier separation, and high solar to hydrogen (STH) efficiencies,
supporting its good photoelectronic performance. The surface catalytic and
adsorption/intercalation energies calculation reveals that the photogenerated
holes have adequate driving forces to render hydrogen reduction half-reactions
to proceed spontaneously and the ability to cover and incorporate water
molecules on $\beta$-PdX$_2$ monolayer. Besides, the $\beta$-PdX$_2$ monolayer
is promising donor material for excitonic solar cells with high photovoltaic
performance. More importantly, due to suitable donor band gap and small
conduction band offset in the proposed type-II heterostructure, the calculated
power conversion efficiencies (PCE) is calculated up to ~23%
($\beta$-PdX$_2$/WTe$_2$), ~21% ($\beta$-PdX$_2$/ MoTe$_2$) and ~18%
($\beta$-PdTe2/$\beta$-PdX$_2$), making it a promising candidate for solar
energy conversion applications.
In a cubic environment, the ground state of spin-orbit coupled $5d^2$ ions is
a non-Kramers $E_g$ doublet, which hosts quadrupole and octupole moments. A
series of $5d^2$ osmium double perovskites Ba$_2M$OsO$_6$ (M = Mg, Ca, Zn, Cd)
have recently been proposed to exhibit multipolar orders. We investigate the
structural properties of these materials using $\textit{ab}$-$\textit{initio}$
calculations and find that the cubic structure is unstable for the Cd compound
while the Mg, Ca, and Zn materials retain $Fm\bar{3}m$ symmetry. We show that
Ba$_2$CdOsO$_6$ favours a rhombohedral $R\bar{3}$ structure characterized by
$a^-a^-a^-$ octahedral tiltings as indicated by unstable $\mathcal{T}_{1g}$
phonon modes. Trigonal distortions split the excited $T_{2g}$ triplet into an
$E'_g$ doublet and an $A_g$ singlet, which may cross energy levels with the
$E_g$ doublet and suppress the multipolar physics. We find a window where $E_g$
remains the lowest energy state under trigonal distortion, enabling the
emergence of multipole phases in non-cubic crystal environments.
We describe the development, operation, and application of the 4D Camera -- a
576 by 576 pixel active pixel sensor for scanning/transmission electron
microscopy which operates at 87,000 Hz. The detector generates data at
approximately 480 Gbit/s which is captured by dedicated receiver computers with
a parallelized software infrastructure that has been implemented to process the
resulting 10 - 700 Gigabyte-sized raw datasets. The back illuminated detector
provides the ability to detect single electron events at accelerating voltages
from 30 - 300 keV. Through electron counting, the resulting sparse data sets
are reduced in size by 10 - 300x compared to the raw data, and open-source
sparsity-based processing algorithms offer rapid data analysis. The high frame
rate allows for large and complex 4D-STEM experiments to be accomplished with
typical STEM scanning parameters.
Light drives offer a potential tool for the dynamical control of magnetic
interactions in matter. We theoretically investigate the indirect exchange
coupling between two parallel chains of magnetic impurities on the surface of a
topological insulator, driven by a time-periodic circularly polarized light
field in the high-frequency, off-resonant, regime. We derive a closed-form
analytic expression for the spin susceptibility of the photon-dressed
topological insulator surface states and obtain the irradiation dependence of
the Ising, Heisenberg, and Dzyaloshinsky-Moriya exchange couplings between the
impurity chains. Our results show a two-pronged modification of these exchange
couplings by periodic drives. First, the RKKY oscillation period of the
exchange couplings can be extended by enhancing the driving strength. Secondly,
increasing driving strength enhances the envelope of RKKY oscillations of the
Heisenberg-type while suppressing those of the Ising-type and
Dzyaloshinsky-Moriya-type. Our work provides useful insights for realizing
Floquet engineering of collinear and non-collinear indirect exchange
interactions in topological insulating systems.
Creating nanopores in graphene is a powerful tool for engineering its
properties. Nanopores in graphene tune their electrical, optical, magnetic, and
mechanical properties. However, controlling nanopores formation at the
nanoscale level remains a significant challenge. We report an easy method to
control nanopore sizes using argon-plasma magnetron sputtering. By calculating
and measuring Raman spectra, we show that the nano-pores in graphene are
controllable and size-tunable. Furthermore, we report that the graphene Raman
mode around 1450 cm-1, which was attributed to the substrate effect, is due to
nanopores.
We also propose here a novel graphene device-based water filtration. Our
proposed concept of two graphene electrodes with nanopores on the substrate
(SiC and SiO2) makes it possible to have the highest permeability value,
keeping almost 100 % salt rejection and improving its mechanical properties.
These reported results are essential for developing water desalination
membranes based on graphene devices.
Ergodic kinetics, which are critical to equilibrium thermodynamics, can be
constrained by a system's topology. We study a model nanomagnetic array in
which such constraints visibly affect the behavior. In this system, magnetic
excitations connect into thermally active one-dimensional strings whose motion
can be imaged in real time. At high temperatures, we observe the merging,
breaking, and reconnecting of strings, resulting in the system transitioning
between topologically distinct configurations. Below a crossover temperature,
the string motion is dominated by simple changes in length and shape. In this
low temperature regime, the system is energetically stable because of its
inability to explore all possible topological configurations. This kinetic
crossover suggests a generalizable conception of topologically broken
ergodicity and limited equilibration.
Polymer topology, which plays a principal role in the rheology of polymeric
fluids, and non-equilibrium materials, which exhibit time-varying rheological
properties, are topics of intense investigation. Here, we push composites of
circular DNA and dextran out-of-equilibrium via enzymatic digestion of DNA
rings to linear fragments. Our time-resolved rheology measurements reveal
discrete state-switching, with composites undergoing abrupt transitions between
dissipative and elastic-like states. The gating time and lifetime of the
elastic-like states, and the magnitude and sharpness of the transitions, are
surprisingly decorrelated from digestion rates and non-monotonically depend on
the DNA fraction. We model our results using sigmoidal two-state functions to
show that bulk state-switching can arise from continuous molecular-level
activity due to the necessity for cooperative percolation of entanglements to
support macroscopic stresses. Our platform, coupling the tunability of
topological composites with the power of enzymatic reactions, may be leveraged
for diverse material applications from wound-healing to self-repairing
infrastructure.
The Clifford spectrum is a form of joint spectrum for noncommuting matrices.
This theory has has been applied in photonics, condensed matter and string
theory. In applications, the Clifford spectrum can be efficiently approximated
using numerical methods. Here we examine the higher-dimensional spheres that
can arise from theoretical examples. We also look at how to generate five real
symmetric almost commuting matrices that have a $K$-theoretical obstruction to
being close to commuting matrices. For this, we look to matrix models of
topological electric circuits.
The Ginzburg-Landau-based upper critical magnetic field $H_{\textrm{C2}}$ (0)
$\approx$ 88 T for N-doped lutetium hydride, reported in Dasenbrock-Gammon et
al., Nature $\textbf{615}$, 244 (2023), is obtained therein by modeling
resistance behavior, defining transitions widths, and applying magnetic fields
$H$ = 1 T and 3 T. A method is presented herein for determining the critical
temperature $T_{\textrm{C}}$ ($H$) directly from the resistance drops in the
source data, implying a temperature slope -d$H_{\textrm{C2}}$ /d$T$ of 0.46(6)
${-}$ 0.51(5) T/K and, by applying pure BCS theory, an $H_{\textrm{C2}}$ (0) of
71(10) ${-}$ 79(8) T.
Single layer $\alpha$-ruthenium trichloride ($\rm\alpha-RuCl_3$) has been
proposed as a potential quantum spin liquid. Graphene/$\rm RuCl_3$
heterobilayers have been extensively studied with a focus on their large
interlayer electron transfer driven by a chemical potential difference, which
dopes both materials. Here we examine the possibility of probing the magnetic
state of the \ce{RuCl_3} layer by measuring transport in an adjacent graphene
layer. We perform self-consistent Hartree-Fock calculations on a
Hubbard-Kanamori model of the $4d^5$ $t_{2g}$ electrons of $\rm \alpha-RuCl_3$
and confirm that out-of-plane ferromagnetic and zigzag antiferromagnetic states
are energetically competitive. We show that the influence of hybridization
between graphene and $\rm RuCl_3$ bands is strongly sensitive to the magnetic
configuration of $\rm RuCl_3$ and the relative orientations of the two layers,
and argue that it can alter the conductivity of the graphene layer. Our
analysis can be applied to any van der Waals heterobilayer system with weak
interlayer hybridization and allows for arbitrary lattice constant mismatch and
relative orientation.
There has been a recent surge of interest in using light and sound as
platforms for studying non-Abelian physics. Through a kaleidoscope of physical
effects, light and sound provide diverse ways to manipulate their degrees of
freedom to constitute the Hilbert space for demonstrating non-Abelian
phenomena. The review aims to provide a timely and comprehensive account of
this emerging topic. Starting from the foundation of matrix-valued geometric
phases, we cover non-Abelian topological charges, non-Abelian gauge fields,
non-Abelian braiding, non-Hermitian non-Abelian phenomena, and their
realizations with photonics and acoustics. This topic is fast evolving at the
intersection of atomic, molecular, optical physics, condensed matter physics,
and mathematical physics, with fascinating prospects ahead.
Rare-earth (RE) based honeycomb-lattice materials with strong spin-orbit
coupled Jeff=1/2 moments have attracted great interest as a platform to realize
Kitaev quantum spin liquid (QSL) state. Herein, we report the discovery of a
new family of RE based honeycomb-lattice magnets Ba9RE2(SiO4)6(RE=Ho-Yb), which
crystallize into the rhombohedral structure with space group R-3. In these
serial compounds, magnetic RE3+ ions are arranged on a perfect honeycomb
lattice within the ab-plane and stacked in the ABCABC-type fashion along the
c-axis. All Ba9RE2(SiO4)6(RE=Ho-Yb) polycrystals exhibit the dominant
antiferromagnetic interactions and absence of magnetic order down to 2 K. In
combination with the magnetization and electron spin resonance (ESR) results,
distinct anisotropic magnetic behaviors are proposed for compounds with
different RE ions. Moreover, the synthesized Ba9Yb2Si6O24 single crystals show
large magnetic frustration and no long-range magnetic ordering down to 0.15 K,
being a possible QSL candidate state. These serial compounds are attractive for
exploring the exotic magnetic phases of Kitaev materials with 4f electrons.
Magnetostriction drives a rhombohedral distortion in the cubic rock salt
antiferromagnet MnO at the N\'eel temperature $T_{N}=118$ K. As an unexpected
consequence we show that this distortion acts to localize the site of an
implanted muon due to the accompanying redistribution of electron density. This
lifts the degeneracy between equivalent sites, resulting in a single observed
muon precession frequency. Above $T_{N}$, the muon instead becomes delocalized
around a network of equivalent sites. Our first-principles simulations based on
Hubbard-corrected density-functional theory and molecular dynamics are
consistent with our experimental data and help to resolve a long-standing
puzzle regarding muon data on MnO, as well as having wider applicability to
other magnetic oxides.
Diamond single crystals showing Infra-red features of pressurized CO2-I phase
were studied using Transmission Electron Microscopy (TEM) and tomography.
Numerous O-containing precipitates with sizes up to 45 nm are observed. The
absolute majority of these precipitates decorate dislocation loops or are
located inside them; individual scattered precipitates are also present.
Morphology of the precipitates varies from quasi-isometric octahedra to highly
flattened elongated ones. Close association of the precipitates with the
dislocation loops implies their formation by exsolution of oxygen impurity from
diamond lattice; the size distribution of the precipitates suggests that the
equilibrium state is not yet reached. Presumably, the morphology and precise
chemical composition depend on P-T-t evolution of the diamond crystal and
corresponding changes in oxygen supersaturation in the lattice. The
CO2-containing diamonds often contain micron-sized hexagonal lamellar
inclusions. TEM investigation of a lamellae reveals that it consists of high
quality graphite showing partial epitaxial relation with comprising diamond.
The gap between the graphite and diamond may be enriched with oxygen impurity.
A crystal structure with a point defect typically returns to its ideal local
structure upon moving a few bond lengths away from the defect; topological
defects such as dislocations or disclinations also heal rapidly in this regard.
Here we describe a simple point defect -- a two-fold atom incorporated at the
growth edge of a 2D hexagonal honeycomb material -- whose healing may require a
defect complex with 50 or more atoms. $\textit{Topologically}$ the two-fold
atom disappears into a single 'long bond' between its neighbors, thereby
inducing a pentagonal disclination. However, $\textit{chemically}$ this
disclination occupies as much physical space as a six-fold ring. This
incompatibility of chemistry and topology can cause a ''ringing'' of the
Gaussian curvature that creates an expansive healing region and may even spawn
a semi-infinite grain boundary propagating outwards from the topological scar.
While a parent Hamiltonian for Laughlin $1/3$ wave function has been long
known in terms of the Haldane pseudopotentials, no parent Hamiltonians are
known for the lowest-Landau-level projected wave functions of the composite
fermion theory at $n/(2n+1)$ with $n\geq2$. If one takes the two lowest Landau
levels to be degenerate, the Trugman-Kivelson interaction produces the
unprojected 2/5 wave function as the unique zero energy solution. If the lowest
three Landau levels are assumed to be degenerate, the Trugman-Kivelson
interaction produces a large number of zero energy states at $\nu=3/7$. We
propose that adding an appropriately constructed three-body interaction yields
the unprojected $3/7$ wave function as the unique zero energy solution, and
report extensive exact diagonalization studies that provide strong support to
this proposal.
We argue that spin and valley-polarized metallic phases recently observed in
graphene bilayers and trilayers support chiral edge modes that allow spin waves
to propagate ballistically along system boundaries without backscattering. The
chiral edge behavior originates from the interplay between the momentum-space
Berry curvature in Dirac bands and the geometric phase of a spin texture in
position space. The edge modes are weakly confined to the edge, featuring
dispersion which is robust and insensitive to the detailed profile of
magnetization at the edge. This unique character of edge modes reduces their
overlap with edge disorder and enhances the mode lifetime. The mode propagation
direction reverses upon reversing valley polarization, an effect that provides
a clear testable signature of geometric interactions in isospin-polarized Dirac
bands.
Activity can organize matter in unique configurations inaccessible to
equilibrium systems, including a sundry of spiraling shapes seen in nature that
range from galaxies to living tissues to fossilized stromatolites. How these
dynamic yet stable patterns form in motile active systems that span a range of
length and time scales remains an open question. Here we study the collective
gliding dynamics of ultra-long filamentous cyanobacteria confined in two
dimensions and present the discovery of an emergent pattern we call ``active
spirals". Individual filaments in the spiral bulk remain confluent due to
adhesion forces and exhibit reversible gliding motility. Thus individual
filaments undergo bidirectional movement and the spiral object as a whole has
no fixed vorticity. Using single filament tracking, we discover that spirals
permit the radial flux of material as filaments shear past one another. We
demonstrate that these rearrangements can be entirely described by topological
rules of interaction between filaments tips. We thus reduce the dynamics of a
spiral to a set of active dislocations (corresponding to the filament tips) on
a polar coordinate lattice and show that we can reproduce and predict the
material flux in the system. Finally, we present a discovery of a novel
topological trap present in these spirals, and is induced purely by the
geometric chirality of long winding filaments with winding number greater than
zero. A topological trap creates boundaries in the spiral across which material
cannot flow, leading to persistent structures that are topologically locked for
the lifetime of the system. The emergent mechanics of active spirals presented
here sheds light on the critical role of adhesion forces, activity and geometry
in the formation of long-term, stable, yet dynamic active patterns.
Artificial lattices have been used as a platform to extend the application of
topological physics beyond electronic systems. Here, using the two-dimensional
Lieb lattice as a prototypical example, we show that an array of disks which
each support localized plasmon modes give rise to an analog of the quantum spin
Hall state enforced by a synthetic time reversal symmetry. We find that an
effective next-nearest-neighbor coupling mechanism intrinsic to the plasmonic
disk array introduces a nontrivial $Z_2$ topological order and gaps out the
Bloch spectrum. A faithful mapping of the plasmonic system onto a tight-binding
model is developed and shown to capture its essential topological signatures.
Full wave numerical simulations of graphene disks arranged in a Lieb lattice
confirm the existence of propagating helical boundary modes in the nontrivial
band gap.
Continued advances in quantum technologies rely on producing nanometer-scale
wires. Although several state-of-the-art nanolithographic technologies and
bottom-up synthesis processes have been used to engineer such wires, critical
challenges remain in growing uniform atomic-scale crystalline wires and
constructing their network structures. Here we discover a simple method to
fabricate atomic-scale wires with various arrangements, including stripes, X-,
Y-junctions, and nanorings. Single-crystalline atomic-scale wires of a Mott
insulator, whose band gap is comparable to those of wide-gap semiconductors,
are spontaneously grown on graphite substrates \DEL{and epitaxial monolayer
graphene on SiC }by pulsed-laser deposition. These wires are
one-unit-cell-thick and have an exact width of two- and four-unit-cells (1.4
and 2.8\,nm) and lengths up to a few $\mu m$. We show that the non-equilibrium
reaction-diffusion processes may play an essential role in atomic pattern
formation. Our findings offer a new perspective on the non-equilibrium
self-organization phenomena on an atomic scale, paving a unique way for the
quantum architecture of nano-network.
Single crystals of non-centrosymmetric $s$-wave superconductor
LaPt$_{0.88}$Si$_{1.12}$ have been grown by the Czochralski (Cz) technique,
whose crystal structure is described by the space group $I4{_1}md$ at ambient
conditions. The inter-site mixing between platinum and silicon is confirmed by
both single-crystal x-ray diffraction (SXRD) and electron probe micro-analyzer
(EPMA). The disordered material exhibits a lower superconducting (SC)
transition temperature $T_c$ at 2.02 K as opposed to the highest value of 3.9 K
reported in polycrystalline LaPtSi without inter-site mixing. From specific
heat, the Sommerfeld coefficient ($\gamma$) is estimated to be 7.85 mJ/mol
K$^2$, which is much larger than the values reported for the samples exhibiting
higher $T_c$. This is unprecedented as $T_c$ seems to decrease with increase in
the electron density of states (DOS) at the Fermi energy and thus $\gamma$. The
present work reports on the anomalous behaviour of SC and normal state
properties of LaPt$_{x}$Si$_{2-x}$, presumably caused due to the existence of
non-trivial topological bands.
As a prototype of the Weyl superconductor, layered molybdenum telluride
(MoTe2) encompasses two semimetallic phases (1T_prime and Td) which
differentiate from each other via a slight tilting of the out-of-plane lattice.
Both phases are subjected to serious phase mixing which complicates the
analysis of its origin of superconductivity. Herein, we explore the
electron-phonon coupling (EPC) of the monolayer semimetallic MoTe2, without
phase ambiguity under this thickness limit. Apart from the hardening or
softening of phonon modes, the strength of the EPC can be strongly modulated by
doping. Specifically, longitudinal and out-of-plane acoustic modes are
significantly activated for electron doped MoTe2. This is ascribed to the
presence of rich valley states and equispaced nesting bands which are
dynamically populated under charge doping. Through comparing the monolayer and
bilayer MoTe2, the strength of EPC is found to be less likely to depend on
thickness for neutral samples but clearly promoted for thinner samples with
electron doping, while for hole doping, the strength alters more significantly
with the thickness than doping. Our work explains the puzzling issue of the
doping sensitivity of the superconductivity in semimetallic MoTe2 and
establishes the critical role of activating acoustic phonons in such
low-dimensional materials.
Four-nitrogen-containing 5,6,13,14-Tetraazapentacene (BTANC) has attracted
attention as a new n-type organic semiconductor with a rigid crystalline phase
due to intermolecular CH-N hydrogen bonding. However, in the thin film
transistor of BTANC, poor carrier transport properties and low stability in the
ambient condition have been reported so far; thus further refining and
understanding of the thin film of BTANC will be required. Here, by means of
carefully-controlled vacuum deposition of BTANC in the narrow window of
temperature avoiding impurity sublimation and thermal degradation of molecules,
we produced a well-defined monolayer on Cu(111) for molecular-level
investigations. Synchrotron photoemission of the monolayer revealed a
noticeable alteration of the chemical state of N atoms, which is unexpected for
the pure BTANC molecule. In addition, molecular imaging of the monolayer by
scanning tunneling microscope (STM) revealed that the molecular packing
structure in the monolayer significantly differed from that in the single
crystal of BTANC. These observations can be interpreted as a result of the
partial hydrogenation of N atoms in BTANC and the emergence of the NH-N type
intermolecular hydrogen bonding in the monolayer. These findings will provide a
general remark and strategy to control the molecular packing structure and
electronic property in the molecular films of the nitrogen-containing acenes,
by means of controlled hydrogenation.
The present study investigates the arrangement of hollow pyramidal cone
shells and their interactions with degenerate planar anchoring on the inner and
outer surfaces of particles within the nematic host. The shell thickness is in
order of the nematic coherence length. The numerical behavior of colloids is
determined by minimizing the Landau-de Gennes free energy in the presence of
the Fournier surface energy and using the finite element method. Colloidal
pyramidal cones can orient parallel and perpendicular with the far director
orientation. In the parallel alignment, we found the splay director distortion
into the pyramid with two boojum defects at the inner and outer tips. The
director shows bending distortion without defect patterns when the pyramid is
aligned perpendicularly. They induce long-range dipolar interaction and can
form nested structures in close contact.
Lattice relaxation in twistronic bilayers with close lattice parameters and
almost perfect crystallographic alignment of the layers results in the
transformation of moir\'e pattern into a sequence of preferential stacking
domains and domain wall networks. Here, we show that reconstructed moir\'e
superlattices of the perfectly aligned heterobilayers of same-chalcogen
transition metal dichalcogenides have broken-symmetry structures featuring
twisted nodes ('twirls') of domain wall networks. Analysing
twist-angle-dependences of strain characteristics for the broken-symmetry
structures we show that the formation of twirl reduces amount of hydrostatic
strain around the nodes, potentially, reducing their infuence on the band edge
energies of electrons and holes.
We show that competition between local interactions in monoaxial chiral
magnets provides the stability of two-dimensional (2D) solitons with identical
energies but opposite topological charges. These skyrmions and antiskyrmions
represent metastable states in a wide range of parameters above the transition
into the saturated ferromagnetic phase. The symmetry of the underlying
micromagnetic functional gives rise to soliton zero modes allowing efficient
control of their translational movement by the frequency of the circulating
external magnetic field. We also discuss the role of demagnetizing fields in
the energy balance between skyrmion and antiskyrmion and in their stability.
Magnetic skyrmions have raised high hopes for future spintronic devices. For
many applications it would be of great advantage to have more than one
metastable particle-like texture available. The coexistence of skyrmions and
antiskyrmions has been proposed in inversion symmetric magnets with exchange
frustration. However, so far only model systems have been studied and the
lifetime of coexisting metastable topological spin structures has not been
obtained. Here, we predict that skyrmions and antiskyrmions with diameters
below 10 nm can coexist at zero magnetic field in a Rh/Co bilayer on the
Ir(111) surface -- an experimentally feasible system. We show that the
lifetimes of metastable skyrmions and antiskyrmions in the ferromagnetic ground
state are above one hour for temperatures up to 75 K and 48 K, respectively.
The entropic contribution to the nucleation and annihilation rates differs for
skyrmions and antiskyrmions. This opens the route to thermally activated
creation of coexisting skyrmions and antiskyrmions in frustrated magnets with
Dzyaloshinskii-Moriya interaction.
The piezoelectric response is a measure of the sensitivity of a material's
polarization to stress or its strain to an applied field. Using in-operando
x-ray Bragg coherent diffraction imaging, we observe that topological vortices
are the source of a five-fold enhancement of the piezoelectric response near
the vortex core. The vortices form where several low symmetry ferroelectric
phases and phase boundaries coalesce. Unlike bulk ferroelectric solid solutions
in which a large piezoelectric response is associated with coexisting phases in
the proximity of the triple point, the largest responses for pure BaTiO3 at the
nanoscale are in spatial regions of extremely small spontaneous polarization at
vortex cores. The response decays inversely with polarization away from the
vortex, analogous to the behavior in bulk ceramics as the cation compositions
are varied away from the triple point. We use first-principles-based molecular
dynamics to augment our observations, and our results suggest that nanoscale
piezoelectric materials with large piezoelectric response can be designed
within a parameter space governed by vortex cores. Our findings have
implications for the development of next-generation nanoscale piezoelectric
materials.
Quantum Hall systems host chiral edge states extending along the
one-dimensional boundary of any two-dimensional sample. In solid state
materials, the edge states serve as perfectly robust transport channels that
produce a quantised Hall conductance; due to their chirality, and the
topological protection by the Chern number of the bulk bandstructure, they
cannot be spatially localized by defects or disorder. Here, we show
experimentally that the chiral edge states of a lossy quantum Hall system can
be localized. In a gyromagnetic photonic crystal exhibiting the quantum Hall
topological phase, an appropriately structured loss configuration imparts the
edge states' complex energy spectrum with a feature known as point-gap winding.
This intrinsically non-Hermitian topological invariant is distinct from the
Chern number invariant of the bulk (which remains intact) and induces mode
localization via the "non-Hermitian skin effect". The interplay of the two
topological phenomena - the Chern number and point-gap winding - gives rise to
a non-Hermitian generalisation of the paradigmatic Chern-type bulk-boundary
correspondence principle. Compared to previous realisations of the
non-Hermitian skin effect, the skin modes in this system have superior
robustness against local defects and disorders.
We theoretically investigate the lattice relaxation and the electronic
property in non-symemtric chiral TTGs by using an effective continuum model.
The relaxed lattice structure forms a patchwork of moir\'e-of-moir\'e domains,
where the moir\'e patterns given by layer 1 and 2, and layer 2 and 3 become
locally commensurate with a specific relative alignment. The band calculation
reveals a wide energy window (> 50 meV) with low density of states, featuring
sparsely distributed highly one-dimensional electron bands. The wave function
of these one-dimensional bands exhibits sharp localization at the boundaries
between super-moir\'e domains. By calculating the Chern number of the local
band structure within commensurate domains, the one-dimensional state is
identified as a topological boundary state between distinct Chern insulators.
The vortex in the $(2+1)$-dimensional $\mathrm{O}(2)$ model is studied via
numerical simulations in a fully non-perturbative lattice regularization. We
compute the vortex condensate and susceptibility to determine its critical
exponents and a renormalized condensate in the continuum limit. Together with
recent results on the vortex mass, this gives a complete picture of the scaling
behaviour of the vortex operator in this model and sheds light on the
statistical mechanics of topological excitations.
Many natural and artificial reactions including photosynthesis or
photopolymerization are initiated by stimulating organic molecules into an
excited state, which enables new reaction paths. Controlling light-matter
interaction can influence this key concept of photochemistry, however, it
remained a challenge to apply this strategy to control photochemical reactions
at the atomic scale. Here, we profit from the extreme confinement of the
electromagnetic field at the apex of a scanning tunneling microscope (STM) tip
to drive and control the rate of a free-base phthalocyanine
phototautomerization with submolecular precision. By tuning the laser
excitation wavelength and choosing the STM tip position, we control the
phototautomerization rate and the relative tautomer population. This
sub-molecular optical control can be used to study any other photochemical
processes.
We experimentally observe the quantum geometric tensor, namely the quantum
metric and the Berry curvature, for a square lattice of radiatively coupled
plasmonic nanoparticles. We observe a non-zero Berry curvature and show that it
arises solely from non-Hermitian effects. The quantum metric is found to
originate from a pseudospin-orbit coupling. The long-range nature of the
radiative interaction renders the behavior distinct from tight-binding systems:
Berry curvature and quantum metric are centered around high-symmetry lines of
the Brillouin zone instead of high-symmetry points. Our results inspire new
pathways in the design of topological systems by tailoring losses or gain.
We present a machine-learning model based on normalizing flows that is
trained to sample from the isobaric-isothermal (NPT) ensemble. In our approach,
we approximate the joint distribution of a fully-flexible triclinic simulation
box and particle coordinates to achieve a desired internal pressure. We test
our model on monatomic water in the cubic and hexagonal ice phases and find
excellent agreement of Gibbs free energies and other observables compared with
established baselines.
(2+1)-D chiral topological phases are often identified by studying low-lying
entanglement spectra (ES) of their wavefunctions on long cylinders of finite
circumference. For chiral topological states that possess global
$\mathrm{SU}(3)$ symmetry, we can now understand, as shown in this work, the
nature of the topological phase from the study of the splittings of
degeneracies in the finite-size ES, at a given momentum, solely from the
perspective of conformal field theory (CFT). This is a finer diagnostic than
Li-Haldane "state-counting", extending the approach of PRB 106, 035138 (2022)
by two of the authors. We contrast ES of such chiral topological states with
those of a non-chiral PEPS (Kure\v{c}i\'c, Sterdyniak, and Schuch [PRB 99,
045116 (2019)]) also possessing $\mathrm{SU}(3)$ symmetry. That latter PEPS has
the same discrete symmetry as the chiral PEPS: strong breaking of separate
time-reversal and reflection symmetries, with invariance under the product of
these two operations. However, the full analysis of the topological sectors of
the ES of the latter PEPS in prior work [arXiv:2207.03246] shows lack of
chirality, as would be manifested, e.g., by a vanishing chiral central charge.
In the present work, we identify a distinct indicator and hallmark of chirality
in the ES: the splittings of conjugate irreps. We prove that in the ES of the
chiral states conjugate irreps are exactly degenerate, because the operators
[related to the cubic Casimir invariant of $\mathrm{SU}(3)$] that would split
them are forbidden. By contrast, in the ES of non-chiral states, conjugate
splittings are demonstrably non-vanishing. Such a diagnostic significantly
simplifies identification of non-chirality in low-energy finite-size ES for
$\mathrm{SU}(3)$-symmetric topological states.
We theoretically predict the full quantum geometric tensor, comprising the
quantum metric and the Berry curvature, for a square lattice of plasmonic
nanoparticles. The gold nanoparticles act as dipole or multipole antenna
radiatively coupled over long distances. The photonic-plasmonic eigenfunctions
and energies of the system depend on momentum and polarization (pseudospin),
and their topological properties are encoded in the quantum geometric tensor.
By T-matrix numerical simulations, we identify a TE-TM band splitting at the
diagonals of the first Brillouin zone, that is not predicted by the empty
lattice band structure nor by the highly symmetric nature of the system.
Further, we find quantum metric around these regions of the reciprocal space,
and even a non-zero Berry curvature despite the trivial lattice geometry and
absence of magnetic field. We show that this non-zero Berry curvature arises
exclusively from non-Hermitian effects which break the time-reversal symmetry.
The quantum metric, in contrast, originates from a pseudospin-orbit coupling
given by the polarization and directional dependence of the radiation.
We use an established discrete element method (DEM) Reynolds-averaged
Navier--Stokes (RANS)-based numerical model to simulate non-suspended sediment
transport across conditions encompassing almost seven orders of magnitude in
the particle--fluid density ratio $s$, ranging from subaqueous transport
($s=2.65$) to aeolian transport in the highly rarefied atmosphere of Pluto
($s=10^7$), whereas previous DEM-based sediment transport studies did not
exceed terrestrial aeolian conditions ($s\approx2000$). Guided by these
simulations and by experiments, we semi-empirically derive simple scaling laws
for the cessation threshold and rate of equilibrium aeolian transport, both
exhibiting a rather unusual $s^{1/3}$-dependence. They constitute a simple
means to make predictions of aeolian processes across a large range of
planetary conditions. The derivation consists of a first-principle-based proof
of the statement that, under relatively mild assumptions, the cessation
threshold physics is controlled by only one dimensionless control parameter,
rather than two expected from dimensional analysis. Crucially, unlike existing
models, this proof does not resort to coarse-graining the particle phase of the
aeolian transport layer above the bed surface. From the pool of existing
models, only that by P\"ahtz et al. (\textit{J. Geophys. Res. Earth.
Surf.}~126, e2020JF005859, 2021) is somewhat consistent with the combined
numerical and experimental data. It captures the scaling of the cessation
threshold and the $s^{1/3}$-dependence of the transport rate, but fails to
capture the latter's superimposed grain size dependence. This hints at a lack
of understanding of the transport rate physics and calls for future studies on
this issue.
Weyl semimetal (WSM), a novel state of quantum matter, hosts Weyl fermions as
emergent quasiparticles resulting from the breaking of either inversion or
time-reversal symmetry. Magnetic WSMs that arise from broken time-reversal
symmetry provide an exceptional platform to understand the interplay between
magnetic order and Weyl physics, but few WSMs have been realized. Here, we
identify CeAlSi as a new non-centrosymmetric magnetic WSM via angle-resolved
photoemission spectroscopy (ARPES) and first-principles, density-functional
theory based calculations. Our surface-sensitive vacuum ultraviolet ARPES data
confirms the presence of surface Fermi arcs as, the smoking gun evidence for
the existence of the Weyl semimetallic state in CeAlSi. We also observe bulk
Weyl cones in CeAlSi using bulk-sensitive soft-X-ray ARPES measurements. In
addition, Ce 4f at bands are found near the Fermi level, indicating that CeAlSi
is a unique platform for investigating exotic quantum phenomena resulting from
the interaction of topology, magnetism and electronic correlations.
The rare-earth monopnictide (REM) family, which hosts magnetic ground states
with extreme magnetoresistance, has established itself as a fruitful playground
for the discovery of interesting topological phases. Here, by using
high-resolution angle-resolved photoemission spectroscopy complemented by
first-principles density functional-theory based modeling, we examine the
evolution of the electronic structure of the candidate REM Dirac semimetal NdSb
across the magnetic transition. A complex angel-wing-like band structure near
the zone center and three arc-like features at the zone corner have been
observed. This dramatic reconstruction of the itinerant bands around the zone
center is shown to be driven by the magnetic transition: Specifically,, the Nd
5d electron band backfolds at the Gamma point and hybridizes with the Sb 5p
hole bands in the antiferromagnetic phase. Our study indicates that
antiferromagnetism plays an intricate role in the electronic structure of the
REM family.
We derive BM-like continuum models for the bands of superlattice
heterostructures formed out of Fe-chalcogenide monolayers: (${\bf\text I}$) a
single monolayer experiencing an external periodic potential, and (${\bf\text
II}$) twisted bilayers with long-range moire tunneling. A symmetry derivation
for the inter-layer moire tunnelling is provided for both the $\Gamma$ and $M$
high-symmetry points. In this paper, we focus on moire bands formed from
hole-band maxima centered on $\Gamma$, and show the possibility of moire bands
with $C=0$ or $\pm 1$ topological quantum numbers without breaking
time-reversal symmetry. In the $C=0$ region for $\theta\rightarrow 0$ (and
similarly in the limit of large superlattice period for ${\bf\text I}$), the
system becomes a square lattice of 2D harmonic oscillators. We fit our model to
FeSe and argue that it is a viable platform for the simulation of the square
Hubbard model with tunable interaction strength.
We report on resonance Raman spectroscopy measurements with excitation photon
energy down to 1.16 eV on graphene, to study how low-energy carriers interact
with lattice vibrations. Thanks to the excitation energy close to the Dirac
point at $\mathbf{K}$, we unveil a giant increase of the intensity ratio
between the double-resonant 2D and 2D$^\prime$ peaks with respect to that
measured in graphite. Comparing with fully \textit{ab initio} theoretical
calculations, we conclude that the observation is explained by an enhanced,
momentum-dependent coupling between electrons and Brillouin zone-boundary
optical phonons. This finding applies to two dimensional Dirac systems and has
important consequences for the modeling of transport in graphene devices
operating at room temperature.
We show that a magnetic line defect on the surface of a topological insulator
generically supports two distinct branches of spin-polarized and current
carrying one-dimensional bound states. We identify the components of magnetic
scattering that lead to the bound states. The velocity, and hence spin texture,
of each of those branches can be independently tuned by a magnetic field
rotated in the plane of the surface. We compute the local net and spin-resolved
density of states as well as spin accumulation and charge currents. The net
spin polarization and current due to both bound and scattering states vary
stepwise as a function of the electrostatic and magnetic components of the
scattering potential, and can be tuned by an applied field. We discuss
stability of the bound states with respect to impurity scattering.
Understanding how dislocation structures vary with grain boundary (GB)
characters enables accurate controls of interfacial nano-patterns. In this
atomistic study, we report the structure-property correlations of Si (001)
small angle mixed grain boundaries (SAMGBs) under three macroscopic GB
characters (tilt character, twist character, and an implicit rotation character
between them). Firstly, the SAMGB energies are computed as a function of tilt
angle, twist angle and rotation angle, based on which a revised Read-Shockley
relationship capable of precisely describing the energy variations span the
three-dimensional GB character space is fitted. Secondly, GB structural
transitions from dislocation to amorphous structures are given as a function of
tilt angle, twist angle and dislocation core radii. The proportion, topology
and structural signatures of different SAMGB types defined from the ratio
between the tilt and twist angles are also presented. Thirdly, by extracting
the transformation of metastable SAMGB phases, the formation mechanisms of
SAMGB structures are characterized as energetically favorable dislocation glide
and reaction, from which the dislocation density function is derived. The
relevant results about SAMGB energies and structures are validated and
supported by theoretical calculations and experimental observations,
respectively.
We calculate the charge and heat currents carried by electrons, originating
from a temperature gradient and a chemical potential difference between the two
ends of tubular nanowires with different geometries of the cross-sectional
areas: circular, square, triangular, and hexagonal. We consider nanowires based
on InAs semiconductor material, and use the Landauer-B\"{u}ttiker approach to
calculate the transport quantities. We include impurities in the form of delta
scatterers and compare their effect for different geometries. The results
depend on the quantum localization of the electrons along the edges of the
tubular prismatic shell. For example, the effect of impurities on the charge
and heat transport is weaker in the triangular shell than in the hexagonal
shell, and the thermoelectric current in the triangular case is several times
larger than in the hexagonal case, for the same temperature gradient.
The effects of an electric field on the flow patterns and defect dynamics of
two-dimensional active nematics are numerically investigated. We found that
field-induced director reorientation causes anisotropic active turbulence
characterized by enhanced flow perpendicular to the electric field. The average
flow speed and its anisotropy are maximized at an intermediate field strength.
Topological defects in the anisotropic active turbulence are localized and show
characteristic dynamics {with simultaneous creation of} two pairs of defects. A
laning state characterized by stripe domains with alternating flow directions
is found at a larger field strength near the transition to the uniformly
aligned state. We obtained periodic oscillations between the laning state and
active turbulence, which resembles an experimental observation of active
nematics subject to anisotropic friction.
Due to their high photovoltaic efficiency and low-cost synthesis, lead halide
perovskites have attracted wide interest for application in new solar cell
technologies. The most stable and efficient ABX$_3$ perovskite solar cells
employ mixed A-site cations, however the impact of cation mixing on carrier
trapping and recombination -- key processes that limit photovoltaic performance
-- is not fully understood. Here we analyse non-radiative carrier trapping in
the mixed A-cation hybrid halide perovskite MA$_{1-x}$Cs$_x$PbI$_3$. By using
rigorous first-principles simulations we show that cation mixing leads to a
hole trapping rate at the iodine interstitial that is eight orders of magnitude
greater than in the single cation system. We demonstrate that the same defect
in the same material can display a wide variety of defect activity -- from
electrically inactive to recombination centre -- and, in doing so, resolve
conflicting reports in the literature. Finally, we propose a new mechanism in
which steric effects can be used to determine the rate of carrier trapping;
this is achieved by controlling the phase and dynamical response of the lattice
through the A-site composition. Our findings elucidate crucial links between
chemical composition, defect activity and optoelectronic performance, and
suggest a general approach that can help to rationalise the development of new
crystalline materials with target defect properties.
A general strategy of alternated slide construction to craft topological
metals is proposed, where there is a relative slide between the odd and even
chains in the trivial spinless quantum wire array. Firstly, taking the
three-leg ladder as an example, we find that alternated slide can induce a
topological phase transition from the normal metal to topological metal phases,
which are protected by inversion symmetry. Remarkably, topological metal
without nontrivial edge states is found, and the bulk-boundary correspondence
breaks down. Secondly, the two-dimensional quantum wire arrays with alternated
slide manifests similar physical behaviors. Two types of topological metal
phases emerge, where there are gapless bulk bands with and without nontrivial
edge states. These results could be confirmed by current experimental
techniques.
We investigate the dependence of the photogalvanic response of a multi-Weyl
semimetal on its topological charge, tilt, and chemical potential. We derive
analytical expressions for the shift and injection conductivities for tilted
charge-$n$ Weyl points $(n=1,2,3)$ using a low energy two-band effective
Hamiltonian. For double-Weyl semimetals, we also compute the response from
two-band and four-band tight-binding models with broken time-reversal symmetry
to study the effect of band bending and the contributions from higher bands. We
find a significant deviation in the responses obtained from the effective
low-energy continuum model and more realistic four-band continuum and
tight-binding models. We analyze several different limits of these models. We
describe the nature of the deviations and provide estimates of their dependence
on the frequency and other model parameters. Our analysis provides a simple
explanation for the first-principle calculation based frequency dependence of
the injection current in SrSi$_2$. Additionally, we find interesting parameter
regimes where the frequency dependence of the non-linear optical response can
be directly used to probe the type-I/type-II nature of the Weyl cone. We obtain
analytical results for the charge-4 Weyl semimetal by reducing the original
problem involving a triple $k$-space integral to one with only a double
integral. This simplification allows us to extract all relevant information
about the nature of its second-order dc response and the precise condition for
observing circular photogalvanic effect quantization. The semi-analytical
approach presented here can also be extended to a systematic study of second
harmonic generation and first-order optical conductivity in charge-4 Weyl
semimetals.
Bright excitons in ferromagnetic monolayers CrI$_3$ efficiently interact with
lattice magnetization, which makes possible all-optical resonant magnetization
control in this material. Using the combination of ab-initio simulations within
Bethe-Salpeter approach, semiconductor Bloch equations and Landau-Lifshitz
equations, we construct a microscopic theory of this effect. Solving
numerically the resulting system of the coupled equations describing the
dynamics of atomic spins and spins of the excitons, we demonstrate the
possibility of a tunable control of macroscopic magnetization of a sample.
We discuss a two-parameter renormalization group (RG) flow when parameters
are organized in a single complex variable, $\tau$, with modular properties.
Throughout the work we consider a special limit when the imaginary part of
$\tau$ characterizing the disorder strength tends to zero. We argue that
generalized Riemann-Thomae (gRT) function and the corresponding generalized
Devil's staircase emerge naturally in a variety of physical models providing a
universal behavior. In 1D we study the Anderson-like probe hopping in a weakly
disordered lattice, recognize the origin of the gRT function in the spectral
density of the probe and formulate specific RG procedure which gets mapped onto
the discrete flow in the fundamental domain of the modular group $SL(2,Z)$. In
2D we consider the generalization of the phyllotaxis crystal model proposed by
L. Levitov and suggest the explicit form of the effective potential for the
probe particle propagating in the symmetric and asymmetric 2D lattice of
defects. Analyzing the structure of RG flow equations in the vicinity of saddle
points we claim emergence of BKT-like transitions at ${\rm Im}\,\tau\to 0$. We
show that the RG-like dynamics in the fundamental domain of $SL(2,Z)$ for
asymmetric lattices asymptotically approaches various ``metallic ratios''
(among which the ``Silver ratio'' is one of the examples). For a Hubbard model
of particles on a ring interacting with long-ranged potentials we investigate
the dependence of the ground state energy on the potential and demonstrate by
combining numerical and analytical tools the emergence of the generalized
Devil's staircase. Also we conjecture a bridge between a Hubbard model and a
phyllotaxis.
Studies of the structural, electronic, and optical characteristics of the
interfaces between graphene and ZnO polar surfaces is carried out using
first-principles simulations. At the interface, a strong van der Waals force is
present, and because of the different work functions of graphene and ZnO,
charge transfer takes place. Graphene's superior conductivity is not impacted
by its interaction with ZnO, since its Dirac point is unaffected despite its
adsorption on ZnO. In hybrid systems, excited electrons with energies between 0
and 3 eV (above Fermi energy) are primarily accumulated on graphene. The
calculations offer a theoretical justification for the successful operation of
graphene / ZnO hybrid materials as photocatalysts and solar cells. ZnO
semiconductor is found to be a suitable material with modest band gap, ($\sim$
3 eV), having high transparency in visible region and a high optical
conductivity.

Date of feed: Tue, 23 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]+) **Foldy-Wouthuysen transformation and multiwave states of a graphene electron in external fields and free (2+1)-space. (arXiv:2305.11879v1 [cond-mat.mes-hall])**

Alexander J. Silenko

**Mechanical, Optical and Thermoelectric Properties of Janus BiTeCl Monolayer. (arXiv:2305.11922v1 [cond-mat.mtrl-sci])**

Poonam Chauhan, Jaspreet Singh, Ashok Kumar

**Two-Dimensional $\beta$-PdX$_2$ (X = S, Te) Monolayers for Efficient Solar Energy Conversion Applications. (arXiv:2305.11924v1 [cond-mat.mtrl-sci])**

Mukesh Jakhar, Ashok Kumar

**Fate of multipolar physics in $5d^2$ double perovskites. (arXiv:2305.11939v1 [cond-mat.str-el])**

Ahmed Rayyan, Xiaoyu Liu, Hae-Young Kee

**The 4D Camera: an 87 kHz direct electron detector for scanning/transmission electron microscopy. (arXiv:2305.11961v1 [physics.ins-det])**

Peter Ercius, Ian J. Johnson, Philipp Pelz, Benjamin H. Savitzky, Lauren Hughes, Hamish G. Brown, Steven E. Zeltmann, Shang-Lin Hsu, Cassio C.S. Pedroso, Bruce E. Cohen, Ramamoorthy Ramesh, David Paul, John M. Joseph, Thorsten Stezelberger, Cory Czarnik, Matthew Lent, Erin Fong, Jim Ciston, Mary C. Scott, Colin Ophus, Andrew M. Minor, and Peter Denes

**Floquet-Driven Indirect Exchange Interaction Mediated by Topological Insulator Surface States. (arXiv:2305.11963v1 [cond-mat.mes-hall])**

Modi Ke, Mahmoud M. Asmar, Wang-Kong Tse

**Nanopore creation in graphene at the nanoscale for water desalination. (arXiv:2305.11970v1 [cond-mat.mes-hall])**

Sidi Abdelmajid Ait Abdelkader, Ismail Benabdallah, Mohammed Amlieh, Abdelouahad El Fatimy

**Topological Kinetic Crossover in a Nanomagnet Array. (arXiv:2305.11973v1 [cond-mat.mes-hall])**

Xiaoyu Zhang, Grant Fitez, Shayaan Subzwari, Nicholas S. Bingham, Ioan-Augustin Chioar, Hilal Saglam, Justin Ramberger, Chris Leighton, Cristiano Nisoli, Peter Schiffer

**Cooperative rheological state-switching of enzymatically-driven composites of circular DNA and dextran. (arXiv:2305.11987v1 [cond-mat.soft])**

Juexin Marfai, Ryan J. McGorty, Rae M. Robertson-Anderson

**Even spheres as joint spectra of matrix models. (arXiv:2305.12026v1 [math.OA])**

Alexander Cerjan, Terry A. Loring

**Determining the upper critical magnetic field for N-doped lutetium hydride directly from the source data files in Dasenbrock-Gammon et al., Nature $\underline{615}$, 244 (2023). (arXiv:2305.12065v1 [cond-mat.supr-con])**

Dale R. Harshman, Anthony T. Fiory

**Probing the Magnetic State of a Kitaev Material with Graphene. (arXiv:2305.12116v1 [cond-mat.str-el])**

Jingtian Shi, A.H. MacDonald

**Non-Abelian physics in light and sound. (arXiv:2305.12206v1 [physics.optics])**

Yi Yang, Biao Yang, Guancong Ma, Jensen Li, Shuang Zhang, C. T. Chan

**Ba9RE2(SiO4)6 (RE=Ho-Yb): A New Family of Rare-earth based Honeycomb Lattice Magnets. (arXiv:2305.12214v1 [cond-mat.str-el])**

Andi Liu, Fangyuan Song, Zhaohu Li, Malik Ashtar, Yuqi Qin, Dingjun Liu, Zhengcai Xia, Jingxin Li, Zhitao Zhang, Wei Tong, Hanjie Guo, Zhaoming Tian

**Magnetostriction-driven muon localisation in an antiferromagnetic oxide. (arXiv:2305.12237v1 [cond-mat.str-el])**

Pietro Bonfà, Ifeanyi John Onuorah, Franz Lang, Iurii Timrov, Lorenzo Monacelli, Chennan Wang, Xiao Sun, Oleg Petracic, Giovanni Pizzi, Nicola Marzari, Stephen J. Blundell, Roberto De Renzi

**Exsolution of oxygen impurity from diamond lattice and formation of pressurized CO2-I precipitates. (arXiv:2305.12243v1 [cond-mat.mtrl-sci])**

Andrei A. Shiryaev, Yurii Chesnokov, Alexander L. Vasiliev, Thomas Hainschwang

**Healing of a Topological Scar: Coordination Defects in a Honeycomb Lattice. (arXiv:2305.12246v1 [cond-mat.mtrl-sci])**

Benjamin Katz, Vincent Crespi

**Candidate local parent Hamiltonian for 3/7 fractional quantum Hall effect. (arXiv:2305.12400v1 [cond-mat.str-el])**

Koji Kudo, A. Sharma, G. J. Sreejith, J. K. Jain

**Collective excitations in chiral Stoner magnets. (arXiv:2305.12508v1 [cond-mat.mes-hall])**

Zhiyu Dong, Olumakinde Ogunnaike, Leonid Levitov

**Active dislocations and topological traps govern dynamics of spiraling filamentous cyanobacteria. (arXiv:2305.12572v1 [cond-mat.soft])**

Xingting Gong, Manu Prakash

**Helical boundary modes from synthetic spin in a plasmonic lattice. (arXiv:2305.12609v1 [cond-mat.mes-hall])**

Sang Hyun Park, Michael Sammon, Eugene Mele, Tony Low

**Growth of self-integrated atomic quantum wires and junctions of a Mott semiconductor. (arXiv:2305.12700v1 [cond-mat.mes-hall])**

Tomoya Asaba, Lang Peng, Takahiro Ono, Satoru Akutagawa, Ibuki Tanaka, Hinako Murayama, Shota Suetsugu, Aleksandar Razpopov, Yuichi Kasahara, Takahito Terashima, Yuhki Kohsaka, Takasada Shibauchi, Masatoshi Ichikawa, Roser Valentí, Shin-ichi Sasa, Yuji Matsuda

**Enhancement of density of states and suppression of superconductivity in site-disordered topological metal LaPtSi. (arXiv:2305.12721v1 [cond-mat.supr-con])**

Sitaram Ramakrishnan, Tatsuya Yamakawa, Ryohei Oishi, Yasuyuki Shimura, Takahiro Onimaru, Arumugam Thamizhavel, Srinivasan Ramakrishnan, Minoru Nohara

**Promoted Electronic Coupling of Acoustic Phonon Modes in Doped Semimetallic MoTe2. (arXiv:2305.12762v1 [cond-mat.supr-con])**

Xiangyue Cui, Hejin Yan, Xuefei Yan, Kun Zhou, Yongqing Cai

**Partial Hydrogenation of N-heteropentacene: Impact on molecular packing and electronic structure. (arXiv:2305.12791v1 [cond-mat.mtrl-sci])**

Yutaro Ono, Ryohei Tsuruta, Tomohiro Nobeyama, Kazuki Matsui, Masahiro Sasaki, Makoto Tadokoro, Yasuo Nakayama, Yoichi Yamada

**Thin Pyramidal Cones in Nematic Liquid Crystal. (arXiv:2305.12797v1 [cond-mat.soft])**

Seyed Reza Seyednejad, Saeedeh Shoarinejad, Mohammad Reza Mozaffari, Faezeh Amini Joneghani

**Twirling and spontaneous symmetry breaking of domain wall networks in lattice-reconstructed heterostructures of 2D materials. (arXiv:2305.12848v1 [cond-mat.mes-hall])**

M.A. Kaliteevsky, V.V. Enaldiev, V.I. Fal'ko

**Skyrmions and antiskyrmions in monoaxial chiral magnets. (arXiv:2305.13003v1 [cond-mat.mes-hall])**

Vladyslav M. Kuchkin, Nikolai S. Kiselev

**Lifetime of coexisting sub-10 nm zero-field skyrmions and antiskyrmions. (arXiv:2305.13018v1 [cond-mat.mtrl-sci])**

Moritz A. Goerzen, Stephan von Malottki, Sebastian Meyer, Pavel F. Bessarab, Stefan Heinze

**Enhanced piezoelectric response at nanoscale vortex structures in ferroelectrics. (arXiv:2305.13096v1 [cond-mat.mtrl-sci])**

Xiaowen Shi, Nimish Prashant Nazirkar, Ravi Kashikar, Dmitry Karpov, Shola Folarin, Zachary Barringer, Skye Williams, Boris Kiefer, Ross Harder, Wonsuk Cha, Ruihao Yuan, Zhen Liu, Dezhen Xue, Turab Lookman, Inna Ponomareva, Edwin Fohtung

**Localization of chiral edge states by the non-Hermitian skin effect. (arXiv:2305.13139v1 [cond-mat.mes-hall])**

Gui-Geng Liu, Subhaskar Mandal, Peiheng Zhou, Xiang Xi, Rimi Banerjee, Yuan-Hang Hu, Minggui Wei, Maoren Wang, Qiang Wang, Zhen Gao, Hongsheng Chen, Yihao Yang, Yidong Chong, Baile Zhang

**Multi-scale lattice relaxation in chiral twisted trilayer graphenes. (arXiv:2305.13155v1 [cond-mat.mes-hall])**

Naoto Nakatsuji, Takuto Kawakami, Mikito Koshino

**Vortex condensate and critical exponents in the $(2+1)$-dimensional $\mathrm{O}(2)$ model. (arXiv:2305.13156v1 [cond-mat.stat-mech])**

A. Mariani

**Submolecular-scale control of phototautomerization. (arXiv:2305.13157v1 [cond-mat.mes-hall])**

Anna Rosławska, Katharina Kaiser, Michelangelo Romeo, Eloïse Devaux, Fabrice Scheurer, Stéphane Berciaud, Tomáš Neuman, Guillaume Schull

**Observation of Quantum metric and non-Hermitian Berry curvature in a plasmonic lattice. (arXiv:2305.13174v1 [physics.optics])**

Javier Cuerda, Jani M. Taskinen, Nicki Källman, Leo Grabitz, Päivi Törmä

**Gibbs free energies via isobaric-isothermal flows. (arXiv:2305.13233v1 [physics.comp-ph])**

Peter Wirnsberger, Borja Ibarz, George Papamakarios

**Entanglement Spectrum as a diagnostic of chirality of Topological Spin Liquids: Analysis of an $\mathrm{SU}(3)$ PEPS. (arXiv:2305.13240v1 [cond-mat.str-el])**

Mark J. Arildsen, Ji-Yao Chen, Norbert Schuch, Andreas W. W. Ludwig

**Pseudospin-orbit coupling and non-Hermitian effects in the Quantum Geometric Tensor of a plasmonic lattice. (arXiv:2305.13244v1 [physics.optics])**

Javier Cuerda, Jani M. Taskinen, Nicki Källman, Leo Grabitz, Päivi Törmä

**Scaling laws for planetary sediment transport from DEM-RANS numerical simulations. (arXiv:2203.00562v4 [astro-ph.EP] UPDATED)**

Thomas Pähtz, Orencio Duŕan

**Observation of Fermi arcs and Weyl nodes in a non-centrosymmetric magnetic Weyl semimetal. (arXiv:2203.05440v2 [cond-mat.mes-hall] UPDATED)**

Anup Pradhan Sakhya, Cheng-Yi Huang, Gyanendra Dhakal, Xue-Jian Gao, Sabin Regmi, Baokai Wang, Wei Wen, R. -H. He, Xiaohan Yao, Robert Smith, Milo Sprague, Shunye Gao, Bahadur Singh, Hsin Lin, Su-Yang Xu, Fazel Tafti, Arun Bansil, Madhab Neupane

**Complex electronic structure evolution of NdSb across the magnetic transition. (arXiv:2203.05879v2 [cond-mat.mtrl-sci] UPDATED)**

Anup Pradhan Sakhya, Baokai Wang, Firoza Kabir, Cheng-Yi Huang, M. Mofazzel Hosen, Bahadur Singh, Sabin Regmi, Gyanendra Dhakal, Klauss Dimitri, Milo Sprague, Robert Smith, Eric D. Bauer, Filip Ronning, Arun Bansil, Madhab Neupane

**Twisted-bilayer FeSe and the Fe-based superlattices. (arXiv:2208.11142v3 [cond-mat.str-el] UPDATED)**

P. Myles Eugenio, Oskar Vafek

**Probing enhanced electron-phonon coupling in graphene by infrared resonance Raman spectroscopy. (arXiv:2212.01342v2 [cond-mat.mes-hall] UPDATED)**

Tommaso Venanzi, Lorenzo Graziotto, Francesco Macheda, Simone Sotgiu, Taoufiq Ouaj, Elena Stellino, Claudia Fasolato, Paolo Postorino, Vaidotas Mišeikis, Marvin Metzelaars, Paul Kögerler, Bernd Beschoten, Camilla Coletti, Stefano Roddaro, Matteo Calandra, Michele Ortolani, Christoph Stampfer, Francesco Mauri, Leonetta Baldassarre

**Bound states and controllable currents on Topological Insulator surfaces with extended magnetic defects. (arXiv:2212.04052v2 [cond-mat.mes-hall] UPDATED)**

Eklavya Thareja, Ilya Vekhter

**Structures and energies of computed silicon (001) small angle mixed grain boundaries as a function of three macroscopic characters. (arXiv:2212.14611v3 [cond-mat.mtrl-sci] UPDATED)**

Wei Wan, Changxin Tang

**Effect of Impurities on Charge and Heat Transport in Tubular Nanowires. (arXiv:2302.02164v2 [cond-mat.mes-hall] UPDATED)**

Hadi Rezaie Heris, Kristjan Ottar Klausen, Anna Sitek, Sigurdur Ingi Erlingsson, Andrei Manolescu

**Flow patterns and defect dynamics of active nematics under an electric field. (arXiv:2302.08355v3 [cond-mat.soft] UPDATED)**

Yutaka Kinoshita, Nariya Uchida

**Steric engineering of point defects in lead halide perovskites. (arXiv:2302.08412v2 [cond-mat.mtrl-sci] UPDATED)**

Lucy D. Whalley

**Topological metals constructed by sliding quantum wire arrays. (arXiv:2303.01990v2 [cond-mat.mes-hall] UPDATED)**

Zheng-Wei Zuo, Linxi Lv, Dawei Kang

**Photogalvanic response in multi-Weyl semimetals. (arXiv:2303.12836v2 [cond-mat.mes-hall] UPDATED)**

Arpit Raj, Swati Chaudhary, Gregory A. Fiete

**All-optical magnetization control in CrI$_3$ monolayers: a microscopic theory. (arXiv:2304.00331v2 [cond-mat.mes-hall] UPDATED)**

A. Kudlis, M. Kazemi, Y. Zhumagulov, H. Schrautzer, P. F. Bessarab, I. V. Iorsh, I. A. Shelykh

**Generalized Devil's staircase and RG flows. (arXiv:2304.07640v2 [cond-mat.stat-mech] UPDATED)**

Ana Flack, Alexander Gorsky, Sergei Nechaev

**Study of novel properties of graphene-ZnO heterojunction interface using density functional theory. (arXiv:2305.02798v2 [cond-mat.mtrl-sci] UPDATED)**

H.D. Etea, K.N. Nigussa

Found 7 papers in prb We have calculated thermodynamic properties of four bcc refractory elements—V, Ta, Mo, and W—up to the melting point with full density-functional-theory accuracy, using the recently developed direct-upsampling method [J. H. Jung Epitaxial ${\mathrm{PbZrO}}_{3}/{\mathrm{SrRuO}}_{3}/{\mathrm{SrTiO}}_{3}$ heterostructures are among the most widely studied thin-film antiferroelectrics. This paper explores their temperature-induced phase transitions and the characteristics of the domain structure by means of high-resolution sync… This study investigates the mechanisms driving optical activity and quantum transport in twisted bilayer graphene systems. We demonstrate that optical activity results from spatial dispersion, making it inadequate to consider the system purely two-dimensional. Therefore, we utilize the transfer matr… A general strategy of alternated slide construction to craft topological metals is proposed, where there is a relative slide between the odd and even chains in the trivial spinless quantum wire array. Firstly, taking the three-leg ladder as an example, we find that alternated slide can induce a topo… The hierarchical equations of motion (HEOM) approach is an accurate method to simulate open system quantum dynamics, which allows for systematic convergence to numerically exact results. To represent effects of the bath, the reservoir correlation functions are usually decomposed into summation of mu… We report In 2010, the quantum anomalous Hall effect (QAHE) in graphene was proposed in the presence of Rashba spin-orbit coupling and a ferromagnetic exchange field. After a decade of experimental exploration, the anomalous Hall conductance can only reach about 0.25 in units of $2{e}^{2}/h$, which was attrib…

Date of feed: Tue, 23 May 2023 03:17:14 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]+) **Thermodynamic properties on the homologous temperature scale from direct upsampling: Understanding electron-vibration coupling and thermal vacancies in bcc refractory metals**

Axel Forslund, Jong Hyun Jung, Prashanth Srinivasan, and Blazej Grabowski

Author(s): Axel Forslund, Jong Hyun Jung, Prashanth Srinivasan, and Blazej Grabowski*et al.*, npj Comput. Mater. **9**, 3 (2023)]. The direct-upsampling methodo…

[Phys. Rev. B 107, 174309] Published Mon May 22, 2023

**Highly mismatched antiferroelectric films: Transition order and mechanical state**

Maria A. Kniazeva, Alexander E. Ganzha, Ran Gao, Arvind Dasgupta, Alexey V. Filimonov, and Roman G. Burkovsky

Author(s): Maria A. Kniazeva, Alexander E. Ganzha, Ran Gao, Arvind Dasgupta, Alexey V. Filimonov, and Roman G. Burkovsky

[Phys. Rev. B 107, 184113] Published Mon May 22, 2023

**Optical activity and transport in twisted bilayer graphene: Spatial dispersion effects**

S. Ta Ho and V. Nam Do

Author(s): S. Ta Ho and V. Nam Do

[Phys. Rev. B 107, 195141] Published Mon May 22, 2023

**Topological metals constructed by sliding quantum wire arrays**

Zheng-Wei Zuo, Linxi Lv, and Dawei Kang

Author(s): Zheng-Wei Zuo, Linxi Lv, and Dawei Kang

[Phys. Rev. B 107, 195142] Published Mon May 22, 2023

**Efficient low-temperature simulations for fermionic reservoirs with the hierarchical equations of motion method: Application to the Anderson impurity model**

Xiaohan Dan, Meng Xu, J. T. Stockburger, J. Ankerhold, and Qiang Shi

Author(s): Xiaohan Dan, Meng Xu, J. T. Stockburger, J. Ankerhold, and Qiang Shi

[Phys. Rev. B 107, 195429] Published Mon May 22, 2023

**Pressure-induced topological crystalline insulating phase in ${\mathrm{TlBiSe}}_{2}$: Experiments and theory**

V. Rajaji, Raagya Arora, B. Joseph, Subhajit Roychowdhury, Umesh V. Waghmare, Kanishka Biswas, and Chandrabhas Narayana

Author(s): V. Rajaji, Raagya Arora, B. Joseph, Subhajit Roychowdhury, Umesh V. Waghmare, Kanishka Biswas, and Chandrabhas Narayana*in situ* high-pressure studies on three-dimensional topological insulator ${\mathrm{TlBiSe}}_{2}$ using Raman scattering and synchrotron x-ray-diffraction experiments corroborated with the first-principles theoretical calculations. The phonon modes of a rhombohedral phase of ${\mathrm{TlBiS…

[Phys. Rev. B 107, 205139] Published Mon May 22, 2023

**Large Rashba spin-orbit coupling and high-temperature quantum anomalous Hall effect in Re-intercalated $\text{graphene}/{\mathrm{CrI}}_{3}$ heterostructure**

Yulei Han, Zhi Yan, Zeyu Li, Xiaohong Xu, Zhenyu Zhang, Qian Niu, and Zhenhua Qiao

Author(s): Yulei Han, Zhi Yan, Zeyu Li, Xiaohong Xu, Zhenyu Zhang, Qian Niu, and Zhenhua Qiao

[Phys. Rev. B 107, 205412] Published Mon May 22, 2023

Found 1 papers in prl A quantum repeater based on trapped ions allows the transmission of entangled, telecom-wavelength photons over 50 km.

Date of feed: Tue, 23 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]+) **Telecom-Wavelength Quantum Repeater Node Based on a Trapped-Ion Processor**

V. Krutyanskiy, M. Canteri, M. Meraner, J. Bate, V. Krcmarsky, J. Schupp, N. Sangouard, and B. P. Lanyon

Author(s): V. Krutyanskiy, M. Canteri, M. Meraner, J. Bate, V. Krcmarsky, J. Schupp, N. Sangouard, and B. P. Lanyon

[Phys. Rev. Lett. 130, 213601] Published Mon May 22, 2023

Found 1 papers in pr_res Topological phase transitions are predicted to emerge at the broken-gap junction between technologically relevant materials, namely thin epitaxial films of GeSn alloys deposited on Si. Robust theoretical methods are employed to demonstrate how strain and electric fields can be utilized to dynamically reconfigure these Si-compatible heterostructures into a quantum spin Hall insulator.

Date of feed: Tue, 23 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]+) **Quantum spin Hall phase in GeSn heterostructures on silicon**

B. M. Ferrari, F. Marcantonio, F. Murphy-Armando, M. Virgilio, and F. Pezzoli

Author(s): B. M. Ferrari, F. Marcantonio, F. Murphy-Armando, M. Virgilio, and F. Pezzoli

[Phys. Rev. Research 5, L022035] Published Mon May 22, 2023

Found 2 papers in nano-lett

Date of feed: Mon, 22 May 2023 20:31:38 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] Novel Topological Motifs and Superconductivity in Li-Cs System**

Hong-Mei Huang, Qiang Zhu, Vladislav A. Blatov, Artem R. Oganov, Xiaoting Wei, Peng Jiang, and Yan-Ling LiNano LettersDOI: 10.1021/acs.nanolett.3c00875

**[ASAP] A Graphene-Based Straintronic Physically Unclonable Function**

Subir Ghosh, Yikai Zheng, Shiva Subbulakshmi Radhakrishnan, Thomas F Schranghamer, and Saptarshi DasNano LettersDOI: 10.1021/acs.nanolett.3c01145

Found 2 papers in nat-comm **Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+) **Robust microscale structural superlubricity between graphite and nanostructured surface**

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**Anion redox as a means to derive layered manganese oxychalcogenides with exotic intergrowth structures**

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