Found 26 papers in cond-mat We report laser-assisted photochemical graphitization of polyimides (PI) into
functional magnetic nanocomposites using laser irradiation of PI in the
presence of magnetite nanoparticles (MNP). PI Kapton sheets covered with MNP
were photochemically treated under ambient conditions using a picosecond pulsed
laser (1064nm) to obtain an electrically conductive material. Scanning electron
microscopy of the treated material revealed layered magnetic
nanoparticles/graphite nanocomposite structure (MNP/graphite). Four probe
conductivity measurements indicated that nanocomposite has an electrical
conductivity of 1550 S/m. Superconducting quantum interference device (SQUID)
magnetometer-based magnetic characterization of the treated material revealed
an anisotropic ferromagnetic response in the MNP/graphite nanocomposite
compared to the isotropic response of MNP. Raman spectroscopy of MNP/graphite
nanocomposite revealed a four-fold improvement in graphitization, suppression
in disorder, and decreased nitrogenous impurities compared to the graphitic
material obtained from laser treatment of just PI sheets. X-ray photoelectron
spectroscopy, x-ray diffraction, and energy-dispersive x-ray spectroscopy were
used to delineate the phase transformations of MNP during the formation of
MNP/graphite nanocomposite. Post-mortem characterization indicates a possible
photocatalytic effect of MNP during MNP/graphite nanocomposite formation. Under
laser irradiation, MNP transformed from the initial Fe3O4 phase to
{\gamma}-Fe2O3 and Fe5C2 phases and acted as nucleation spots to catalyze the
graphitization process of PI.
A layered rhombohedral polymorph of indium (III) triiodide is synthesized at
high pressure and temperature. The unit cell symmetry and approximate
dimensions are determined by single crystal X-ray diffraction. Its R-3 crystal
structure, with a = 7.217 {\AA}, and c = 20.476 {\AA}, is refined by the
Rietveld method on powder X-ray diffraction data. The crystal structure is
based on InI6 octahedra sharing edges to form honeycomb lattice layers, though
with considerable stacking variations. Different from ambient pressure InI3,
which has a monoclinic molecular structure and a light-yellow color, high
pressure InI3 is layered and has an orange color. The band gaps of both the
monoclinic and rhombohedral variants of InI3 are estimated from diffuse
reflectance measurements.
The catalytic sites of MoS$_{2}$ monolayers towards hydrogen evolution are
well known to be vacancies and edge-like defects. However, it is still very
challenging to control the position, size, and defective areas on the basal
plane of Mo$S_{2}$ monolayers by most of defect-engineering routes. In this
work, the fabrication of etched arrays on ultra-large supported and
free-standing MoS$_{2}$ monolayers using focused ion beam (FIB) is reported for
the first time. By tuning the Ga+ ion dose, it is possible to confine defects
near the etched edges or spread them over ultra-large areas on the basal plane.
The electrocatalytic activity of the arrays toward hydrogen evolution reaction
(HER) was measured by fabricating microelectrodes using a new method that
preserves the catalytic sites. We demonstrate that the overpotential can be
decreased up to 290 mV by assessing electrochemical activity only at the basal
plane. High-resolution transmission electron microscopy images obtained on FIB
patterned freestanding MoS$_{2}$ monolayers reveal the presence of amorphous
regions and X-ray photoelectron spectroscopy indicates sulfur excess in these
regions. Density-functional theory calculations provide identification of
catalytic defect sites. Our results demonstrate a new rational control of
amorphous-crystalline surface boundaries and future insight for defect
optimization in MoS$_{2}$ monolayers.
Altermagnetism, a new magnetic phase, has been theoretically proposed and
experimentally verified to be distinct from ferromagnetism and
antiferromagnetism. Although altermagnets have been found to possess many
exotic physical properties, the very limited availability of known
altermagnetic materials~(e.g., 14 confirmed materials) hinders the study of
such properties. Hence, discovering more types of altermagnetic materials is
crucial for a comprehensive understanding of altermagnetism and thus
facilitating new applications in the next generation information technologies,
e.g., storage devices and high-sensitivity sensors. Here, we report 25 new
altermagnetic materials that cover metals, semiconductors, and insulators,
discovered by an AI search engine unifying symmetry analysis, graph neural
network pre-training, optimal transport theory, and first-principles electronic
structure calculation. The wide range of electronic structural characteristics
reveals that various innovative physical properties manifest in these newly
discovered altermagnetic materials, e.g., anomalous Hall effect, anomalous Kerr
effect, and topological property. Noteworthy, we discovered 8 $i$-wave
altermagnetic materials for the first time. Overall, the AI search engine
performs much better than human experts and suggests a set of new altermagnetic
materials with unique properties, outlining its potential for accelerated
discovery of altermagnetic materials.
We investigate if and how the valence-bond-solid (VBS) state emerges in the
Hubbard model on the honeycomb lattice when the Peierls-type electron-lattice
coupling is introduced. We consider all possible lattice-distortion patterns
allowed for this lattice model for graphene which preserve the reflection
symmetry and determine the most stable configuration in the adiabatic limit by
using an unbiased quantum Monte Carlo method. The VBS phase with Kekul\'e
dimerization is found to appear as an intermediate phase between a semimetal
and an antiferromagnetic Mott insulator for a moderately rigid lattice. This
implies that the undistorted semimetallic graphene can be driven into the VBS
phase by applying strain, accompanied by the single-particle excitation gap
opening.
In the field of symmetry-protected topological phases, a common wisdom is
that the symmetries fix the topological classifications, but they alone cannot
determine whether a system is topologically trivial or not. Here, we show that
this is no longer true in cases where symmetries are projectively represented.
Particularly, the Zak phase, a topological invariant of a one-dimensional
system, can be entirely determined by the projective symmetry algebra (PSA). To
demonstrate this remarkable effect, we propose a minimal model, termed as flux
Su-Schrieffer-Heeger (SSH) model, where the bond dimerization in the original
SSH model is replaced by a flux dimerization. We present experimental
realization of our flux SSH model in an electric-circuit array, and our
predictions are directly confirmed by experimental measurement. Our work
refreshes the understanding of the relation between symmetry and topology,
opens up new avenues for exploring PSA determined topological phases, and
suggests flux dimerization as a novel approach for designing topological
crystals.
We study a stochastic process where an active particle, modeled by a
one-dimensional run-and-tumble particle, searches for a target with a finite
absorption strength in thermal environments. Solving the Fokker-Planck equation
for a uniform initial distribution, we analytically calculate the mean
searching time (MST), the time for the active particle to be finally absorbed,
and show that there exists an optimal self-propulsion velocity of the active
particle at which MST is minimized. As the diffusion constant increases, the
optimal velocity changes from a finite value to zero, which implies that a
purely diffusive Brownian motion outperforms an active motion in terms of
searching time. Depending on the absorption strength of the target, the
transition of the optimal velocity becomes either continuous or discontinuous,
which can be understood based on the Landau approach. In addition, we obtain
the phase diagram indicating the passive-efficient and the active-efficient
regions. Finally, the initial condition dependence of MST is presented in
limiting cases.
The scanning tunneling microscopy induced luminescence (STML) can be used to
probe the optical and electronic properties of molecules. Concerning the
vibronic coupling, we model the molecule as a two-level system with the
vibrational degrees of freedom. Based on the Bardeen's theory, we express the
inelastic tunneling current in terms of Huang-Rhys factor within the inelastic
electron scattering (IES) mechanism. We find that the differential conductance,
varying with the bias voltage, exhibits distinct step structure with various
vibronic coupling strength. The second derivative of the inelastic tunneling
current with respect to the bias voltage shows the characteristics of
vibrational-level structure with Franck-Condon factor. Consequently, we propose
a method to determine the Huang-Rhys factor of molecules, holding promising
potential within the realm of solid-state physics.
We investigate one- and two-photon absorption in twisted bilayer graphene
(TBLG) by examining the effects of tuning the twist angle $ \theta $ and the
excitation energy $ E_l $ on their corresponding absorption coefficients $
\alpha_{i=1,2}$. We find that $ \alpha_1 $ shows distinct peaks as a function
of $ E_l $ which correspond to the van Hove singularities (vHS) of TBLG. In
contrast to single- (SLG) and AB bilayer graphene (BLG), $ \alpha_1 $ is
substantially enhanced by $\sim 2$ and $\sim 1$ orders of magnitude,
respectively, in the visible range. On the other hand, $\alpha_2 $ exhibits a
remarkable increase of $\sim 11$ and $\sim 9$ orders of magnitude.
Interestingly, as $\theta$ increases, the resonant features exhibited by
$\alpha_{i=1,2}$ \textit{vs.} $ E_l $ shift progressively from the infrared to
the visible. On doping TBLG, both $\alpha_1 $ and $ \alpha_2 $ remain
essentially unchanged \textit{vs.} $ E_l $ but with a minor red-shift in their
resonant peaks. Additionally, we explore various polarization configurations
for TPA and determine the conditions under which $\alpha_2$ becomes extremal.
We introduce a method to enforce some symmetries starting from a trial
wave-function prepared on quantum computers that might not respect these
symmetries. The technique eliminates the necessity for performing the
projection on the quantum computer itself. Instead, this task is conducted as a
post-processing step on the system's "Classical Shadow". Illustrations of the
approach are given for the parity, particle number, and spin projectors that
are of particular interest in interacting many-body systems. We compare the
method with another classical post-processing technique based on direct
measurements of the quantum register. We show that the present scheme can be
competitive to predict observables on symmetry-restored states once
optimization through derandomization is employed. The technique is illustrated
through its application to compute the projected energy for the pairing model
Hamiltonian.
We investigate a non-Hermitian Aubry-Andre-Harper model, considering both the
short- and long-range p-wave pairing. Here, the non-Hermiticity is considered
at the onsite potential. A comprehensive analysis of several critical aspects
of this system, including the eigenspectra, localization properties, PT}
symmetry, real to complex transition, and topological properties, is conducted.
Specifically, we observe the emergence of Majorana zero modes in the case of
short-range pairing, whereas the massive Dirac modes emerge in the case of
long-range pairing. Notably, a triple-phase transition is identified, involving
simultaneous transitions from extended or metallic state to critical
multifractal state, unbroken to broken PT symmetry, and unconventional real to
complex energies. In addition, a double-phase transition is observed, where the
topological and superconducting transitions occur concurrently. These
intriguing double- and triple-phase transitions are observed in both short- and
long-range pairing cases.
Understanding the topological aspects of the band structure of solids has
fundamentally changed our appreciation of their properties. The layered, van
der Waals transition-metal pentatelluride ZrTe$_5$ has proven on numerous
occasions to be an excellent candidate for the study of controllable
topological phase transitions. Here, we investigate the topological phase
diagrams of monolayer and bilayer forms of ZrTe$_5$, under mechanical
deformations using \textit{ab initio} techniques. We find that mechanical
deformation can close the monolayer's topological gap, while the bilayer
exhibits richer phase diagram, including both topological insulating, trivial
metallic and insulating phases. The bilayer is predicted to be on the
topological phase boundary. We also address the preparation of monolayers,
using \emph{ab initio} simulations and experimental scanning tunneling
microscopy measurements. We confirm that while monolayer ZrTe$_5$ is difficult
to exfoliate without compromising its crystalline structure, bilayers offer a
more stable alternative, revealing the complexities and limitations of using
gold substrates for monolayer exfoliation.
We demonstrate a bistable optical trap by tightly focusing a vortex laser
beam. The optical potential has the form of a Mexican hat with an additional
minimum at the center. The bistable trapping corresponds to a non-equilibrium
steady state (NESS), where the microsphere continually hops, due to thermal
activation, between an axial equilibrium state and an orbital state driven by
the optical torque. We develop a theoretical model for the optical force field,
based entirely on experimentally accessible parameters, combining a Debye-type
non-paraxial description of the focused vortex beam with Mie scattering by the
microsphere. The theoretical prediction that the microsphere and the annular
laser focal spot should have comparable sizes is confirmed experimentally by
taking different values for the topological charge of the vortex beam.
Spherical aberration introduced by refraction at the interface between the
glass slide and the sample is taken into account and allows to fine tune
between axial, bistable and orbital states as the sample is shifted with
respect to the objective focal plane. We find an overall agreement between
theory and experiment for a rather broad range of topological charges. Our
results open the way for applications in stochastic thermodynamics as it
establishes a new control parameter, the height of the objective focal plane
with respect to the glass slide, that allows to shape the optical force field
in real time and in a controllable way.
The Schwinger model, one-dimensional quantum electrodynamics, has CP symmetry
at $\theta = \pi$ due to the topological nature of the $\theta$ term. At zero
temperature, it is known that as increasing the fermion mass, the system
undergoes a second-order phase transition to the CP broken phase, which belongs
to the same universality class as the quantum Ising chain. In this paper, we
explore the phase diagram near the quantum critical point (QCP) in the
temperature and fermion mass plane using first-principle Monte Carlo
simulations, while avoiding the sign problem by using the lattice formulation
of the bosonized Schwinger model. Specifically, we perform a detailed
investigation of the correlation function of the electric field near the QCP
and find that its asymptotic behavior can be described by the universal scaling
function of the quantum Ising chain. This finding indicates the existence of
three regions near the QCP, each characterized by a specific asymptotic form of
the correlation length, and demonstrates that the CP symmetry is restored at
any nonzero temperature, entirely analogous to the quantum Ising chain. The
range of the scaling behavior is also examined and found to be particularly
wide.
We develop a theory of the magnetostriction for metals with small
charge-carrier pockets of their Fermi surfaces. As an example, we consider LuAs
that has a cubic crystal structure. The theory quite well describes the known
experimental data on the magnetostriction of this metal. The obtained results
also clearly demonstrate that the dilatometry can be used for detecting tiny
Fermi-surface pockets that are not discerned by traditional methods based on
investigations of the Shubnikov--de Haas and de Haas--van Alphen effects.
Nematic liquid-crystal devices are a powerful tool to structure light in
different degrees of freedom, both in classical and quantum regimes. Most of
these devices exploit either the possibility of introducing a
position-dependent phase retardation with a homogeneous alignment of the optic
axis -- e.g., liquid-crystal-based spatial light modulators -- or conversely,
with a uniform but tunable retardation and patterned optic axis, e.g.,
$q$-plates. The pattern is the same in the latter case on the two alignment
layers. Here, a more general case is considered, wherein the front and back
alignment layers are patterned differently. This creates a non-symmetric device
which can exhibit different behaviours depending on the direction of beam
propagation and effective phase retardation. In particular, we fabricate
multi-$q$-plates by setting different topological charges on the two alignment
layers. The devices have been characterized by spatially resolved Stokes
polarimetry, with and without applied electric voltage, demonstrating new
functionalities.
We report the theoretical discovery of real-space multifold degenerate
Floquet-Bloch states in monolayer graphene coherently driven by twisted
circulalry-polarized light. Using Floquet theory, we characterize the
real-space structure of quasienergies and Floquet modes in terms of the orbital
angular momentum and radial vortex profile of light. We obtain the effective
real-space Floquet Hamiltonian and show it supports crossings of Floquet modes,
especially at high-symmetry $K$ and $\Gamma$ points of graphene, at specific
radial positions from the vortex center. At specific frequencies, the vortex
bound states form a multifold degenerate structure in real-space. This
structure is purely dynamically generated and controlled by the frequency and
intensity of twisted light. We discuss the experimental feasibility of
observing and employing the real-space multifold degeneracy for coherent
optoelectronic quantum state engineering.
Corundum oxide Ti$_2$O$_3$ shows the metal-insulator transition around
400-600 K accompanying the nearest Ti$^{3+}$-Ti$^{3+}$ bond ($a_{1g}a_{1g}$
singlet state) formation along the $c$ axis. In order to clarify the
hole-doping effect for the $a_{1g}a_{1g}$ singlet bond in Ti$_2$O$_3$, we
investigated Ti $3d$ orbital anisotropy between corundum-type Ti$_2$O$_3$ and
ilmenite-type MgTiO$_3$ using linear dichroism of soft x-ray absorption
spectroscopy of the Ti $L_{2,3}$ edge. From the linear dichroic spectral weight
in Mg$_y$Ti$_{2-y}$O$_3$, we confirmed that the $a_{1g}a_{1g}$ state is
dominant not only in $y=0.01$ (almost Ti$_2$O$_3$), but also in $y = 0.29$,
indicating that the Ti-Ti bond survives against a certain level of hole doping.
In $y=0.63$ corresponding to 46% hole doping per Ti, the $3d$ orbital symmetry
changes from $a_{1g}$ to $e_g^{\pi}$.
Graphene is a two-dimensional carbon material which exhibits exceptional
properties, making it highly suitable for a wide range of applications.
Practical graphene fabrication often yields a polycrystalline structure with
many inherent defects, which significantly influence its performance. In this
study, we utilize a Monte Carlo approach based on the optimized Wooten, Winer
and Weaire (WWW) algorithm to simulate the crystalline domain coarsening
process of polycrystalline graphene. Our sample configurations show excellent
agreement with experimental data. We conduct statistical analyses of the bond
and angle distribution, temporal evolution of the defect distribution, and
spatial correlation of the lattice orientation that follows a stretched
exponential distribution. Furthermore, we thoroughly investigate the diffusion
behavior of defects and find that the changes in domain size follow a power-law
distribution. We briefly discuss the possible connections of these results to
(and differences from) domain growth processes in other statistical models,
such as the Ising dynamics. We also examine the impact of buckling of
polycrystalline graphene on the crystallization rate under substrate effects.
Our findings may offer valuable guidance and insights for both theoretical
investigations and experimental advancements.
Over the past decade, cavity solitons have attracted substantial attention
for their rich dynamics and their myriad potential applications. Recently,
there has been growing interest in understanding cavity solitons in systems of
coupled resonators, where both new physics and applications can emerge. While
numerous works have theoretically studied the interplay between cavity solitons
and lattice topology, experimental demonstrations of cavity solitons in
topological lattices remain elusive. Here, we experimentally realize cavity
solitons in a Su-Schrieffer-Heeger (SSH) lattice and illustrate that the
synergy between topology and soliton formation dynamics can induce soliton
formation at the boundaries of a topological SSH lattice. Our work illustrates
the rich physics of cavity solitons in topological lattices and demonstrates a
flexible approach to study solitons in large-scale coupled resonator arrays.
Lately there are many SLAC fermion investigations on the (2+1)D Gross-Neveu
criticality of a single Dirac cone [1,2]. While the SLAC fermion construction
indeed gives rise to the linear energy-momentum relation for all lattice
momenta at the non-interacting limit, the long-range hopping and its consequent
violation of locality on the Gross-Neveu quantum critical point (GN-QCP) --
which a priori requires short-range interaction -- has not been verified. Here
we show, by means of large-scale quantum Monte Carlo simulations, that the
interaction-driven antiferromagnetic insulator in this case is fundamentally
different from that on a purely local $\pi$-flux Hubbard model on the square
lattice. In particular, we find the antiferromagnetic long-range order in the
SLAC fermion model has a finite temperature continuous phase transition, which
violates the Mermin-Wagner theorem, and smoothly connects to the previously
determined GN-QCP. The magnetic excitations inside the antiferromagnetic
insulator are gapped without Goldstone mode, even though the state
spontaneously breaks continuous $SU(2)$ symmetry. These unusual results
proclaim caution on the interpretation of the quantum phase transition in SLAC
fermion model as that of GN-QCP with short-range interaction.
Common proposals for realizing topological superconductivity and Majorana
zero modes in semiconductor-superconductor hybrids require large magnetic
fields, which paradoxically suppress the superconducting gap of the parent
superconductor. Although two-channel schemes have been proposed as a way to
eliminate magnetic fields, geometric constraints make their implementation
challenging, since the channels should be immersed in nearly antiparallel
electric fields. Here, we propose an experimentally favorable scheme for
realizing field-free topological superconductivity, in two-channel InAs-Al
nanowires, that overcomes such growth constraints. Crucially, we show that
antiparallel fields are not required, if the channels are energetically
detuned. We compute topological phase diagrams for realistically modeled
nanowires, finding a broad range of parameters that could potentially harbor
Majorana zero modes. This work, therefore, solves a major technical challenge
and opens the door to near-term experiments.
Twisted bilayer graphene (TBLG) subject to a sequence of commensurate
external periodic potentials reveals the formation of moir\'{e} fractals (MF)
that share striking similarities with the central place theory (CPT) of
economic geography, thus uncovering a remarkable connection between twistronics
and the geometry of economic zones. The MFs arise from the self-similarity of
the emergent hierarchy of Brillouin zones (BZ), forming a nested subband
structure within the bandwidth of the original moir\'{e} bands. The fractal
generators for TBLG under these external potentials are derived and we explore
their impact on the hierarchy of the BZ edges and the wavefunctions at the
Dirac point. By examining realistic super-moir\'{e} structures (SMS) and
demonstrating their equivalence to an MF with periodic perturbations under
specific conditions, we establish MFs as a general description for such
systems. Furthermore, we uncover parallels between the modification of the BZ
hierarchy and magnetic BZ formation in the Hofstadter butterfly problem,
allowing us to construct an incommensurability measure for MFs as a function of
the twist angle. The resulting band structure hierarchy bolsters correlation
effects, pushing more bands within the same energy window for both commensurate
and incommensurate TBLG.
In 1987, Liechtenstein et al. came up with the idea to formulate the problem
of interatomic exchange interactions, which would describe the energy change
caused by the infinitesimal rotations of spins, in terms of the magnetic
susceptibility. The formulation appears to be very generic and, for isotropic
systems, expresses the energy change in the form of the Heisenberg model,
irrespectively on which microscopic mechanism stands behind the interaction
parameters. Moreover, this approach establishes the relationship between the
exchange interactions and the electronic structure obtained, for instance, in
the first-principles calculations based on the density functional theory. The
purpose of this review is to elaborate basic ideas of the linear response
theories for the exchange interactions as well as more recent developments. The
special attention is paid to the approximations underlying the original method
of Liechtenstein et al. in comparison with its more recent and more rigorous
extensions, the roles of the on-site Coulomb interactions and the ligand
states, and calculations of antisymmetric Dzyaloshinskii-Moriya interactions,
which can be performed alongside with the isotropic exchange, within one
computational scheme. The abilities of the linear response theories as well as
many theoretical nuances, which may arise in the analysis of interatomic
exchange interactions, are illustrated on magnetic van der Walls materials
Cr$X_3$ ($X$$=$ Cl, I), half-metallic ferromagnet CrO$_2$, ferromagnetic Weyl
semimetal Co$_3$Sn$_2$S$_2$, and orthorhombic manganites $A$MnO$_3$ ($A$$=$ La,
Ho), known for the peculiar interplay of the lattice distortion, spin, and
orbital ordering.
The ability to manipulate electronic spin channels in 2D materials is crucial
for realizing next-generation spintronics. Spin filters are spintronic
components that polarize spins using external fields or material properties
like magnetism. Recently, topological protection from backscattering has
emerged as an enticing feature through which to enhance the robustness of 2D
spin filters. In this work, we propose and then characterize one of the first
2D topological spin filters: bilayer CrI3/1T'-WTe2 (BLCW). To do so, we use a
combination of DFT, maximally localized Wannier functions, and quantum
transport simulations to demonstrate that the BLCW satisfies the principal
criteria for being a topological spin filter; namely that it is gapless,
exhibits spin-polarized charge transfer (SPCT) from WTe2 to CrI3 that renders
the BLCW metallic, and has a topological boundary which retains the edge
conductance of monolayer (ML) 1T'-WTe2. We observe that the atomic magnetic
moments on Cr from DFT are approximately 3.2 mB/Cr in the BL compared to 2.9
mB/Cr with small negative ferromagnetic (FM) moments induced on the W atoms in
freestanding ML CrI3. Subtracting the charge/spin densities of the constituent
ML's from those of the BLCW further reveals SOC-enhanced SPCT from WTe2 to
CrI3. We find that the BLCW is topologically trivial by showing that its Chern
number is zero. Lastly, we show that interfacial scattering at the boundary
between the terraced materials does not remove WTe2's edge conductance. This
evidence indicates that BLCW is gapless, magnetic, and topologically trivial,
meaning that a terraced WTe2/CrI3 BL heterostructure in which only a portion of
a WTe2 ML is topped with CrI3 is a promising candidate for a 2D topological
spin filter. Our results further suggest that 1D chiral edge states may be
realized by stacking FM ML's, like CrI3, atop 2D nonmagnetic Weyl semimetals
like 1T'-WTe2.
New exact formulas are derived for systems involving Landau-Zener transition
rates and for absorption spectra in quantum dots. A number of novel physical
implications are explored in detail.

Date of feed: Thu, 09 Nov 2023 01:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Magnetic functionalization and Catalytic behavior of magnetic nanoparticles during laser photochemical graphitization of polyimide. (arXiv:2311.04264v1 [cond-mat.mtrl-sci])**

Abhishek Sarkar, Ho-won Noh, Ikenna Nlebedim, Prana Shrotriya

**The Pressure-Stabilized Polymorph of Indium Triiodide. (arXiv:2311.04332v1 [cond-mat.mtrl-sci])**

Danrui Ni, Haozhe Wang, Xianghan Xu, Weiwei Xie, Robert J. Cava

**Patterning edge-like defects and tuning defective areas on the basal plane of ultra-large MoS$_{2}$ monolayers toward hydrogen evolution reaction. (arXiv:2311.04413v1 [cond-mat.mtrl-sci])**

Bianca Rocha Florindo, Leonardo H. Hasimoto, Nicolli de Freitas, Graziâni Candiotto, Erika Nascimento Lima, Cláudia de Lourenço, Ana B. S. de Araujo, Carlos Ospina, Jefferson Bettini, Edson R. Leite, Renato S. Lima, Adalberto Fazzio, Rodrigo B. Capaz, Murilo Santhiago

**AI-accelerated Discovery of Altermagnetic Materials. (arXiv:2311.04418v1 [cond-mat.mtrl-sci])**

Ze-Feng Gao, Shuai Qu, Bocheng Zeng, Ji-Rong Wen, Hao Sun, Pengjie Guo, Zhong-Yi Lu

**Kekul\'e valence bond order in the Hubbard model on the honeycomb lattice with possible lattice distortions for graphene. (arXiv:2311.04469v1 [cond-mat.str-el])**

Yuichi Otsuka, Seiji Yunoki

**Projective symmetry determined topology in flux Su-Schrieffer-Heeger model. (arXiv:2311.04516v1 [cond-mat.mes-hall])**

Gang Jiang, Z. Y. Chen, S. J. Yue, W. B. Rui, Xiao-Ming Zhu, Shengyuan A. Yang, Y. X. Zhao

**Active search for a reactive target in thermal environments. (arXiv:2311.04539v1 [cond-mat.stat-mech])**

Byeong Guk Go, Euijin Jeon, Yong Woon Kim

**Determining the molecular Huang-Rhys factor via STM induced luminescence. (arXiv:2311.04543v1 [cond-mat.mes-hall])**

Fei Wen, Guohui Dong

**Photon absorption in twisted bilayer graphene. (arXiv:2311.04565v1 [cond-mat.mes-hall])**

Disha Arora, Deepanshu Aggarwal, Sankalpa Ghosh, Rohit Narula

**Restoring symmetries in quantum computing using Classical Shadows. (arXiv:2311.04571v1 [quant-ph])**

Edgar Andres Ruiz Guzman, Denis Lacroix

**Non-Hermitian Aubry-Andr\'e-Harper model with short- and long-range p-wave pairing. (arXiv:2311.04605v1 [cond-mat.dis-nn])**

Shaina Gandhi, Jayendra N. Bandyopadhyay

**Mechanical strain induced topological phase changes of few layer ZrTe$_5$. (arXiv:2311.04721v1 [cond-mat.mtrl-sci])**

Zoltán Tajkov, Konrád Kandrai, Dániel Nagy, Levente Tapasztó, János Koltai, Péter Nemes-Incze

**Tailoring bistability in optical tweezers with vortex beams and spherical aberration. (arXiv:2311.04737v1 [physics.optics])**

Arthur Luna da Fonseca, Kainã Diniz, Paula Borges Monteiro, Luís Barbosa Pires, Guilherme Tenório Moura, Mateus Borges, Rafael de Sousa Dutra, Diney Soares Ether Jr, Nathan Bessa Viana, Paulo Américo Maia Neto

**Phase diagram near the quantum critical point in Schwinger model at $\theta = \pi$: analogy with quantum Ising chain. (arXiv:2311.04738v1 [hep-lat])**

Hiroki Ohata

**Magnetostriction of metals with small Fermi-surface pockets: the case of the topologically trivial semimetal LuAs. (arXiv:2311.04768v1 [cond-mat.mtrl-sci])**

Yu. V. Sharlai, L. Bochenek, J. Juraszek, T. Cichorek, G. P. Mikitik

**Spatially twisted liquid-crystal devices. (arXiv:2311.04773v1 [physics.optics])**

Alicia Sit, Francesco Di Colandrea, Alessio D'Errico, Ebrahim Karimi

**Real-space multifold degeneracy in graphene irradiated by twisted light. (arXiv:2311.04792v1 [cond-mat.mes-hall])**

Suman Aich, Babak Seradjeh (IUB)

**Linear dichroic x-ray absorption response of Ti-Ti dimers along the $c$ axis in Ti$_2$O$_3$ upon Mg substitution. (arXiv:2311.04814v1 [cond-mat.str-el])**

M. Okawa, D. Takegami, D. S. Christovam, M. Ferreira-Carvalho, C.-Y. Kuo, C. T. Chen, T. Miyoshino, K. Takasu, T. Okuda, C. F. Chang, L. H. Tjeng, T. Mizokawa

**Domain coarsening in polycrystalline graphene. (arXiv:2311.04842v1 [cond-mat.dis-nn])**

Zihua Liu, Debabrata Panja, Gerard T. Barkema

**Cavity Soliton-Induced Topological Edge States. (arXiv:2311.04873v1 [physics.optics])**

Christian R. Leefmans, Nicolas Englebert, James Williams, Robert M. Gray, Nathan Goldman, Simon-Pierre Gorza, François Leo, Alireza Marandi

**Caution on Gross-Neveu criticality with a single Dirac cone: Violation of locality and its consequence of unexpected finite-temperature transition. (arXiv:2210.04272v2 [cond-mat.str-el] UPDATED)**

Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng, Yang Qi

**Realizing Majorana Kramers pairs in two-channel InAs-Al nanowires with highly misaligned electric fields. (arXiv:2304.07286v2 [cond-mat.mes-hall] UPDATED)**

Benjamin D Woods, Mark Friesen

**Moir\'e fractals in twisted graphene layers. (arXiv:2306.04580v2 [cond-mat.mes-hall] UPDATED)**

Deepanshu Aggarwal, Rohit Narula, Sankalpa Ghosh (IIT Delhi)

**Linear response theories for interatomic exchange interactions. (arXiv:2308.04799v3 [cond-mat.mtrl-sci] UPDATED)**

I. V. Solovyev

**A first-principles study of bilayer 1T'-WTe2/CrI3: A candidate topological spin filter. (arXiv:2308.06415v2 [cond-mat.mes-hall] UPDATED)**

Daniel Staros, Brenda Rubenstein, Panchapakesan Ganesh

**Landau-Zener transition rates of superconducting qubits and absorption spectrum in quantum dots. (arXiv:2310.13058v2 [quant-ph] UPDATED)**

Jorge G. Russo, Miguel Tierz

Found 7 papers in prb Cesium superoxide is magnetic, due to the half-occupied $\pi $ orbitals on its O${}_{2}^{-}$ molecules. Neutron diffraction experiments done here find that the crystal structure undergoes a sequence of transitions from tetragonal to incommensurate to orthorhombic, with the latter two exhibiting staggered displacements of the cesium ions. The symmetry of this structure permits antisymmetric exchange, which is consistent with a canted antiferromagnetic structure also observed, and a nice example of a structure-property relationship. The Kitaev honeycomb model, which is exactly solvable by virtue of an extensive number of conserved quantities, supports a gapless quantum spin liquid phase as well as gapped descendants relevant for fault-tolerant quantum computation. We show that the anomalous edge modes of one-dimensional (1D) cl… As the in-plane magnetized counterparts of skyrmions in two dimensions, magnetic bimerons are swirling topological spin textures consisting of two merons. Here we theoretically and numerically investigate the dynamics of a bimeron induced by the monochromatic spin wave in a ferromagnetic thin film. … We study the spin-orbit proximity effects in a hybrid heterostructure built from a one-dimensional (1D) armchair carbon nanotube and two-dimensional (2D) buckled monolayer bismuthene. We show, by performing first-principles calculations, that Dirac electrons in the nanotube exhibit large spin-orbit … Real space imaging using a scanning tunnelling microscope reveals the formation of an inhomogeneous vortex liquid state in few nanometer thick superconducting films that does not freeze into a crystal or a glass down to 0.41 $K$. Vortices in this two-dimensional liquid form a network of percolating paths, due to the combined effect of pinning and intervortex interaction. While some vortices remain static, others move on this network, with their relative fractions changing with magnetic field, temperature, and applied current. Motivated by recent discoveries of superconductivity in lightly doped multilayer graphene systems, we present a low-energy model to study superconductivity in two-dimensional materials whose Fermi surface consists of two valleys at $±\mathbit{K}$ points. We assume a triplet odd-valley superconductin… We discuss the link between the quasielectron wave functions proposed by Laughlin and by Jain and show both analytically and numerically that Laughlin's quasielectron is a nonlocal composite-fermion state. Composite-fermion states are typically discussed in terms of the composite-fermion Landau leve…

Date of feed: Thu, 09 Nov 2023 04:16:59 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) **Crystal and magnetic structure of cesium superoxide**

R. A. Ewings, M. Reehuis, F. Orlandi, P. Manuel, D. D. Khalyavin, A. S. Gibbs, A. D. Fortes, A. Hoser, A. J. Princep, and M. Jansen

Author(s): R. A. Ewings, M. Reehuis, F. Orlandi, P. Manuel, D. D. Khalyavin, A. S. Gibbs, A. D. Fortes, A. Hoser, A. J. Princep, and M. Jansen

[Phys. Rev. B 108, 174412] Published Wed Nov 08, 2023

**Assembling Kitaev honeycomb spin liquids from arrays of one-dimensional symmetry-protected topological phases**

Yue Liu, Nathanan Tantivasadakarn, Kevin Slagle, David F. Mross, and Jason Alicea

Author(s): Yue Liu, Nathanan Tantivasadakarn, Kevin Slagle, David F. Mross, and Jason Alicea

[Phys. Rev. B 108, 184406] Published Wed Nov 08, 2023

**Bidirectional magnon-driven bimeron motion in ferromagnets**

Xue Liang, Jin Lan, Guoping Zhao, Mateusz Zelent, Maciej Krawczyk, and Yan Zhou

Author(s): Xue Liang, Jin Lan, Guoping Zhao, Mateusz Zelent, Maciej Krawczyk, and Yan Zhou

[Phys. Rev. B 108, 184407] Published Wed Nov 08, 2023

**Proximity spin-orbit coupling in a small-diameter armchair carbon nanotube on monolayer bismuthene**

Marcin Kurpas

Author(s): Marcin Kurpas

[Phys. Rev. B 108, 195408] Published Wed Nov 08, 2023

**Structure and dynamics of a pinned vortex liquid in a superconducting $a\text{−}{\mathrm{Re}}_{6}\mathrm{Zr}$ thin film**

Rishabh Duhan, Subhamita Sengupta, Ruchi Tomar, Somak Basistha, Vivas Bagwe, Chandan Dasgupta, and Pratap Raychaudhuri

Author(s): Rishabh Duhan, Subhamita Sengupta, Ruchi Tomar, Somak Basistha, Vivas Bagwe, Chandan Dasgupta, and Pratap Raychaudhuri

[Phys. Rev. B 108, L180503] Published Wed Nov 08, 2023

**Spectroscopic signature of spin triplet odd-valley superconductivity in two-dimensional materials**

T. H. Kokkeler, Chunli Huang, F. S. Bergeret, and I. V. Tokatly

Author(s): T. H. Kokkeler, Chunli Huang, F. S. Bergeret, and I. V. Tokatly

[Phys. Rev. B 108, L180504] Published Wed Nov 08, 2023

**Laughlin's quasielectron as a nonlocal composite fermion**

Alberto Nardin and Leonardo Mazza

Author(s): Alberto Nardin and Leonardo Mazza

[Phys. Rev. B 108, L201106] Published Wed Nov 08, 2023

Found 1 papers in prl We argue that the chiral $\mathrm{U}(1{)}_{A}$ symmetry of a Weyl fermion cannot be implemented by a shallow depth quantum circuit operation in a fermionic lattice Hamiltonian model with finite dimensional onsite Hilbert spaces. We also extend this result to discrete ${\mathbb{Z}}_{2N}$ subgroups of…

Date of feed: Thu, 09 Nov 2023 04:17:02 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **A No-Go Result for Implementing Chiral Symmetries by Locality-Preserving Unitaries in a Three-Dimensional Hamiltonian Lattice Model of Fermions**

Lukasz Fidkowski and Cenke Xu

Author(s): Lukasz Fidkowski and Cenke Xu

[Phys. Rev. Lett. 131, 196601] Published Wed Nov 08, 2023

Found 2 papers in pr_res In a recent paper, Hance A technique that allows one to fuse nonperturbative many-body calculations and perturbative modern nuclear forces is reported on. The method was used to test some of the underlying assumptions of nuclear chiral forces and led to evidence that, at least in some regimes, they are violated.

Date of feed: Thu, 09 Nov 2023 04:17:02 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Comment on “Weak values and the past of a quantum particle”**

Lev Vaidman

Author(s): Lev Vaidman*et al.* [Phys. Rev. Res. **5**, 023048 (2023)] criticized recent proposals connecting weak values and the past of a quantum particle. I argue that their conclusion follows from a conceptual error in understanding the approach to the past of the particle they discuss.

[Phys. Rev. Research 5, 048001] Published Wed Nov 08, 2023

**Second-order perturbation theory in continuum quantum Monte Carlo calculations**

Ryan Curry, Joel E. Lynn, Kevin E. Schmidt, and Alexandros Gezerlis

Author(s): Ryan Curry, Joel E. Lynn, Kevin E. Schmidt, and Alexandros Gezerlis

[Phys. Rev. Research 5, L042021] Published Wed Nov 08, 2023

Found 1 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]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Emergence of Weyl fermions by ferrimagnetism in a noncentrosymmetric magnetic Weyl semimetal**

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