Found 30 papers in cond-mat We discuss a tensor network method for constructing the adiabatic gauge
potential -- the generator of adiabatic transformations -- as a matrix product
operator, which allows us to adiabatically transport matrix product states.
Adiabatic evolution of tensor networks offers a wide range of applications, of
which two are explored in this paper: improving tensor network optimization and
scanning phase diagrams. By efficiently transporting eigenstates to quantum
criticality and performing intermediary density matrix renormalization group
(DMRG) optimizations along the way, we demonstrate that we can compute ground
and low-lying excited states faster and more reliably than a standard DMRG
method at or near quantum criticality. We demonstrate a simple automated step
size adjustment and detection of the critical point based on the norm of the
adiabatic gauge potential. Remarkably, we are able to reliably transport states
through the critical point of the models we study.
Ideal crystalline membranes, realized by graphene and other atomic
monolayers, exhibit rich physics - a universal anomalous elasticity of the
critical "flat" phase characterized by a negative Poisson ratio, universally
singular elastic moduli, order-from-disorder and a crumpling transition. We
formulate a generalized $D$-dimensional field theory, parameterized by an
$O(d)\times O(D)$ tensor field with an {\it energetic} longitudinal constraint.
For a soft constraint the resulting field theory describes a new class of a
fluctuating "tattered" membranes, exhibiting a nonzero density of topological
connectivity defects - slits, cracks and faults at an effective medium level.
For hard, infinite-coupling constraint, the model reproduces the conventional
crystalline membrane and its crumpling transition, and thereby demonstrates the
essence of the difference between an elastic membrane and conventional field
theories. Two additional fixed points emerge within the critical manifold, (i)
globally attractive, "isotropic" $O(d)\times O(D)$, and (ii) "transverse",
which in $D=2$ is the exact "dual" of the elastic membrane. Their properties
are obtained in general $D,d$ from the renormalization group and the
self-consistent screening analyses.
Floquet engineering provides an optical means to manipulate electronic
bandstructures, however, carriers excited by the pump field can lead to an
effective heating, and can obscure measurement of the band changes. A recent
demonstration of the effects of Floquet engineering on a coherent ensemble of
excitons in monolayer WS$_2$ proved particularly sensitive to non-adiabatic
effects, while still being able to accurately resolve bandstructure changes.
Here, we drive an AC-Stark effect in monolayer WS$_2$ using pulses with
constant fluence but varying pulse duration (from 25-235~fs). With shorter pump
pulses, the corresponding increase in peak intensity introduces additional
carriers via two-photon absorption, leading to additional decoherence and peak
broadening (which makes it difficult to resolve the AC-Stark shift). We use
multidimensional coherent spectroscopy to create a coherent ensemble of
excitons in monolayer WS$_2$ and measure the evolution of the coherence
throughout the duration of the Floquet pump pulse. Changes to the amplitude of
the macroscopic coherence quantifies the additional broadening. At the same
time, the evolution of the average phase allows the instantaneous changes to
the bandstructure to be quantified, and is not impacted by the additional
broadening. This approach to measuring the evolution of Floquet-Bloch states
demonstrates a means to quantify effective heating and non-adiabaticity caused
by excited carriers, while at the same time resolving the coherent evolution of
the bandstructure.
We prove that that if the boundary of a topological insulator divides the
plane in two regions containing arbitrarily large balls, then it acts as a
conductor. Conversely, we show that topological insulators that fit within
strips do not need to admit conducting boundary modes.
2-TIPS (Two Temperature induced phase separation) refers to the phase
separation phenomenon observed in mixtures of active and passive particles
which are modelled using scalar activity. The active particles are connected to
a thermostat at high temperature while the passive particles are connected to
the thermostat at low temperature and the relative temperature difference
between "hot" and "cold" particles is taken as the measure of the activity of
the non-equilibrium system. The study of such binary mixtures of hot and cold
particles under various kinds of confinement is an important problem in many
physical and biological processes. The nature and extent of phase separation
are heavily influenced by the geometry of confinement, activity, and density of
the non-equilibrium binary mixture. Investigating such 3D binary mixtures
confined by parallel walls, we observe that, the active and passive particles
phase separate, but the extent of phase separation is reduced compared to bulk
phase separation at high densities and enhanced at low densities. However, when
the binary mixture of active and passive particles is confined inside a
spherical cavity, the phase separation is radial for small radii of the
confining sphere and the extent of phase separation is higher compared to their
bulk counterparts. Confinement leads to interesting properties in the
passive(cold) region like enhanced layering and high compression in the
direction parallel to the confining wall. In 2D, both the bulk and confined
systems of the binary mixture show a significant decrement in the extent of
phase separation at higher densities. This observation is attributed to the
trapping of active particles inside the passive cluster, which increases with
density. similar phase co-existence.
We investigated the transport properties in a normal metal/ferromagnet/normal
metal/superconductor junction based on semi-Dirac materials with inverted
energy gap. With a scattering matrix approach, we show that the electron
transport in the junction is spin-valley-polarized due to the ferromagnetic
exchange energy. It is also shown that the Andreev reflection is strongly
suppressed, which is a clear experimental signal for the
spin-valley-polarization in semi-Dirac materials.
Platinum-group transition-metal dichalcogenides have emerged as a subject of
considerable interest in condensed matter physics due to their remarkable
topological properties and unconventional superconducting behavior. In this
study, we report the synthesis and superconducting characteristics of a new
Dirac-type topological semimetallic compound 1$T$-RhSeTe. It shows type-II
superconductivity with a superconducting transition temperature of 4.72 K and a
high upper critical field. The coexistence of superconductivity and topological
properties makes it a prime candidate for hosting topological
superconductivity.
Twisted 2D layered materials have garnered a lot of attention recently as a
class of 2D materials whose interlayer interactions and electronic properties
are dictated by the relative rotation / twist angle between the adjacent
layers. In this work, we explore a prototype of such a twisted 2D system,
artificially stacked twisted bilayer graphene (TBLG), where we probe the
changes in the interlayer interactions and electron-phonon scattering pathways
as the twist angle is varied from 0{\deg} to 30{\deg}, using Raman
spectroscopy. The long range Moir\'e potential of the superlattice gives rise
to additional intravalley and intervalley scattering of the electrons in TBLG
which have been investigated through their Raman signatures. The density
functional theory (DFT) calculations of the electronic band structure of the
TBLG superlattices was found to be in agreement with the resonant Raman
excitations across the van Hove singularities in the valence and conduction
bands predicted for TBLG due to hybridization of bands from the two layers. We
also observe that the relative rotation between the graphene layers has a
marked influence on the second order overtone and combination Raman modes
signalling a commensurate-incommensurate transition in TBLG as the twist angle
increases. This serves as a convenient and rapid characterization tool to
determine the degree of commensurability in TBLG systems.
1.8 micrometer-thick magnesium hydride films were synthesized in a
single-step process by reactive plasma-assisted sputtering. The MgH2 thin
films, which were deposited on two types of flexible surfaces (namely graphite
and polyimide foils) were found to adhere on both substrates. In all cases, XRD
analysis revealed an as-deposited thin film consisting of alpha-MgH2, a
tetragonal, rutile-type crystal structure (space group \#136). The hydrogen
sorption capacities of the uncapped films were studied over successive
desorption/absorption cycles performed at 350 {\textdegree}C. The first
desorption always shows a slow kinetics that can be explained by a superficial
oxidation of the films. However, once the passivating layer is removed, the
following dehydrogenations occur faster. Multiple cycling of the film deposited
on polyimide resulted in delamination of the film and its conversion into loose
powder. As for MgH2 deposited on the flexible graphite substrate, a fully
reversible capacity was observed over 28 cycles with no delamination of the
film. Upon cycling, the microstructure of the film has evolved from homogeneous
fibrous to an untextured morphology with a higher degree of crystallinity.
We develop a test for the vanishing of higher central charges of a fermionic
topological order, which is a necessary condition for the existence of a gapped
boundary, purely in terms of the modular data of the super-modular tensor
category. More precisely, we test whether a given super-MTC has $c = 0$ mod
$\frac{1}{2}$, and, if so, whether the modular extension with $c =0$ mod $8$
has vanishing higher central charges. The test itself does not require an
explicit computation of the modular extensions and is easily carried out. We
apply this test to known examples of super-modular tensor categories. Since our
test allows us to obtain information about the chiral central charge of a
super-modular tensor category in terms of its modular data without direct
knowledge of its modular extensions, this can also be thought of as the first
step towards a fermionic analogue of the Gauss-Milgram formula.
Humans rely on multimodal perception to form representations of the world.
This implies that environmental stimuli must remain consistent and predictable
throughout their journey to our sensory organs. When it comes to vision,
electromagnetic waves are minimally affected when passing through air or glass
treated for chromatic aberrations. Similar conclusions can be drawn for hearing
and acoustic waves. However, tools that propagate elastic waves to our
cutaneous afferents tend to color tactual perception due to parasitic
mechanical attributes such as resonances and inertia. These issues are often
overlooked, despite their critical importance for haptic devices that aim to
faithfully render or record tactile interactions. Here, we investigate how to
optimize this mechanical transmission with sandwich structures made from rigid,
lightweight carbon fiber sheets arranged around a 3D-printed lattice core.
Through a comprehensive parametric evaluation, we demonstrate that this design
paradigm provides superior haptic transparency. Drawing an analogy with
topology optimization, our solution approaches a foreseeable technological
limit. This novel medium offers a practical way to create high-fidelity haptic
interfaces, opening new avenues for research on tool-mediated interactions.
Time-reversal-odd ($\mathcal{T}$-odd) nonlinear current response has been
theoretically proposed and experimentally confirmed recently. However, the role
of disorder scattering in the response, especially whether it contributes to
the $\sigma_{xx}$-independent term, has not been clarified. In this work, we
derive a general scaling law for this effect, which accounts for multiple
scattering sources. We show that the nonlinear conductivity is generally a
quartic function in $\sigma_{xx}$. Besides intrinsic contribution, extrinsic
contributions from scattering also enter the zeroth order term, and their
values can be comparable to or even larger than the intrinsic one. Terms beyond
zeroth order are all extrinsic. Cubic and quartic terms must involve skew
scattering and they signal competition between at least two scattering sources.
The behavior of zeroth order extrinsic terms is explicitly demonstrated in a
Dirac model. Our finding reveals the significant role of disorder scattering in
$\mathcal{T}$-odd nonlinear transport, and establishes a foundation for
analyzing experimental result.
Electronic correlation effects are manifested in quantum materials when
either the onsite Coulomb repulsion is large or the electron kinetic energy is
small. The former is the dominant effect in the cuprate superconductors or
heavy fermion systems while the latter in twisted bilayer graphene or
geometrically frustrated metals. However, the simultaneous cooperation of both
effects in the same quantum material--the design principle to produce a
correlated topological flat bands pinned at the Fermi level--remains rare.
Here, using angle-resolved photoemission spectroscopy, we report the
observation of a flat band at the Fermi level in a 3$d$ pyrochlore metal
CuV$_2$S$_4$. From a combination of first-principles calculations and
slave-spin calculations, we understand the origin of this band to be a
destructive quantum-interference effect associated with the V pyrochlore
sublattice and further renormalization to the Fermi level by electron
interactions in the partially filled V $t_{2g}$ orbitals. As a result, we find
transport behavior that indicates a deviation from Fermi-liquid behavior as
well as a large Sommerfeld coefficient. Our work demonstrates the pathway into
correlated topology by constructing and pinning correlated flat bands near the
Fermi level out of a pure $d$-electron system by the combined cooperation of
local Coulomb interactions and geometric frustration in a pyrochlore lattice
system.
The Niobium surface is almost always covered by a native oxide layer which
greatly influences the performance of superconducting devices. Here we
investigate the highly stable Niobium oxide overlayer of Nb(110), which is
characterised by its distinctive nanocrystal structure as observed by scanning
tunnelling microscopy (STM). Our ab-initio density functional theory (DFT)
calculations show that a subtle reconstruction in the surface Niobium atoms
gives rise to rows of 4-fold coordinated oxygen separated by regions of 3-fold
coordinated oxygen. The 4-fold oxygen rows are determined to be the source of
the nanocrystal pattern observed in STM, and the two chemical states of oxygen
observed in core-level X-ray photoelectron spectroscopy (XPS) are ascribed to
the 3-fold and 4-fold oxygens. Furthermore, we find excellent agreement between
the DFT calculated electronic structure with scanning tunnelling spectroscopy
and valence XPS measurements.
The emergence of topological magnetism in two-dimensional (2D) van der Waals
(vdW) magnetic materials promoted 2D heterostructures as key building-blocks of
devices for information technology based on topological concepts. Here, we
demonstrate the all-electric switching of the topological nature of individual
magnetic objects emerging in 2D vdW heterobillayers. We show from the first
principles that an external electric field modifies the vdW gap between CrTe
$_2$ and (Rh, Ti)Te$_2$ layers and alters the underlying magnetic interactions.
This enables switching between ferromagnetic skyrmions and meron pairs in the
CrTe$_2$/RhTe$_2$ heterobilayer while it enhances the stability of frustrated
antiferromagnetic merons in the CrTe$_2$/TiTe$_2$ heterobilayer. We envision
that the electrical engineering of distinct topological magnetic solitons in a
single device could pave the way for novel energy-efficient mechanisms to store
and transmit information with applications in spintronics.
The discovery of graphene led to a burst in search for 2D materials
originating from layered atomic crystals coupled by van der Waals force. While
bulk bismuth crystals share this layered crystal structure, unlike other group
V members of the periodic table, its interlayer bonds are stronger such that
traditional mechanical cleavage and exfoliation techniques have shown to be
inefficient. In this work, we present a novel mechanical cleavage method for
exfoliating bismuth by utilizing the stress concentration effect induced by
micro-trench SiO2 structures. As a result, the exfoliated bismuth flakes can
achieve thicknesses down to the sub-10 nm range which are analyzed by AFM and
Raman spectroscopy.
Turbulence is a complex spatial and temporal structure created by the strong
non-linear dynamics of fluid flows at high Reynolds numbers. Despite being an
ubiquitous phenomenon that has been studied for centuries, a full understanding
of turbulence remained a formidable challenge. Here, we introduce tools from
the fields of quantum chaos and Random Matrix Theory (RMT) and present a
detailed analysis of image datasets generated from turbulence simulations of
incompressible and compressible fluid flows. Focusing on two observables: the
data Gram matrix and the single image distribution, we study both the local and
global eigenvalue statistics and compare them to classical chaos, uncorrelated
noise and natural images. We show that from the RMT perspective, the turbulence
Gram matrices lie in the same universality class as quantum chaotic rather than
integrable systems, and the data exhibits power-law scalings in the bulk of its
eigenvalues which are vastly different from uncorrelated classical chaos,
random data, natural images. Interestingly, we find that the single sample
distribution only appears as fully RMT chaotic, but deviates from chaos at
larger correlation lengths, as well as exhibiting different scaling properties.
We present an efficient and robust protocol for quantum-enhanced sensing
using a single-spin qubit in the topological waveguide system. Our method
relies on the topological-paired bound states, which are localized near the
spin and can be effectively regarded as a two-level system. Through the lens of
Bayesian inference theory, we show the sensitivity can reach the Heisenberg
limit across a large field range. Inheriting from the topological robustness of
the waveguide, our sensing protocol is robust against local perturbations. The
advantages of our protocol are multifold as it allows for sensing various
parameters and uses a product initial state, which can be easily prepared in
experiments. We expect this approach would pave the way towards robust
topological quantum sensors based on near term quantum platforms such as
topological photonics and Rydberg arrays.
Ground state preparation is classically intractable for general Hamiltonians.
On quantum devices, shallow parameterized circuits can be effectively trained
to obtain short-range entangled states under the paradigm of variational
quantum eigensolver, while deep circuits are generally untrainable due to the
barren plateau phenomenon. In this Letter, we give a general lower bound on the
variance of circuit gradients for arbitrary quantum circuits composed of local
2-designs. Based on our unified framework, we prove the absence of barren
plateaus in training finite local-depth circuits for the ground states of local
Hamiltonians. These circuits are allowed to be deep in the conventional
definition of circuit depth so that they can generate long-range entanglement,
but their local depths are finite, i.e., there is only a finite number of
non-commuting gates acting on individual qubits. This fact suggests that
long-range entangled ground states, such as topologically ordered states, are
in general possible to be prepared efficiently on quantum devices via
variational methods. We validate our analytical results with extensive
numerical simulations and demonstrate the effectiveness of variational training
using the generalized toric code model.
A systematic approach to dualities in symmetric (1+1)d quantum lattice models
has recently been proposed in terms of module categories over the symmetry
fusion categories. By characterizing the non-trivial way in which dualities
intertwine closed boundary conditions and charge sectors, these can be
implemented by unitary matrix product operators. In this manuscript, we explain
how to turn such duality operators into unitary linear depth quantum circuits
via the introduction of ancillary degrees of freedom that keep track of the
various sectors. The linear depth is consistent with the fact that these
dualities change the phase of the states on which they act. When supplemented
with measurements, we show that dualities with respect to symmetries encoded
into nilpotent fusion categories can be realised in constant depth. The
resulting circuits can for instance be used to efficiently prepare short- and
long-range entangled states or map between different gapped boundaries of
(2+1)d topological models.
Amperean superconductivity is an exotic phenomenon stemming from attractive
effective electron-electron interactions (EEEIs) mediated by a transverse gauge
field. Originally introduced in the context of quantum spin liquids and high-Tc
superconductors, Amperean superconductivity has been recently proposed to occur
at temperatures on the order of 1-20 K in two-dimensional, parabolic-band,
electron gases embedded inside deep sub-wavelength optical cavities. In this
work, we first generalize the microscopic theory of cavity-induced Amperean
superconductivity to the case of graphene and then argue that this
superconducting state cannot be achieved in the deep sub-wavelength regime. In
the latter regime, indeed, a cavity induces only EEEIs between density
fluctuations rather than the current-current interactions which are responsible
for Amperean pairing.
Bulk dislocation lattice defects are instrumental in identifying
translationally active topological insulators (TATIs), featuring band inversion
at a finite momentum (${\bf K}_{\rm inv}$). As such, TATIs host robust gapless
modes around the dislocation core, when the associated Burgers vector ${\bf b}$
satisfies ${\bf K}_{\rm inv} \cdot {\bf b}=\pi$ (modulo $2 \pi$). From the time
evolution of appropriate density matrices, we show that when a TATI via a real
time ramp enters into a trivial or translationally inert topological insulating
phase, devoid of gapless dislocation modes, the signatures of the preramp
defect modes survive for a long time. More intriguingly, as the system ramps
into a TATI phase from any translationally inert insulator, signature of the
dislocation mode dynamically builds up near its core, which is prominent for
slow ramps. We exemplify these generic outcomes for two-dimensional
time-reversal symmetry breaking insulators. Proposed dynamic responses at the
dislocation core can be experimentally observed in quantum crystals, optical
lattices and metamaterials with time a tunable band gap.
Immersed in external magnetic fields ($B$), buckled graphene constitutes an
ideal tabletop setup, manifesting a confluence of time-reversal symmetry
(${\mathcal T}$) breaking Abelian ($B$) and ${\mathcal T}$-preserving
strain-induced internal axial ($b$) magnetic fields. In such a system, here we
numerically compute two-terminal conductance ($G$), and four- as well as
six-terminal Hall conductivity ($\sigma_{xy}$) for spinless fermions. On a flat
graphene ($b=0$), the $B$ field produces quantized plateaus at $G=\pm
|\sigma_{xy}|=(2n+1) e^2/h$, where $n=0,1,2, \cdots$. The strain induced $b$
field lifts the two-fold valley degeneracy of higher Landau levels and leads to
the formation of additional even-integer plateaus at $G=\pm |\sigma_{xy}|=
(2,4,\cdots)e^2/h$, when $B>b$. While the same sequence of plateaus is observed
for $G$ when $b>B$, the numerical computation of $\sigma_{xy}$ in Hall bar
geometries in this regime becomes unstable. A plateau at $G=\sigma_{xy}=0$
always appears with the onset of a charge-density-wave order, causing a
staggered pattern of fermionic density between two sublattices of the honeycomb
lattice.
We consider a dimer lattice of the Fermi-Pasta-Ulam-Tsingou (FPUT) type,
where alternating linear couplings have a controllably small difference, and
the cubic nonlinearity ($\beta$-FPUT) is the same for all interaction pairs. We
use a weakly nonlinear formal reduction within the lattice bandgap to obtain a
continuum, nonlinear Dirac-type system. We derive the Dirac soliton profiles
and the model's conservation laws analytically. We then examine the cases of
the semi-infinite and the finite domains and illustrate how the soliton
solutions of the bulk problem can be ``glued'' to the boundaries for different
types of boundary conditions. We thus explain the existence of various kinds of
nonlinear edge states in the system, of which only one leads to the standard
topological edge states observed in the linear limit. We finally examine the
stability of bulk and edge states and verify them through direct numerical
simulations, in which we observe a solitary wave setting into motion due to the
instability.
The appearance of spontaneous charge order in chemical systems is often
associated with the emergence of novel, and useful, properties. Here we show
through single crystal diffraction that the Eu ions in the mixed valent metal
EuPd$_3$S$_4$ undergo long-range charge ordering at $T_{\mathrm{CO}} = 340
\mathrm{~K}$ resulting in simple cubic lattices of Eu$^{2+}$ ($J = 7/2$) and
Eu$^{3+}$ ($J = 0$) ions. As only one of the two sublattices has a non-magnetic
ground state, the charge order results in the emergence of remarkably simple
G-type antiferromagnetic order at $T_{\mathrm{N}} = 2.85(6) \mathrm{~K}$,
observed in magnetization, specific heat, and neutron diffraction. Application
of a $0.3 \mathrm{~T}$ field is sufficient to induce a spin flop transition to
a magnetically polarized, but still charge ordered, state. Density functional
theory calculations show that this charge order also modifies the electronic
degeneracies present in the material: without charge order, EuPd$_3$S$_4$ is an
example of a double Dirac material containing 8-fold degenerate electronic
states, greater than the maximum degeneracy of six possible in molecular
systems. The symmetry reduction from charge order transmutes 8-fold double
Dirac states into 4-fold Dirac states, a degeneracy that can be preserved even
in the presence of the magnetic order. Our results show not only how charge
order can be used to produce interesting magnetic lattices, but also how it can
be used to engineer controlled degeneracies in electronic states.
We investigate the role of quantum coherence and higher harmonics resulting
from multiple-path interference in nonlinear thermoelectricity in a
two-terminal triangular triple-dot Aharonov-Bohm (AB) interferometer. We
quantify the trade-off between efficiency and power in the nonlinear regime of
our simple setup comprising three non-interacting quantum dots (two connected
to two biased metallic reservoirs) placed at the vertex of an equilateral
triangle, and a magnetic flux $\Phi$ pierces it perpendicularly. For a
spatially symmetric setup, we achieve optimal efficiency and power output when
the inter-dot tunneling strength is comparable to the dot-lead coupling, AB
phase $\phi=\pi/2$. Our analysis reveals that the presence of higher harmonics
is necessary but not sufficient to achieve optimal power output. The maximal
constructive interference represented by three close-packed resonance peaks of
the unit transmission can enhance the power output ($P_{max}\sim
2.35\,\mathrm{fW}$) almost 3.5 times as compared to the case where only a
single channel participates in the transport, and the corresponding efficiency
is about $0.80\eta_{c}$ where $\eta_{c}$ is the Carnot efficiency. Geometric
asymmetries and their effects on efficiency and power output are also
investigated. An asymmetric setup characterized by the ratio of the coupling to
the source and the drain terminals ($x$) can further enhance the maximum power
output $P_{max}\sim 3.85\,\mathrm{fW}$ for $x=1.5$ with the same efficiency as
that of the symmetric case. Our investigation reveals that the output power and
efficiency are optimal in the wide-band limit. The power output is
significantly reduced for the narrow-band case. On the other hand, disorder
effects radically reduce the performance of the heat engine.
The coherent dynamics of a quantum mechanical two-level system passing
through an anti-crossing of two energy levels can give rise to
Landau-Zener-St\"uckelberg-Majorana (LZSM) interference. LZSM interference
spectroscopy has proven to be a fruitful tool to investigate charge noise and
charge decoherence in semiconductor quantum dots (QDs). Recently, bilayer
graphene has developed as a promising platform to host highly tunable QDs
potentially useful for hosting spin and valley qubits. So far, in this system
no coherent oscillations have been observed and little is known about charge
noise in this material. Here, we report coherent charge oscillations and
$T_2^*$ charge decoherence times in a bilayer graphene double QD. The charge
decoherence times are measured independently using LZSM interference and photon
assisted tunneling. Both techniques yield $T_2^*$ average values in the range
of 400 to 500 ps. The observation of charge coherence allows to study the
origin and spectral distribution of charge noise in future experiments.
We have studied in detail the $M$-$p$ balanced spin glass model, especially
the case $p=4$. These types of model have relevance to structural glasses. The
models possess two kinds of broken replica states; those with one-step replica
symmetry breaking (1RSB) and those with full replica symmetry breaking (FRSB).
To determine which arises requires studying the Landau expansion to quintic
order. There are 9 quintic order coefficients, and 5 quartic order
coefficients, whose values we determine for this model. We show that it is only
for $2 \leq M < 2.4714 \cdots$ that the transition at mean-field level is to a
state with FRSB, while for larger $M$ values there is either a continuous
transition to a state with 1RSB (when $ M \leq 3$) or a discontinuous
transition for $M > 3$. The Gardner transition from a 1RSB state at low
temperatures to a state with FRSB also requires the Landau expansion to be
taken to quintic order. Our result for the form of FRSB in the Gardner phase is
similar to that found when $2 \leq M < 2.4714\cdots$, but differs from that
given in the early paper of Gross et al. [Phys. Rev. Lett. 55, 304 (1985)].
Finally we discuss the effects of fluctuations on our mean-field solutions
using the scheme of H\"{o}ller and Read [Phys. Rev. E 101, 042114 (2020)}] and
argue that such fluctuations will remove both the continuous 1RSB transition
and discontinuous 1RSB transitions when $8 >d \geq 6$ leaving just the FRSB
continuous transition. We suggest values for $M$ and $p$ which might be used in
simulations to confirm whether fluctuation corrections do indeed remove the
1RSB transitions.
We present a simple proof of a sufficient condition for the uniqueness of
non-equilibrium steady states of Gorini-Kossakowski-Sudarshan-Lindblad
equations. We demonstrate the applications of the sufficient condition using
examples of the transverse-field Ising model, the XYZ model, and the
tight-binding model with dephasing.
The study of twisted bilayer graphene (TBG) is a hot topic in condensed
matter physics with special focus on {\em magic angles} of twisting at which
TBG acquires unusual properties. Mathematically, topologically non-trivial flat
bands appear at those special angles. The chiral model of TBG pioneered by
Tarnopolsky--Kruchkov--Vishwanath has particularly nice mathematical properties
and we survey, and in some cases, clarify, recent rigorous results which
exploit them.

Date of feed: Fri, 03 Nov 2023 00:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Variational adiabatic transport of tensor networks. (arXiv:2311.00748v1 [quant-ph])**

Hyeongjin Kim, Matthew T. Fishman, Dries Sels

**"Tattered" membrane. (arXiv:2311.00752v1 [cond-mat.stat-mech])**

Pierre Le Doussal, Leo Radzihovsky

**Floquet engineering in the presence of optically excited carriers. (arXiv:2311.00916v1 [cond-mat.mes-hall])**

Mitchell A. Conway, Jonathan O. Tollerud, Thi-Hai-Yen Vu, Kenji Watanabe, Takashi Taniguchi, Michael S. Fuhrer, Mark T. Edmonds, Jeffrey A. Davis

**Topological edge spectrum along curved interfaces. (arXiv:2311.00918v1 [math-ph])**

Alexis Drouot, Xiaowen Zhu

**Effect of Confinement and Topology: 2-TIPS vs MIPS. (arXiv:2311.00929v1 [cond-mat.soft])**

Nayana Venkatareddy, Jaydeep Mandal, Prabal K. Maiti

**The generation and detection of the spin-valley-polarization in semi-Dirac materials. (arXiv:2311.00948v1 [cond-mat.supr-con])**

Yupeng Huang (1), R. Shen (1 and 2) ((1) National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing, 210093, China, (2) Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China)

**Superconducting Properties of Topological Semimetal 1$T$-RhSeTe. (arXiv:2311.01019v1 [cond-mat.supr-con])**

C. Patra, T. Agarwal, Arushi, P. Manna, N. Bhatt, R. S. Singh, R. P. Singh

**Probing interlayer interactions and commensurate-incommensurate transition in twisted bilayer graphene through Raman spectroscopy. (arXiv:2311.01029v1 [cond-mat.mtrl-sci])**

Vineet Pandey, Subhendu Mishra, Nikhilesh Maity, Sourav Paul, Abhijith M B, Ajit Roy, Nicholas R Glavin, Kenji Watanabe, Takashi Taniguchi, Abhishek Kumar Singh, Vidya Kochat

**Magnesium hydride films deposited on flexible substrates: Structure, morphology and hydrogen sorption properties. (arXiv:2311.01071v1 [physics.app-ph])**

Huy Le-Quoc (NEEL - MRS, LPSC), Marie Coste (NEEL - MRS, LPSC), Ana Lacoste (LPSC), L. Laversenne (NEEL - MRS)

**Gapped boundaries of fermionic topological orders and higher central charges. (arXiv:2311.01096v1 [cond-mat.str-el])**

Minyoung You

**An Optimal Medium for Haptics. (arXiv:2311.01179v1 [cond-mat.mtrl-sci])**

Thomas Daunizeau, Sinan Haliyo, Vincent Hayward

**Scaling Law for Time-Reversal-Odd Nonlinear Transport. (arXiv:2311.01219v1 [cond-mat.mes-hall])**

Yue-Xin Huang, Cong Xiao, Shengyuan A. Yang, Xiao Li

**Non-Fermi liquid behavior in a correlated flatband pyrochlore lattice. (arXiv:2311.01269v1 [cond-mat.str-el])**

Jianwei Huang, Lei Chen, Yuefei Huang, Chandan Setty, Bin Gao, Yue Shi, Zhaoyu Liu, Yichen Zhang, Turgut Yilmaz, Elio Vescovo, Makoto Hashimoto, Donghui Lu, Boris I. Yakobson, Pengcheng Dai, Jiun-Haw Chu, Qimiao Si, Ming Yi

**Unravelling the atomic and electronic structure of nanocrystals on superconducting Nb(110): Impact of the oxygen monolayer. (arXiv:2311.01275v1 [cond-mat.mtrl-sci])**

Samuel Berman, Ainur Zhussupbekova, Brian Walls, Killian Walshe, Sergei I. Bozhko, Andrei Ionov, David D. O'Regan, Igor V. Shvets, Kuanysh Zhussupbekov

**Electrical engineering of topological magnetism in two-dimensional heterobilayers. (arXiv:2311.01294v1 [cond-mat.mtrl-sci])**

Nihad Abuawwad, Manuel dos Santos Dias, Hazem Abusara, Samir Lounis

**Method of Mechanical Exfoliation of Bismuth with Micro-Trench Structures. (arXiv:2311.01321v1 [cond-mat.mes-hall])**

Oulin Yu, Raphaela Allgayer, Simon Godin, Jacob Lalande, Paolo Fossati, Chunwei Hsu, Thomas Szkopek, Guillaume Gervais

**The Universal Statistical Structure and Scaling Laws of Chaos and Turbulence. (arXiv:2311.01358v1 [cond-mat.stat-mech])**

Noam Levi, Yaron Oz

**Topological Waveguide Quantum Sensors. (arXiv:2311.01370v1 [quant-ph])**

Tao Zhang, Jiazhong Hu, Xingze Qiu

**Absence of barren plateaus in finite local-depth circuits with long-range entanglement. (arXiv:2311.01393v1 [quant-ph])**

Hao-Kai Zhang, Shuo Liu, Shi-Xin Zhang

**Low-depth unitary quantum circuits for dualities in one-dimensional quantum lattice models. (arXiv:2311.01439v1 [quant-ph])**

Laurens Lootens, Clement Delcamp, Dominic Williamson, Frank Verstraete

**Can deep sub-wavelength cavities induce Amperean superconductivity in a 2D material?. (arXiv:2210.10371v2 [cond-mat.supr-con] UPDATED)**

Gian Marcello Andolina, Antonella De Pasquale, Francesco Maria Dimitri Pellegrino, Iacopo Torre, Frank H. L. Koppens, Marco Polini

**Dynamic melting and condensation of topological dislocation modes. (arXiv:2210.15661v2 [cond-mat.mes-hall] UPDATED)**

Sanjib Kumar Das, Bitan Roy

**Transport in strained graphene: Interplay of Abelian and axial magnetic fields. (arXiv:2212.00788v2 [cond-mat.mes-hall] UPDATED)**

Aqeel Ahmed, Sanjib Kumar Das, Bitan Roy

**Dirac Solitons and Topological Edge States in the $\beta$-Fermi-Pasta-Ulam-Tsingou dimer lattice. (arXiv:2212.02134v2 [nlin.PS] UPDATED)**

Rajesh Chaunsali, Panayotis G. Kevrekidis, Dimitri Frantzeskakis, Georgios Theocharis

**Formation of a simple cubic antiferromagnet through charge ordering in a double Dirac material. (arXiv:2303.02218v2 [cond-mat.str-el] UPDATED)**

T. Berry (1, 2), V. C. Morano (2), T. Halloran (2), X. Zhang (3), T. J. Slade (4, 5), A. Sapkota (4, 5), S. L. Budko (4, 5), W. Xie (6), D. H. Ryan (7), Z. Xu (8), Y. Zhao (8, 9), J. W. Lynn (8), T. Fennell (10), P. C. Canfield (4, 5), C. L. Broholm (2, 11), T. M. McQueen (1, 2, 11) ((1) Department of Chemistry, The Johns Hopkins University, (2) Institute for Quantum Matter and William H. Miller III Department of Physics and Astronomy, The Johns Hopkins University, (3) Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, (4) Ames Laboratory, U.S. Department of Energy, Iowa State University, (5) Department of Physics and Astronomy, Iowa State University, (6) Department of Chemistry and Chemical Biology, Rutgers University, (7) Physics Department and Centre for the Physics of Materials, McGill University, (8) NIST Center for Neutron Research, National Institute of Standards and Technology, (9) Department of Materials Science and Engineering, University of Maryland, (10) Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, (11) Department of Materials Science and Engineering, The Johns Hopkins University)

**Quantum coherent control of non-linear thermoelectric transport in a triple-dot Aharonov-Bohm heat engine. (arXiv:2303.09202v2 [cond-mat.mes-hall] UPDATED)**

Jayasmita Behera, Salil Bedkihal, Bijay Kumar Agarwalla, Malay Bandyopadhyay

**Coherent Charge Oscillations in a Bilayer Graphene Double Quantum Dot. (arXiv:2303.10119v3 [cond-mat.mes-hall] UPDATED)**

Katrin Hecker, Luca Banszerus, Aaron Schäpers, Samuel Möller, Anton Peters, Eike Icking, Kenji Watanabe, Takashi Taniguchi, Christian Volk, Christoph Stampfer

**Replica Symmetry Broken States of some Glass Models. (arXiv:2308.14229v2 [cond-mat.dis-nn] UPDATED)**

J. Yeo, M. A. Moore

**Uniqueness of steady states of Gorini-Kossakowski-Sudarshan-Lindblad equations: a simple proof. (arXiv:2309.00335v3 [quant-ph] UPDATED)**

Hironobu Yoshida

**Mathematical results on the chiral model of twisted bilayer graphene (with an appendix by Mengxuan Yang and Zhongkai Tao). (arXiv:2310.20642v2 [cond-mat.mes-hall] UPDATED)**

Maciej Zworski, Mengxuan Yang, Zhongkai Tao

Found 7 papers in prb Topological insulators are unique materials possessing forbidden topological gap and behaving similar to usual insulators in their bulk, but at the same time supporting localized in-gap states at their edges that demonstrate exceptional robustness, because they are protected by topology of the syste… Laser radiation incident on a ferromagnetic sample produces excited electrons and currents whose spin polarization must not be aligned with the magnetization—an effect due to spin-orbit coupling that is ubiquitous in spin- and angle-resolved photoemission. In this paper, we report on a systematic in… We examine spin density wave and triplet superconductivity as possible ground states of the Bernal bilayer graphene. The spin density wave is stable for the unbiased and undoped bilayer. Both the doping and the applied bias voltage destroy this phase. We show that, when biased and slightly doped, a … Tuning superconductivity in topological materials by means of chemical substitution, electrostatic gating, or pressure is thought to be an effective route towards realizing topological superconductivity with their inherent Majorana fermions, the manipulation of which may form the basis for future to… The magnetic exchange interaction of ${\mathrm{Fe}}_{n}$ $(n=1,2,3)$ clusters with the quasiparticles of superconducting Pb(111) is probed by scanning tunneling spectroscopy of Yu-Shiba-Rusinov states. The spectral weight of the Yu-Shiba-Rusinov resonances is shifted from the coherence peaks in the … We demonstrate that a complete class of flat-band lattices with underlying commutative local symmetries exhibit a locally fragmented Hilbert space. The equitable partition theorem ensures distinct parities for the compact localized states (CLSs) present in this class of flat-band lattices and the ex… Subharmonics of electric dipole spin resonance (EDSR) mediated by Landau-Zener-Stückelberg-Majorana tunneling transitions are studied numerically and analytically in a Zeeman-split four-level system with strong spin-orbit coupling that can be realized, for example, in a GaAs-based double quantum dot…

Date of feed: Fri, 03 Nov 2023 04:16:55 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) **Topological gap solitons in Rabi Su-Schrieffer-Heeger lattices**

Chunyan Li and Yaroslav V. Kartashov

Author(s): Chunyan Li and Yaroslav V. Kartashov

[Phys. Rev. B 108, 184301] Published Thu Nov 02, 2023

**Ultrafast dynamics of electrons excited by femtosecond laser pulses: Spin polarization and spin-polarized currents**

Oliver Busch, Franziska Ziolkowski, Ingrid Mertig, and Jürgen Henk

Author(s): Oliver Busch, Franziska Ziolkowski, Ingrid Mertig, and Jürgen Henk

[Phys. Rev. B 108, 184401] Published Thu Nov 02, 2023

**Triplet superconductivity and spin density wave in biased AB bilayer graphene**

A. O. Sboychakov, A. V. Rozhkov, and A. L. Rakhmanov

Author(s): A. O. Sboychakov, A. V. Rozhkov, and A. L. Rakhmanov

[Phys. Rev. B 108, 184503] Published Thu Nov 02, 2023

**Multiple superconducting phases driven by pressure in the topological insulator ${\mathrm{GeSb}}_{4}{\mathrm{Te}}_{7}$**

W. Zhou, B. Li, Y. Shen, J. J. Feng, C. Q. Xu, H. T. Guo, Z. He, B. Qian, Ziming Zhu, and Xiaofeng Xu

Author(s): W. Zhou, B. Li, Y. Shen, J. J. Feng, C. Q. Xu, H. T. Guo, Z. He, B. Qian, Ziming Zhu, and Xiaofeng Xu

[Phys. Rev. B 108, 184504] Published Thu Nov 02, 2023

**Magnetic bound states of iron clusters on a superconductor**

Silas Amann, Nóra Kucska, András Lászlóffy, Nicolas Néel, Balázs Újfalussy, Levente Rózsa, Krisztián Palotás, and Jörg Kröger

Author(s): Silas Amann, Nóra Kucska, András Lászlóffy, Nicolas Néel, Balázs Újfalussy, Levente Rózsa, Krisztián Palotás, and Jörg Kröger

[Phys. Rev. B 108, 195403] Published Thu Nov 02, 2023

**Flat band induced local Hilbert space fragmentation**

Eulàlia Nicolau, Anselmo M. Marques, Ricardo G. Dias, and Verònica Ahufinger

Author(s): Eulàlia Nicolau, Anselmo M. Marques, Ricardo G. Dias, and Verònica Ahufinger

[Phys. Rev. B 108, 205104] Published Thu Nov 02, 2023

**Controllable single-spin evolution at subharmonics of electric dipole spin resonance enhanced by four-level Landau-Zener-Stückelberg-Majorana interference**

D. V. Khomitsky, M. V. Bastrakova, V. O. Munyaev, N. A. Zaprudnov, and S. A. Studenikin

Author(s): D. V. Khomitsky, M. V. Bastrakova, V. O. Munyaev, N. A. Zaprudnov, and S. A. Studenikin

[Phys. Rev. B 108, 205404] Published Thu Nov 02, 2023

Found 1 papers in pr_res Employing currently available quantum technology, we design and implement a nonclassically correlated SWAP heat engine that allows to achieve an efficiency above the standard Carnot limit. Such an engine also boosts the amount of extractable work, in a wider parameter window, with respect to engine'…

Date of feed: Fri, 03 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) **Correlation-boosted quantum engine: A proof-of-principle demonstration**

Marcela Herrera, John H. Reina, Irene D'Amico, and Roberto M. Serra

Author(s): Marcela Herrera, John H. Reina, Irene D'Amico, and Roberto M. Serra

[Phys. Rev. Research 5, 043104] Published Thu Nov 02, 2023

Found 1 papers in nano-lett

Date of feed: Thu, 02 Nov 2023 13:07:17 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **[ASAP] Topological Transitions and Surface Umklapp Scattering in Weakly Modulated Periodic Metasurfaces**

Kobi Cohen, Shai Tsesses, Shimon Dolev, Yael Blechman, Guy Ankonina, and Guy BartalNano LettersDOI: 10.1021/acs.nanolett.3c02759

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) **Emergent superconductivity in topological-kagome-magnet/metal heterostructures**

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Found 1 papers in scipost **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) **Topological Defects in Floquet Circuits, by Mao Tian Tan, Yifan Wang, Aditi Mitra**

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Submitted on 2023-11-02, refereeing deadline 2023-11-17.