Found 51 papers in cond-mat Following the discovery of moir\'e-driven superconductivity in twisted
graphene multilayers, twistronics has spurred a surge of interest in tailored
broken symmetries through angular rotations, enabling new properties from
electronics to photonics and phononics. Analogously, in monoclinic polar
crystals a nontrivial angle between non-degenerate dipolar phonon resonances
can naturally emerge due to asymmetries in their crystal lattice, and its
variations are associated with intriguing polaritonic phenomena, including
axial dispersion, i.e., a rotation of the optical axis with frequency, and
microscopic shear effects that result in asymmetric loss distributions. So far
these phenomena were restricted to specific mid-infrared frequencies, difficult
to access with conventional lasers, and fundamentally limited by the degree of
asymmetry and the strength of light-matter interactions available in natural
crystals. Here, we leverage twistronics to demonstrate giant axial dispersion
and loss asymmetry of hyperbolic waves in elastic metasurfaces, by tailoring
the angle between coupled pairs of anisotropic metasurfaces. We show extreme
control over elastic wave dispersion via the twist angle, and leverage the
resulting phenomena to demonstrate reflection-free negative refraction, as well
as the application of axial dispersion to achieve diffraction-free
non-destructive testing, whereby the angular direction of a hyperbolic probe
wave is encoded into its frequency. Our work welds the concepts of twistronics,
non-Hermiticity and extreme anisotropy, demonstrating the powerful
opportunities enabled by metasurfaces for tunable, highly directional surface
acoustic wave propagation, of great interest for applications ranging from
seismic mitigation to on-chip phononics and wireless communications, paving the
way towards their translation into emerging photonic and polaritonic
metasurface technologies.
Laser induced shift of atomic states due to the AC-Stark effect has played a
central role in cold-atom physics and facilitated their emergence as analog
quantum simulators. Here, we explore this phenomena in an atomically thin layer
of semiconductor MoSe$_2$, which we embedded in a heterostructure enabling
charge tunability. Shining an intense pump laser with a small detuning from the
material resonances, we generate a large population of virtual collective
excitations, and achieve a regime where interactions with this background
population is the leading contribution to the AC-Stark shift. Using this
technique we study how itinerant charges modify -- and dramatically enhance --
the interactions between optical excitations. In particular, our experiments
show that the interaction between attractive polarons could be two orders of
magnitude stronger than those between bare excitons.
The emergence of collective oscillations and synchronization is a widespread
phenomenon in complex systems. While widely studied in dynamical systems
theory, this phenomenon is not well understood in the context of
out-of-equilibrium phase transitions. Here we consider classical lattice
models, namely the Ising, the Blume-Capel and the Potts models, with a feedback
among the order and control parameters. With linear response theory we derive
low-dimensional dynamical systems for mean field cases that quantitatively
reproduce many-body stochastic simulations. In general, we find that the usual
equilibrium phase transitions are taken over by complex bifurcations where
self-oscillations emerge, a behavior that we illustrate by the feedback Landau
theory. For the case of the Ising model, we obtain that the bifurcation that
takes over the critical point is non-trivial in finite dimensions. We provide
numerical evidence that in 2D the most probable value of the amplitude follows
the Onsager law. We illustrate multi-stability for the case of discontinuously
emerging oscillations in the Blume-Capel model, whose tricritical point is
substituted by the Bautin bifurcation. For the Potts model with q = 3 colors we
highlight the appearance of two mirror stable limit cycles at a bifurcation
line and characterize the onset of chaotic oscillations that emerge at low
temperature through either the Feigenbaum cascade of period doubling or the
Aifraimovich-Shilnikov scenario of a torus destruction. We show that entropy
production singularities as a function of the temperature correspond to change
in the spectrum of Lyapunov exponents. Our results show that mean-field
behaviour can be described by the bifurcation theory of low-dimensional
dynamical systems, which paves the way for the definition of universality
classes of collective oscillations.
We propose and analyze the performance of terahertz (THz) room-temperature
bolometric detectors based on the graphene channel field-effect transistors
(GC-FET). These detectors comprise the gate barrier layer (BL) composed of the
lateral hexagonal-Boron Nitride black-Phosphorus/ hexagonal-Boron Nitride
(h-BN/b-P/h-BN) structure. The main part of the GC is encapsulated in h-BN,
whereas a short section of the GC is sandwiched between the b-P gate BL and the
h-BN bottom layer. The b-P gate BL serves as the window for the electron
thermionic current from the GC. The electron mobility in the GC section
encapsulated in h-BN can be fairly large. This might enable a strong resonant
plasmonic response of the GC-FET detectors despite relatively lower electron
mobility in the GC section covered by the b-P window BL. The narrow b-P window
diminishes the Peltier cooling and enhances the detector performance. The
proposed device structure and its operation principle promote elevated values
of the room-temperature GC-FET THz detector responsivity and other
characteristics, especially at the plasmonic resonances.
The van der Waals antiferromagnetic topological insulator MnBi$_2$Te$_4$
represents a promising platform for exploring the layer-dependent magnetism and
topological states of matter. Despite the realization of several quantized
phenomena, such as the quantum anomalous Hall effect and the axion insulator
state, the recently observed discrepancies between magnetic and transport
properties have aroused controversies concerning the topological nature of
MnBi$_2$Te$_4$ in the ground state. Here, we demonstrate the existence of two
distinct types of zero Hall phenomena in few-layer MnBi$_2$Te$_4$. In addition
to the robust zero Hall plateau associated with the axion insulator state, an
unexpected zero Hall phenomenon also occurs in some odd-number-septuple layer
devices. Importantly, a statistical survey of the optical contrast in more than
200 MnBi$_2$Te$_4$ reveals that such accidental zero Hall phenomenon arises
from the reduction of effective thickness during fabrication process, a factor
that was rarely noticed in previous studies of 2D materials. Our finding not
only resolves the controversies on the relation between magnetism and anomalous
Hall effect in MnBi$_2$Te$_4$, but also highlights the critical issues
concerning the fabrication and characterization of devices based on 2D
materials.
This paper provides a variational treatment of the effect of external charges
on the free charges in an infinite free-standing graphene sheet within the
Thomas-Fermi theory. We establish existence, uniqueness and regularity of the
energy minimizers corresponding to the free charge densities that screen the
effect of an external electrostatic potential at the neutrality point. For the
potential due to one or several off-layer point charges, we also prove
positivity and a precise universal asymptotic decay rate for the screening
charge density, as well as an exact charge cancellation by the graphene sheet.
We also treat a simpler case of the non-zero background charge density and
establish similar results in that case.
Altermagnets are an emerging third elementary class of magnets. Unlike
ferromagnets, their distinct crystal symmetries inhibit magnetization while,
unlike antiferromagnets, they promote strong spin polarization in the band
structure. The corresponding unconventional mechanism of timereversal symmetry
breaking without magnetization in the electronic spectra has been regarded as a
primary signature of altermagnetism, but has not been experimentally visualized
to date. We directly observe strong time-reversal symmetry breaking in the band
structure of altermagnetic RuO$_2$ by detecting magnetic circular dichroism in
angle-resolved photoemission spectra. Our experimental results, supported by ab
initio calculations, establish the microscopic electronic-structure basis for a
family of novel phenomena and functionalities in fields ranging from
topological matter to spintronics, that are based on the unconventional
time-reversal symmetry breaking in altermagnets.
While topological phases have been extensively studied in amorphous systems
in recent years, it remains unclear whether the random nature of amorphous
materials can give rise to higher-order topological phases that have no
crystalline counterparts. Here we theoretically demonstrate the existence of
higher-order topological insulators in two-dimensional amorphous systems that
can host more than six corner modes, such as eight or twelve corner modes.
Although individual sample configuration lacks crystalline symmetry, we find
that an ensemble of all configurations exhibits an average crystalline symmetry
that provides protection for the new topological phases. To characterize the
topological phases, we construct two topological invariants. Even though the
bulk energy gap in the topological phase vanishes in the thermodynamic limit,
we show that the bulk states near zero energy are localized, as supported by
the level-spacing statistics. Our findings open an avenue for exploring average
symmetry protected higher-order topological phases in amorphous systems without
crystalline counterparts.
Exciton-polaritons are bosonic-like elementary excitations in semiconductors,
which have been recently shown to display large occupancy of topologically
protected polariton bound states in the continuum in suitably engineered
photonic lattices [Nature {\bf 605}, 447 (2022)], compatible with the
definition of polariton condensation. However, a full theoretical description
of such condensation mechanism that is based on a non equilibrium
Gross-Pitaevskii formulation is still missing. Given that the latter is well
known to account for polariton condensation in conventional semiconductor
microcavities, here we report on its multi-mode generalization, showing that it
allows to fully interpret the recent experimental findings in patterned
photonic lattices, including emission characteristics and condensation
thresholds. Beyond that, it is shown that the polariton condensation in these
systems is actually the result of an interplay between negative mass
confinement of polariton eigenstates (e.g., due to the photonic gap originated
from the periodic pattern in plane) and polariton losses. We are then able to
show that polariton condensation can also occur in gap-confined bright modes,
i.e., coupling of QW excitons to a dark photonic mode is not necessarily
required to achieve a macroscopic occupation with low population threshold.
Generation of circularly-polarized high-harmonics with the same helicity to
all orders is indispensable for chiral-sensitive spectroscopy with attosecond
temporal resolution. Solid-state samples have added a valuable asset in
controlling the polarization of emitted harmonics. However, maintaining the
identical helicity of the emitted harmonics to all orders is a daunting task.
In this work, we demonstrate a robust recipe for efficient generation of
circularly-polarized harmonics with the same helicity. For this purpose, a
nontrivial tailored driving field, consisting of two co-rotating laser pulses
with frequencies $\omega$ and $2\omega$, is utilized to generate harmonics from
graphene. The Lissajous figure of the total driving pulse exhibits an absence
of the rotational symmetry, which imposes no constraint on the helicity of the
emitted harmonics. Our approach to generating circularly-polarized harmonics
with the same helicity is robust against various perturbations in the setup,
such as variation in the subcycle phase difference or the intensity ratio of
the $\omega$ and $2\omega$ pulses, as rotational symmetry of the total driving
pulse remains absent. Our approach is expected to be equally applicable to
other two-dimensional materials, among others, transition-metal dichalcogenides
and hexagonal boron nitride as our approach is based on absence of the
rotational symmetry of the driving pulse. Our work paves the way for
establishing compact solid-state chiral-XUV sources, opening a new realm for
chiral light-matter interaction on its intrinsic timescale.
Higher-order Weyl semimetals are a family of recently predicted topological
phases simultaneously showcasing unconventional properties derived from Weyl
points, such as chiral anomaly, and multidimensional topological phenomena
originating from higher-order topology. The higher-order Weyl semimetal phases,
with their higher-order topology arising from quantized dipole or quadrupole
bulk polarizations, have been demonstrated in phononics and circuits. Here, we
experimentally discover a class of higher-order Weyl semimetal phase in a
three-dimensional photonic crystal (PhC), exhibiting the concurrence of the
surface and hinge Fermi arcs from the nonzero Chern number and the nontrivial
generalized real Chern number, respectively, coined a real higher-order Weyl
PhC. Notably, the projected two-dimensional subsystem with kz = 0 is a real
Chern insulator, belonging to the Stiefel-Whitney class with real Bloch
wavefunctions, which is distinguished fundamentally from the Chern class with
complex Bloch wavefunctions. Our work offers an ideal photonic platform for
exploring potential applications and material properties associated with the
higher-order Weyl points and the Stiefel-Whitney class of topological phases.
Studying the effect of mechanical perturbations on granular systems is
crucial for understanding soil stability, avalanches, and earthquakes. We
investigate a granular system as a laboratory proxy for fault gouge. When
subjected to a slow shear, granular materials typically exhibit a stress
overshoot before reaching a steady state. We find that short seismic pulses can
reset a granular system flowing in steady state so that the stress overshoot is
regenerated. This new feature is shown to determine the stability of the
granular system under different applied stresses in the wake of a perturbation
pulse and the resulting dynamics when it fails. Using an analytical
aging-rejuvenation model for describing the overshoot response, we show that
our laboratory-derived theoretical framework, can quantitatively explain data
from two fault slip events triggered by seismic waves.
A natural criticism of the universal optimal protocol of the irreversible
work found in the context of weak processes is its experimental difficulty to
be implementable due to its singular part. In this work, I propose as a partial
solution to this problem its continuous linear part as an acceptable
near-optimal protocol. This is based on the analysis of several examples of the
error committed to approximating the solution extended until its second order
in its continuous linear part. The result seems to be universal: depending
mainly on the ratio between switching time and waiting time $\tau/\tau_w$, the
error for sudden and slowly-varying processes is less than $1\%$, while for
$\tau\approx\tau_w$ it has a peak with an upper bound around $8\%$. Although
implementing Dirac deltas could be an experimental challenge, I present also
the error including those functions, where the results of these new
near-optimal protocols become slightly better.
To study gapped phases of $4$d gauge theories, we introduce the temporal
gauging of $\mathbb{Z}_N$ $1$-form symmetry in $4$d quantum field theories
(QFTs), thereby defining effective $3$d QFTs with
$\widetilde{\mathbb{Z}}_N\times \mathbb{Z}_N$ $1$-form symmetry. In this way,
spatial fundamental Wilson and 't Hooft loops are simultaneously genuine line
operators. Assuming a mass gap and Lorentz invariant vacuum of the $4$d QFT,
the $\widetilde{\mathbb{Z}}_N\times \mathbb{Z}_N$ symmetry must be
spontaneously broken to an order-$N$ subgroup $H$, and we can classify the $4$d
gapped phases by specifying $H$. This establishes the $1$-to-$1$ correspondence
between the two classification schemes for gapped phases of $4$d gauge
theories: One is the conventional Wilson-'t Hooft classification, and the other
is the modern classification using the spontaneous breaking of $4$d $1$-form
symmetry enriched with symmetry-protected topological states.
Twisted homobilayer transition metal dichalcogenide (TMD) offer a versatile
platform for exploring band topology, correlated phases, and magnetic orders.
We study the correlated phases in twisted TMD homobilayers and their low energy
collective excitations, focusing on the effect of band topology on magnetism
and thermal stability. From Hartree-Fock theory of the continuum model, we
identify several magnetic and topological phases. By tuning the displacement
field, we find two phase transitions involving a change in topology and
magnetism respectively. We analyze the magnon spectrum, revealing the crucial
role of band topology in stabilizing 2D ferromagnetism by amplifying easy-axis
magnetic anisotropy, resulting in a large magnon gap of up to 7meV. As the
magnon gap is directly tied to the stability of the magnetic phase to thermal
fluctuations, our findings have several important experimental implications.
This theoretical research is devoted to study topological phase transitions
in a two-dimensional honeycomb ferromagnetic lattice with unequal
Dzyaloshinskii-Moriya interactions for the two sublattices. With the help of a
first-order Green function formalism, we analyze the influence of magnon-magnon
interaction on the magnon band topology. It is found that the existence of the
antichiral Dzyaloshinskii-Moriya interaction can led to a tilting of the
renormalized magnon bands near the Dirac momenta. Then, the renormalized magnon
band gaps at Dirac points have different widths. Through changing the
temperature, we can observe the renormalized magnon band gap closing-reopening
phenomenon, which corresponds to the topological phase transition. Our results
show that the critical temperature of the topological phase transition is
related to the strength of the antichiral Dzyaloshinskii-Moriya interaction.
Recent experiments have produced evidence for fractional quantum anomalous
Hall (FQAH) states at zero magnetic field in the semiconductor moir\'e
superlattice system $t$MoTe$_2$. Here we argue that a composite fermion
description, already a unifying framework for the phenomenology of 2d electron
gases at high magnetic fields, provides a similarly powerful perspective in
this new context, despite the absence of a magnetic field. To this end, we
present exact diagonalization evidence for composite Fermi liquid states at
zero magnetic field in $t$MoTe$_2$, at fillings $n=\frac{1}{2}$ and
$n=\frac{3}{4}$. We dub these non-Fermi liquid metals anomalous composite Fermi
liquids (ACFLs), and we argue that they play a central organizing role in the
FQAH phase diagram. We proceed to develop a long wavelength theory for this
ACFL state, which offers concrete experimental predictions upon doping the
composite Fermi sea, including a Jain sequence of FQAH states and a new type of
commensurability oscillations originating from the superlattice potential
intrinsic to the system.
We report on the highly efficient spin-orbit torque (SOT) generation in
epitaxial SrIrO$_{3}$(SIO), which is grown on an orthorhombic DyScO$_{3}$(110)
substrate. By conducting harmonic Hall measurement in
Co$_{20}$Fe$_{60}$B$_{20}$ (CoFeB)/SIO bilayers, we characterize two kinds of
the SOTs, i.e., dampinglike (DL) and fieldlike ones to find that the former is
much larger than the latter. By comparison with the Pt control sample with the
same CoFeB thickness, the observed DL SOT efficiency $\xi$$_{DL}$ of SIO
($\sim$0.32) is three times higher than that of Pt ($\sim$0.093). The
$\xi$$_{DL}$ is nearly constant as a function of the CoFeB thickness,
suggesting that the SIO plays a crucial role in the large SOT generation. These
results on the CoFeB/SIO bilayers highlight that the epitaxial SIO is promising
for low-current and reliable spin-orbit torque-controlled devices.
Breaking parity (P) symmetry in C6 symmetric crystals is a common routine to
implement a valley-topological phase. At an interface between two crystals of
opposite valley phases, the so-called valley topological edge states emerge,
and they have been proven useful for wave transport with robustness against 120
degree bending and a certain level of disorder. However, whether these
attractive transport features are bound with the valley topology or due to
topological-irrelevant mechanisms remains unclear. In this letter, we discuss
this question by examining transport properties of photonic edge states with
varied degrees of the P-breaking that tune the valley topology, and reveal that
the edge states preserve their transport robustness insensitive to the topology
even when the P-symmetry is recovered. Instead, a unique modal character of the
edge states--with localized momentum hotspots around high-symmetric K (K')
points--is recognized to play the key role, which only concerns the existence
of the valleys in the bulk band structures, and has no special requirement on
the topology. The "non-topological" notion of valley edge states is introduced
to conceptualize this modal character, leading to a coherent understanding of
bending immunity in a range of edge modes implemented in C3 symmetric
crystals--such as valley topological edge states, topological edge states of 2D
Zak phase, topological-trivial edge states and so on--, and to new designs in
general rhombic lattices--with exemplified bending angle as large as 150
degree.
We study the quantum valley Hall effect and related domain wall modes in
twisted bilayer graphene at a large commensurate angle. Due to the quantum
valley and sub-valley Hall effect, a small deviation from the commensurate
angle generates two-dimensional conducting network patterns composed of
one-dimensional domain wall conducting channels, which can induce non-Fermi
liquid transport behavior within an accessible temperature range. The domain
wall modes can be manipulated by using the layer shifting and external electric
fields which, in turn, leads to the sub-valley Haldane and Semenoff masses on
the domain wall modes. The large-angle twisted bilayer graphene and related
materials can be a new setup to harness the quantum valley and sub-valley Hall
effect with enhanced tunability.
Interactions between the different degrees of freedom form the basis of many
manifestations of intriguing physics in condensed matter. In this respect,
quantifying the dynamics of normal modes that themselves arise from these
interactions and how they interact with other excitations is of central
importance. Of the different types of coupling that are often important,
spin-lattice coupling is relevant to several sub-fields of condensed matter
physics; examples include spintronics, high-TC superconductivity, and
topological materials. While theories of materials where spin-lattice coupling
is relevant can sometimes be used to infer the magnitude and character of this
interaction, experimental approaches that can directly measure it are rare and
incomplete. Here we use time-resolved X-ray diffraction to directly access the
spin-lattice coupling by measuring both ultrafast atomic motion and the
associated spin dynamics following the excitation of a coherent electromagnon
by an intense THz pulse in a multiferroic hexaferrite. Comparing the dynamics
of the two different components, one striking outcome is the different phase
shifts relative to the driving field. This phase shift provides insight into
the excitation process of such a coupled mode. This direct observation of
combined lattice and magnetization dynamics paves the way to access the
mode-selective spin-lattice coupling strength, which remains a missing
fundamental parameter for ultrafast control of magnetism and is relevant to a
wide variety of correlated electron physics.
Electrons in two-dimensional materials possess an additional quantum
attribute, the valley pseudospin, labelled as $\mathbf{K}$ and
$\mathbf{K}^{\prime}$ -- analogous to the spin up and spin down. The majority
of research to achieve valley-selective excitations in valleytronics depends on
resonant circularly-polarised light with a given helicity. Not only acquiring
valley-selective electron excitation but also switching the excitation from one
valley to another is quintessential for bringing valleytronics-based
technologies in reality. Present work introduces a coherent control protocol to
initiate valley-selective excitation, de-excitation, and switch the excitation
from one valley to another on the fly within tens of femtoseconds -- a
timescale faster than any valley decoherence time. Our protocol is equally
applicable to {\it both} gapped and gapless two-dimensional materials.
Monolayer graphene and molybdenum disulfide are used to test the universality.
Moreover, the protocol is robust as it is insensitive to significant parameters
of the protocol, such as dephasing times, wavelengths, and time delays of the
laser pulses. Present work goes beyond the existing paradigm of valleytronics,
and opens a new realm of valley switch at PetaHertz rate.
Interfacing magnetism with superconductivity gives rise to a wonderful
playground for intertwining key degrees of freedom: Cooper pairs, spin, charge,
and spin-orbit interaction, from which emerge a wealth of exciting phenomena,
fundamental in the nascent field of superconducting spinorbitronics and
topological quantum technologies. Magnetic exchange interactions (MEI), being
isotropic or chiral such as the Dzyaloshinskii-Moriya interactions (DMI), are
vital in establishing the magnetic behavior at these interfaces as well as in
dictating not only complex transport phenomena, but also the manifestation of
topologically trivial or non-trivial objects as skyrmions, spirals,
Yu-Shiba-Rusinov states and Majorana modes. Here, we propose a methodology
enabling the extraction of the tensor of MEI from electronic structure
simulations accounting for superconductivity. We apply our scheme to the case
of a Mn layer deposited on Nb(110) surface and explore proximity-induced impact
on the MEI. Tuning the superconducting order parameter, we unveil potential
change of the magnetic order accompanied with chirality switching. Owing to its
simple formulation, our methodology can be readily implemented in
state-of-the-art frameworks capable of tackling superconductivity and
magnetism. Our findings opens intriguing exploration paths, where chirality and
magnetism can be engineered depending on the conducting nature of
magneto-superconducting interfaces. We thus foresee implications in the
simulations and prediction of topological superconducting bits as well as in
cryogenic superconducting hybrid devices involving magnetic units.
We prove that in the chiral limit of the Bistritzer-MacDonald Hamiltonian,
there exist magic angles at which the Hamiltonian exhibits flat bands of
multiplicity four instead of two. We analyze the structure of the Bloch
functions associated with the four bands, the corresponding Chern number, and
show that there exist infinitely many degenerate magic angles for a generic
choice of tunnelling potentials.
In order to study the novel gas detection or sensing applications of gallium
nitride monolayer (GaN-ML), we mainly focused on the structural, energetic,
electronic and magnetic properties of toxic gas molecules (CO, NO) adsorbed on
pristine, single vacancy (N-vacancy, Ga-vacancy) defected, and metals (Al, Fe,
Pd and Pt) doped GaN-ML using density functional theory (DFT-D2 method) in this
work. The calculations demonstrate that pristine GaN-ML is extremely
insensitive to CO and NO together with the existence of a weak physisorption
nature due to small adsorption energy, charge transfer, and long adsorption
distance. It is found that both N-vacancy defected GaN-ML and Fe-doped GaN-ML
can significantly increase the adsorption energy and charge transfer for CO.
The CO adsorption induces the metallic characteristics of N-vacancy GaN-ML to
be converted to the half-metallic characteristics together with 100% spin
polarization, and it also drastically changes the magnetic moment, implying
that N-vacancy GaN-ML exhibits excellent sensitivity to CO. However, Fe-doped
GaN-ML is not conducive to CO detection. Moreover, N-vacancy defected and
Pt-doped GaN-ML greatly improve the adsorption ability for NO compared to other
substrates, and the presence of stronger orbital hybridization suggests that
the interaction between them is chemisorption. Therefore, N-vacancy defected
GaN-ML and Pt-doped GaN-ML can serve as potential materials in future NO
sensing devices.
Gauging a finite Abelian normal subgroup $\Gamma$ of a nonanomalous 0-form
symmetry $G$ of a theory in $(d+1)$D spacetime can yield an unconventional
critical point if the original theory has a continuous transition where
$\Gamma$ is completely spontaneously broken and if $G$ is a nontrivial
extension of $G/\Gamma$ by $\Gamma$. The gauged theory has symmetry $G/\Gamma
\times \hat{\Gamma}^{(d-1)}$, where $\hat{\Gamma}^{(d-1)}$ is the $(d-1)$-form
dual symmetry of $\Gamma$, and a 't Hooft anomaly between them. Thus it can be
viewed as a boundary of a topological phase protected by $G/\Gamma \times
\hat{\Gamma}^{(d-1)}$. The ordinary critical point, upon gauging, is mapped to
a deconfined quantum critical point between two ordinary symmetry-breaking
phases ($d =1$) or an unconventional quantum critical point between an ordinary
symmetry-breaking phase and a topologically ordered phase ($d\ge 2$) associated
with $G/\Gamma$ and $\hat{\Gamma}^{(d-1)}$, respectively. Order parameters and
disorder parameters, before and after gauging, can be directly related. As a
concrete example, we gauge the $\mathbb{z}_2$ subgroup of $\mathbb{z}_4$
symmetry of a 4-state clock model on a 1D lattice and a 2D square lattice.
Since the symmetry of the clock model contains $D_8$, the dihedral group of
order 8, we also analyze the anomaly structure which is similar to that in the
compactified $SU(2)$ gauge theory with $\theta =\pi$ in $(3+1)$D and its mixed
gauge theory. The general case is also discussed.
The idea of creating magnetically controllable colloids whose rheological
properties can be finely tuned on the nano- or micro-scale has caused a lot of
experimental and theoretical effort. The latter resulted in systems whose
building blocks are ranging between single magnetic nanoparticles to complexes
of such nanoparticles bound together by various mechanisms. The binding can be
either chemical or physical, reversible or not. One way to create a system that
is physically bound is to let the precrosslinked supracolloidal magnetic
polymers (SMPs) to cluster due to both magnetic and Van-der-Waals-type forces.
The topology of the SMPs in this case can be used to tune both magnetic and
rheological properties of the resulting clusters as we show in this work. We
employ Molecular Dynamics computer simulations coupled with explicit solvent
modelled by Lattice-Boltzmann method in order to model the behaviour of the
clusters formed by chains, rings, X- and Y-shaped SMPs in a shear flow with
externally applied magnetic field. We find that the shear stabilises the shape
of the clusters not letting them extend in the direction of the field and
disintegrate. The clusters that show the highest response to an applied field
and higher shape stability are those made of Y- and X-like SMPs.
We investigate the interaction between a monolayer of WS2 and a chiral
plasmonic metasurface. WS2 possesses valley excitons that selectively couple
with one-handed circularly polarised light. At the same time, the chiral
plasmonic metasurface exhibits spin-momentum locking, leading to a robust
polarisation response in the far field. Using a scattering formalism based on
the coupled mode method, we analyse various optical properties of the WS2
monolayer. Specifically, we demonstrate the generation of circular dichroism in
the transition metal dichalcogenide (TMD) by harnessing the excitation of
surface plasmon polaritons (SPPs) in the metasurface. Moreover, we observe the
emergence of other guided modes, opening up exciting possibilities for further
exploration in TMD-based devices.
The current work proposes a novel scheme for developing a light-activated
non-filamentary memristor device by fabricating an Au-nanoparticle embedded
HfO$_2$-bilayer/p-Si MOS structure. Under illumination, the electrons in such
embedded Au-nanoparticles are excited from d-level to quantized s-p level and
are swept out on application of an appropriate gate bias, leaving behind the
holes without recombination. Such photogenerated holes are confined within the
nanoparticles and thus screen the external field to lead to a memristive effect
in the device. The phenomenon is experimentally observed in the fabricated
Pt/HfO$_2$-(layer-II)/Au-NPs/HfO$_2$-(layer-I)/p-Si devices, where such
memristive effect is activated/deactivated by light pulses. The memory window
and high-to-low resistance ratio of the device are obtained to be ~1 V and ~10,
respectively, which suggest the performance of a standard state-of-the-art
memristor. Further, the present device offers a voltage-sweep-endurance up to
at least 150 cycles and the memory retention up to ~10,000 s. Such a device
concept can be extended for a combination of different nanoparticles with
various dimensions and dielectric layers to optimize their memristive effect
for achieving CMOS-compatible memory devices with superior reliability.
As one of the most intriguing states of matter, the chiral spin liquid (CSL)
has attracted much scientific interest. On one hand, its existence and
mechanism in crystalline strongly correlated systems remain hotly debated. On
the other hand, strong correlation driven emergent phenomena can be realized in
twisted transition-metal dichalcogenide bilayers with a tremendously tunable
large length scale providing a new platform for the emergence of CSLs. We focus
on a strongly correlated model relevant to heterobilayer
$\textrm{WSe}_{2}/\textrm{MoSe}_{2}$ and investigate the Mott insulating phase
at half filling under an out-of-plane magnetic field. Considering both its
orbital and spin Zeeman effects we identify three conventionally ordered phases
including a $120^{\circ}$ Ne\'{e}l phase, a stripe phase and an up-up-down
phase. For intermediate fields an emergent quantum spin liquid phase is
identified with partial spin polarization. We further characterize the
topological nature of the quantum spin liquid as the $\nu$ = 1/2 Laughlin
chiral spin liquid through the topological entanglement spectrum and quantized
spin pumping under spin flux insertion. In addition, we map out the quantum
phase diagram for different twisted angles in an experimentally accessible
parameter regime.
Recent experiments evidence the direct observation of spin waves in chromium
trihalides and a gap at the Dirac points of the magnon dispersion in bulk
CrI$_3$. However, the topological origin of this feature remains unclear and
its emergence at the 2D limit has not yet been proven experimentally. Herein,
we perform a fully self-consistent ab initio analysis that supports the
presence of topological magnons in chromium trihalides monolayers. Our results
confirm the existence of a gap around the K high-symmetry point in the linear
magnon dispersion of CrI$_3$, which originates as a direct consequence of
intralayer Dzyaloshinskii-Moriya (DM) interaction. In addition, our orbital
resolved analysis reveals the microscopic mechanisms that can be exploited
using strain engineering to increase the strength of the DM interaction and
thus control the gap size in CrI$_3$. This paves the way to the further
development of this family of materials as building-blocks for topological
magnonics at the limit of miniaturization.
The detection of the Majorana bound states (MBSs) is a central issue in the
current investigation of the topological superconductors, and the topological
Josephson junction is an important system for resolving this issue. In this
work, we introduce an external quantum dot (QD) to Majorana Josephson junctions
(MJJs), and study the parity flipping of the junction induced by the coupling
between the QD and the MBSs. We demonstrate Landau-Zener (LZ) transitions
between opposite Majorana parity states when the energy level of the QD is
modulated. The resulted parity flipping processes exhibit voltage signals
across the junction. In the presence of a periodic modulation on the QD level,
we show Landau-Zener-St\"{u}ckelberg (LZS) interference on the parity states.
We demonstrate distinctive interference patterns at distinct driving
frequencies. These results can be used as signals for detecting the existence
of the MBSs.
The phenomenon of non-reciprocal critical current in a Josephson device,
termed the Josephson diode effect, has garnered much recent interest.
Realization of the diode effect requires inversion symmetry breaking, typically
obtained by spin-orbit interactions. Here we report observation of the
Josephson diode effect in a three-terminal Josephson device based upon an InAs
quantum well two-dimensional electron gas proximitized by an epitaxial aluminum
superconducting layer. We demonstrate that the diode efficiency in our devices
can be tuned by a small out-of-plane magnetic field or by electrostatic gating.
We show that the Josephson diode effect in these devices is a consequence of
the artificial realization of a current-phase relation that contains higher
harmonics. We also show nonlinear DC intermodulation and simultaneous
two-signal rectification, enabled by the multi-terminal nature of the devices.
Furthermore, we show that the diode effect is an inherent property of
multi-terminal Josephson devices, establishing an immediately scalable approach
by which potential applications of the Josephson diode effect can be realized,
agnostic to the underlying material platform. These Josephson devices may also
serve as gate-tunable building blocks in designing topologically protected
qubits.
We propose a simple, robust protocol to prepare a low-energy state of an
arbitrary Hamiltonian on a quantum computer or programmable quantum simulator.
The protocol is inspired by the adiabatic demagnetization technique, used to
cool solid-state systems to extremely low temperatures. A fraction of the
qubits (or spins) is used to model a spin bath that is coupled to the system.
By an adiabatic ramp down of a simulated Zeeman field acting on the bath spins,
energy and entropy are extracted from the system. The bath spins are then
measured and reset to the polarized state, and the process is repeated until
convergence to a low-energy steady state is achieved. We demonstrate the
protocol via application to the quantum Ising model. We study the protocol's
performance in the presence of noise and show how the information from the
measurement of the bath spins can be used to monitor the cooling process. The
performance of the algorithm depends on the nature of the excitations of the
system; systems with non-local (topological) excitations are more difficult to
cool than those with local excitations. We explore the possible mitigation of
this problem by trapping topological excitations.
We study transport along interfaced edge segments of fractional quantum Hall
states hosting non-Abelian Majorana modes. With an incoherent model approach,
we compute, for edge segments based on Pfaffian, anti-Pfaffian, and
particle-hole-Pfaffian topological orders, thermal conductances, voltage biased
noise, and delta-$T$ noise. We determine how the thermal equilibration of edge
modes impacts these observables and identify the temperature scalings of
transitions between regimes of differently quantized thermal conductances. In
combination with recent experimental data, we use our results to estimate
thermal and charge equilibration lengths in real devices. We also propose an
experimental setup which permits measuring several transport observables for
interfaced fractional quantum Hall edges in a single device. It can, e.g., be
used to rule out edge reconstruction effects. In this context, we further point
out some subtleties in two-terminal thermal conductance measurements and how to
remedy them. Our findings are consistent with recent experimental results
pointing towards a particle-hole-Pfaffian topological order at filling
$\nu=5/2$ in GaAs/AlGaAs, and provide further means to pin-point the edge
structure at this filling and possibly also other exotic fractional quantum
Hall states.
We study heat transport in a Weyl semimetal with broken time-reversal
symmetry in the hydrodynamic regime. At the neutrality point, the longitudinal
heat conductivity is governed by the momentum relaxation (elastic) time, while
longitudinal electric conductivity is controlled by the inelastic scattering
time. In the hydrodynamic regime this leads to a large longitudinal Lorenz
ratio. As the chemical potential is tuned away from the neutrality point, the
longitudinal Lorenz ratio decreases because of suppression of the heat
conductivity by the Seebeck effect. The Seebeck effect (thermopower) and the
open circuit heat conductivity are intertwined with the electric conductivity.
The magnitude of Seebeck tensor is parametrically enhanced, compared to the
non-interacting model, in a wide parameter range. While the longitudinal
component of Seebeck response decreases with increasing electric anomalous Hall
conductivity $\sigma_{xy}$, the transverse component depends on $\sigma_{xy}$
in a non-monotonous way. Via its effect on the Seebeck response, large
$\sigma_{xy}$ enhances the longitudinal Lorenz ratio at a finite chemical
potential. At the neutrality point, the transverse heat conductivity is
determined by the Wiedemann-Franz law. Increasing the distance from the
neutrality point, the transverse heat conductivity is enhanced by the
transverse Seebeck effect and follows its non-monotonous dependence on
$\sigma_{xy}$.
Odd-frequency superconductivity is an exotic superconducting state in which
the symmetry of the gap function is odd in frequency. Here we show that an
inherent odd-frequency mode emerges dynamically under application of a Lorentz
transformation of the anomalous Green function with the general
frequency-dependent gap function. To see this, we consider a Dirac model with
quartic potential and perform a mean-field analysis to obtain a relativistic
Bogoliubov-de Gennes system. Solving the resulting Gor'kov equations yields
expressions for relativistic normal and anomalous Green functions. The form of
the relativistically invariant pairing term is chosen such that it reduces to
BCS form in the non-relativistic limit. We choose an ansatz for the gap
function in a particular frame which is even-frequency and analyze the effects
on the anomalous Green function under a boost into a relativistic frame. The
odd-frequency pairing emerges dynamically as a result of the boost. In the
boosted frame the order parameter contains terms which are both even and odd in
frequency. The relativistic correction to the anomalous Green function to first
order in the boost parameter is completely odd in frequency. This work provides
evidence that odd-frequency pairing may form intrinsically within relativistic
superconductors.
The nature of the bulk topological order of the 5/2 non-Abelian fractional
quantum Hall state and the steady-state of its edge are long-studied questions.
The most promising non-Abelian model bulk states are the Pfaffian (Pf),
anti-Pffafian (APf), and particle-hole symmetric Pfaffian (PHPf). Here, we
propose to employ a set of dc current-current correlations \emph{(electrical
shot noise)} in order to distinguish among the Pf, APf, and PHPf candidate
states, as well as to determine their edge thermal equilibration regimes: full
vs. partial. Using other tools, measurements of GaAs platforms have already
indicated consistency with the PHPf state. Our protocol, realizable with
available experimental tools, is based on fully electrical measurements.
Excitons in two-dimensional transition metal dichalcogenides have a valley
degree of freedom that can be optically accessed and manipulated for quantum
information processing. Here, we integrate MoS2 with achiral silicon disk array
metasurfaces to enhance and control valley-specific absorption and emission.
Through the coupling to the metasurface Mie modes, the intensity and lifetime
of the emission of neutral excitons, trions and defect bound excitons can be
enhanced, while the spectral shape can be modified. Additionally, we
demonstrate the symmetric enhancement of the degree-of-polarization (DOP) of
neutral exciton and trions via valley-resolved PL measurements, and find that
the DOP can be as high as 24% for exciton emission and 34% for trion emission
at 100K. These results can be understood by analyzing the near-field impact of
metasurface resonators on both the chiral absorption of MoS2 emitters as well
as the enhanced emission from the Purcell effect. Combining Si-compatible
photonic design with large-scale (mm-scale) 2D materials integration, our work
makes an important step towards on-chip valleytronic applications approaching
room-temperature operation.
In this work, we propose a modern view of the integer spin simple currents
which have played a central role in discrete torsion. We reintroduce them as
nonanomalous composite particles constructed from $Z_{N}$ parafermionic field
theories. These composite particles have an analogy with the Cooper pair in the
Bardeen-Cooper-Schrieffer theory and can be interpreted as a typical example of
anyon condensation. Based on these $Z_{N}$ anomaly free composite particles, we
propose a systematic construction of the cylinder partition function of $Z_{N}$
fractional quantum Hall effects (FQHEs). One can expect realizations of a class
of general topological ordered systems by breaking the bulk-edge correspondence
of the bosonic parts of these FQH models. We also give a brief overview of
various phenomena in contemporary condensed matter physics, such as $SU(N)$
Haldane conjecture, general gapless and gapped topological order with respect
to the quantum anomaly defined by charges of these simple currents and bulk and
boundary renormalization group flow. Moreover, we point out an analogy between
these FQHEs and 2d quantum gravities coupled to matter, and propose a $Z_{N}$
generalization of supersymmetry known as "fractional supersymmetry" in the
composite parafermionic theory and study its analogy with quark confinement.
Our analysis gives a simple but general understanding of the contemporary
physics of topological phases in the form of the partition functions derived
from the operator formalism.
We present a bilayer spin model that illuminates the mechanism of topological
anyon condensation transition. Our model harbors two distinct topological
phases, Kitaev spin liquid bilayer state and resonating valence bond (RVB)
state connected by a continuous transition. We show that the transition occurs
by anyon condensation, and the hardcore dimer constraint of the RVB state plays
a role of the order parameter. This model study offers an intuitive picture for
anyon condensation transition, and is broadly applicable to generic
tri-coordinated lattices preserving the emergence of the RVB state from the
Kitaev bilayer.
On performing a sequence of renormalisation group (RG) transformations on a
system of two-dimensional non-interacting Dirac fermions placed on a torus, we
demonstrate the emergence of an additional spatial dimension arising out of the
scaling of multipartite entanglement. The renormalisation of entanglement under
this flow exhibits a hierarchy across scales as well as number of parties.
Geometric measures defined in this emergent space, such as distances and
curvature, can be related to the RG beta function of the coupling $g$
responsible for the spectral gap. This establishes a holographic connection
between the spatial geometry of the emergent space in the bulk and the
entanglement properties of the quantum theory lying on its boundary. Depending
on the anomalous dimension of the coupling $g$, three classes of spaces
(bounded, unbounded and flat) are generated from the RG. We show that changing
from one class to another involves a topological transition. By minimising the
central charge of the conformal field theory describing the noninteracting
electrons under the RG flow, the RG transformations are shown to satisfy the
$c-$theorem of Zamolodchikov. This is shown to possess a dual within the
emergent geometric space, in the form of a convergence parameter that is
minimised at large distances. In the presence of an Aharonov-Bohm flux, the
entanglement gains a geometry-independent piece which is shown to be
topological, sensitive to changes in boundary conditions, and can be related to
the Luttinger volume of the system of electrons. In the presence of a strong
transverse magnetic field, the system becomes insulating and Luttinger's
theorem does not hold. We show instead that the entanglement contains a term
that can be related to the Chern numbers of the quantum Hall states. This
yields a relation between the topological invariants of the metallic and the
quantum Hall systems.
We propose and experimentally realize a class of quasi-one-dimensional
topological lattices whose unit cells are constructed by coupled multiple
identical resonators, with uniform hopping and inversion symmetry. In the
presence of path-induced effective zero hopping within the unit cells, the
systems are characterized by complete multimerization with degenerate $-1$
energy edge states for open boundary condition. Su-Schrieffer-Heeger subspaces
with fully dimerized limits corresponding to pairs of nontrivial flat bands are
derived from the Hilbert spaces. In particular, topological bound states in the
continuum (BICs) are inherently present in even multimer chains, manifested by
embedding the topological bound states into a continuous band assured by
bulk-boundary correspondence. Moreover, we experimentally demonstrate the
degenerate topological edge states and topological BICs in inductor-capacitor
circuits.
We argue that strain engineering is a powerful tool which may facilitate the
experimental realization and control of topological phases in laser-driven 2D
ferromagnetic systems. To this extent, we show that by applying a circularly
polarized laser field to a 2D honeycomb ferromagnet which is uniaxially
strained in either the zig-zag or armchair direction, it is possible to
generate a synthetic Dzyaloshinskii-Moriya interaction (DMI) tunable by the
intensity of the applied electric field, as well as by the magnitude of applied
strain. Such deformations enable transitions to phases with opposite sign of
Chern number, or to trivial phases. These are basic results that could pave the
way for the development of a new field of Strain Engineered Topological
Spintronics (SETS).
We first apply functional-integral approach to a multiband Hubbard model near
the critical pairing temperature, and derive a generic effective action that is
quartic in the fluctuations of the pairing order parameter. Then we consider
time-reversal-symmetric systems with uniform (i.e., at both low-momentum and
low-frequency) pairing fluctuations in a unit cell, and derive the
corresponding time-dependent Ginzburg-Landau (TDGL) equation. In addition to
the conventional intraband contribution that depends on the derivatives of the
Bloch bands, we show that the kinetic coefficients of the TDGL equation have a
geometric contribution that is controlled by both the quantum-metric tensor of
the underlying Bloch states and their band-resolved quantum-metric tensors.
Furthermore we show that thermodynamic properties such as London penetration
depth, GL coherence length, GL parameter and upper critical magnetic field have
an explicit dependence on quantum geometry.
Thermopower and the Lorentz number for an edge-free (Corbino) graphene disk
in the quantum Hall regime is calculated within the Landauer-B\"{u}ttiker
formalism. We find, by varying the electrochemical potential, that amplitude of
the Seebeck coefficient follows a modified Goldsmid-Sharp relation, in which
energy gap is identified with the interval between zero-th and first Landau
level in bulk graphene. Analogous relation for the Lorentz number is also
determined. Therefore, these thermoelectric properties are solely defined by
the magnetic field, temperature, the Fermi velocity in graphene, and
fundamental constants including the electrons charge, the Planck and Boltzmann
constants, being independent on the system geometric dimensions. This suggests
that the Corbino disk in graphene may operate as a thermoelectric thermometer,
allowing to determine small temperature difference between two reservoirs, if
mean temperature and magnetic field are known.
Interfacial coupling between graphene and other 2D materials can give rise to
intriguing physical phenomena. In particular, several theoretical studies
predict that the interplay between graphene and an antiferromagnetic insulator
could lead to the emergence of quantum anomalous Hall phases. However, such
phases have not been observed experimentally yet, and further experimental
studies are needed to reveal the interaction between graphene and
antiferromagnetic insulators. Here, we report the study in heterostructures
composed of graphene and the antiferromagnetic insulator MnPSe$_3$. It is found
that the MnPSe$_3$ has little impact on the quantum Hall phases apart from
doping graphene via interfacial charge transfer. However, the magnetic order
can contribute indirectly via process like Kondo effect, as evidenced by the
observed minimum in the temperature-resistance curve between 20-40 K, far below
the N\'eel temperature (70 K).
Atom-based quantum simulators have had tremendous success in tackling
challenging quantum many-body problems, owing to the precise and dynamical
control that they provide over the systems' parameters. They are, however,
often optimized to address a specific type of problems. Here, we present the
design and implementation of a $^6$Li-based quantum gas platform that provides
wide-ranging capabilities and is able to address a variety of quantum many-body
problems. Our two-chamber architecture relies on a robust and easy-to-implement
combination of gray molasses and optical transport from a laser-cooling chamber
to a glass cell with excellent optical access. There, we first create unitary
Fermi superfluids in a three-dimensional axially symmetric harmonic trap and
characterize them using in situ thermometry, reaching temperatures below 20 nK.
This allows us to enter the deep superfluid regime with samples of extreme
diluteness, where the interparticle spacing is sufficiently large for direct
single-atom imaging. Secondly, we generate optical lattice potentials with
triangular and honeycomb geometry in which we study diffraction of molecular
Bose-Einstein condensates, and show how going beyond the Kapitza-Dirac regime
allows us to unambiguously distinguish between the two geometries. With the
ability to probe quantum many-body physics in both discrete and continuous
space, and its suitability for bulk and single-atom imaging, our setup
represents an important step towards achieving a wide-scope quantum simulator.
Nominally identical materials exchange net electric charge during contact
through a mechanism that is still debated. `Mosaic models', in which surfaces
are presumed to consist of a random patchwork of microscopic donor/acceptor
sites, offer an appealing explanation for this phenomenon. However, recent
experiments have shown that global differences persist even between
same-material samples, which the standard mosaic framework does not account
for. Here, we expand the mosaic framework by incorporating global differences
in the densities of donor/acceptor sites. We develop an analytical model,
backed by numerical simulations, that smoothly connects the global and
deterministic charge transfer of different materials to the local and
stochastic mosaic picture normally associated with identical materials. Going
further, we extend our model to explain the effect of contact asymmetries
during sliding, providing a plausible explanation for reversal of charging sign
that has been observed experimentally.
We present effective field theories for dipole symmetric topological matters
that can be described by the Chern-Simons theory. Unlike most studies using
higher-rank gauge theory, we develop a framework with both U(1) and dipole
gauge fields. As a result, only the highest multipole symmetry can support the
't Hooft anomaly. We show that with appropriate point group symmetries, the
dipolar Chern-Simons theory can exist in any dimension and, moreover, the
bulk-edge correspondence can depend on the boundary. As two applications, we
draw an analogy between the dipole anomaly and the torsional anomaly and
generalize particle-vortex duality to dipole phase transitions. All of the
above are in the flat spacetime limit, but our framework is able to
systematically couple dipole symmetry to curved spacetime. Based on that, we
give a proposal about anomalous dipole hydrodynamics. Moreover, we show that
the fracton-elasticity duality arises naturally from a non-abelian Chern-Simons
theory in 3D.
The transport properties of matter have been widely investigated. In
particular, shear viscosity over a wide parameter space is crucial for various
applications, such as designing inertial confinement fusion (ICF) targets and
determining the Rayleigh-Taylor instability. In this work, an extended
random-walk shielding-potential viscosity model (RWSP-VM) [Phys. Rev. E 106,
014142] based on the statistics of random-walk ions and the Debye shielding
effect is proposed to elevate the temperature limit of RWSP-VM in evaluating
the shear viscosity of metals. In the extended model, we reconsider the
collision diameter that is introduced by hard-sphere concept, hence, it is
applicable in both warm and hot temperature regions (10^1-10^7 eV) rather than
the warm temperature region (10^1-10^2 eV) in which RWSP-VM is applicable. The
results of Be, Al, Fe, and U show that the extended model provides a systematic
way to calculate the shear viscosity of arbitrary metals at the densities from
about 0.1 to 10 times the normal density (the density at room temperature and 1
standard atmosphere). This work will help to develop viscosity model in wide
region when combined with our previous low temperature viscosity model [AIP
Adv. 11, 015043].

Date of feed: Tue, 06 Jun 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]+) **Twist-Induced Hyperbolic Shear Metasurfaces. (arXiv:2306.01775v1 [cond-mat.mes-hall])**

Simon Yves, Emanuele Galiffi, Xiang Ni, Enrico Maria Renzi, Andrea Alù

**Interaction induced AC-Stark shift of exciton-polaron resonances. (arXiv:2306.01778v1 [cond-mat.mes-hall])**

Takahiro Uto, Bertrand Evrard, Kenji Watanabe, Takashi Taniguchi, Martin Kroner, Atac Imamoglu

**Emergence of collective self-oscillations in minimal lattice models with feedback. (arXiv:2306.01823v1 [cond-mat.stat-mech])**

Dmitry Sinelschikov, Anna Poggialini, Maria Francesca Abbate, Daniele De Martino

**Terahertz bolometric detectors based on graphene field-effect transistors with the composite h-BN/black-P/h-BN gate layers using plasmonic resonances. (arXiv:2306.01975v1 [cond-mat.mes-hall])**

M. Ryzhii, V. Ryzhii, M. S. Shur, V. Mitin, C. Tang, T. Otsuji

**Two types of zero Hall phenomena in few-layer MnBi$_2$Te$_4$. (arXiv:2306.02046v1 [cond-mat.mes-hall])**

Yaoxin Li, Yongchao Wang, Zichen Lian, Hao Li, Zhiting Gao, Liangcai Xu, Huan Wang, Ruie Lu, Longfei Li, Yang Feng, Tianlong Xia, Chang Liu, Shuang Jia, Yang Wu, Jinsong Zhang, Chang Liu, Yayu Wang

**Thomas-Fermi theory of out-of-plane charge screening in graphene. (arXiv:2306.02103v1 [math.AP])**

Vitaly Moroz, Cyrill B. Muratov

**Observation of time-reversal symmetry breaking in the band structure of altermagnetic RuO$_2$. (arXiv:2306.02170v1 [cond-mat.mtrl-sci])**

O. Fedchenko, J. Minar, A. Akashdeep, S.W. D'Souza, D. Vasilyev, O. Tkach, L. Odenbreit, Q.L. Nguyen, D. Kutnyakhov, N. Wind, L. Wenthaus, M. Scholz, K. Rossnagel, M. Hoesch, M. Aeschlimann, B. Stadtmueller, M. Klaeui, G. Schoenhense, G. Jakob, T. Jungwirth, L. Smejkal, J. Sinova, H. J. Elmers

**Average Symmetry Protected Higher-order Topological Amorphous Insulators. (arXiv:2306.02246v1 [cond-mat.dis-nn])**

Yu-Liang Tao, Jiong-Hao Wang, Yong Xu

**Theory of exciton-polariton condensation in gap-confined eigenmodes. (arXiv:2306.02281v1 [cond-mat.other])**

Davide Nigro ad Dario Gerace

**Generation of Circularly-Polarised High-Harmonics with Identical Helicity in Two-Dimensional Materials. (arXiv:2306.02313v1 [physics.optics])**

Navdeep Rana, M. S. Mrudul, Gopal Dixit

**Real higher-order Weyl photonic crystal. (arXiv:2306.02321v1 [cond-mat.mes-hall])**

Yuang Pan, Chaoxi Cui, Qiaolu Chen, Fujia Chen, Li Zhang, Yudong Ren, Ning Han, Wenhao Li, Xinrui Li, Zhi-Ming Yu, Hongsheng Chen, Yihao Yang

**Perturbation-induced granular fluidization as a model for remote earthquake triggering. (arXiv:2306.02353v1 [cond-mat.soft])**

Kasra Farain, Daniel Bonn

**Performance of near-optimal protocols in weak processes. (arXiv:2306.02483v1 [cond-mat.stat-mech])**

Pierre Nazé

**Study of gapped phases of 4d gauge theories using temporal gauging of the $\mathbb{Z}_N$ 1-form symmetry. (arXiv:2306.02485v1 [hep-th])**

Mendel Nguyen, Yuya Tanizaki, Mithat Ünsal

**Topological magnets and magnons in twisted bilayer MoTe$_2$ and WSe$_2$. (arXiv:2306.02501v1 [cond-mat.str-el])**

Taige Wang, Trithep Devakul, Michael P. Zaletel, Liang Fu

**Topological phase transitions in a honeycomb ferromagnet with unequal Dzyaloshinskii-Moriya interactions. (arXiv:2306.02505v1 [cond-mat.other])**

Heng Zhu, Hongchao Shi, Zhengguo Tang, Bing Tang

**Zero-field composite Fermi liquid in twisted semiconductor bilayers. (arXiv:2306.02513v1 [cond-mat.mes-hall])**

Hart Goldman, Aidan P. Reddy, Nisarga Paul, Liang Fu

**Spin-orbit torque generation in bilayers composed of CoFeB and epitaxial SrIrO$_{3}$ grown on an orthorhombic DyScO$_{3}$ substrate. (arXiv:2306.02567v1 [cond-mat.mtrl-sci])**

Sosuke Hori, Kohei Ueda, Takanori Kida, Masayuki Hagiwara, Jobu Matsuno

**A Non-topological Extension of Bending-immune Valley Topological Edge States. (arXiv:2306.02633v1 [physics.optics])**

Tianyuan Liu, Wei Yan, Min Qiu

**Quantum Valley and Sub-valley Hall Effect in the Large Angle Twisted Bilayer Graphene. (arXiv:2306.02655v1 [cond-mat.mes-hall])**

Chiranjit Mondal, Rasoul Ghadimi, Bohm-Jung Yang

**Non-equilibrium dynamics of spin-lattice coupling. (arXiv:2306.02676v1 [cond-mat.str-el])**

Hiroki Ueda, Roman Mankowsky, Eugenio Paris, Mathias Sander, Yunpei Deng, Biaolong Liu, Ludmila Leroy, Abhishek Nag, Elizabeth Skoropata, Chennan Wang Victor Ukleev, Gérard Sylvester Perren, Janine Dössegger, Sabina Gurung, Elsa Abreu, Matteo Savoini, Tsuyoshi Kimura, Luc Patthey, Elia Razzoli, Henrik Till Lemke, Steven Lee Johnson, Urs Staub

**All-Optical Ultrafast Valley Switching in Two-Dimensional Materials. (arXiv:2306.02856v1 [physics.optics])**

Navdeep Rana, Gopal Dixit

**Magnetic exchange interactions at the proximity of a superconductor. (arXiv:2306.02906v1 [cond-mat.supr-con])**

Uriel Allan Aceves Rodríguez, Filipe Souza Mendes Guimarães, Sascha Brinker, Samir Lounis

**Degenerate flat bands in twisted bilayer graphene. (arXiv:2306.02909v1 [math-ph])**

Simon Becker, Tristan Humbert, Maciej Zworski

**Adsorption of CO and NO molecules on pristine, vacancy defected and doped graphene-like GaN monolayer: A first-principles study. (arXiv:2306.02915v1 [cond-mat.mtrl-sci])**

Han-Fei Li, Si-Qi Li, Guo-Xiang Chen

**Boundary criticality via gauging finite subgroups: a case study on the clock model. (arXiv:2306.02976v1 [cond-mat.str-el])**

Lei Su

**Stockmayer supracolloidal magnetic polymers under the influence of an applied magnetic field and a shear flow. (arXiv:2306.03005v1 [cond-mat.soft])**

Ivan S. Novikau, Vladimir V. Zverev, Ekaterina V. Novak, Sofia S. Kantorovich

**Circular dichroism induction in WS2 by a chiral plasmonic metasurface. (arXiv:2306.03028v1 [physics.optics])**

Fernando Lorén, Cyriaque Genet, Luis Martín-Moreno

**Light-activated memristor by Au-nanoparticle embedded HfO$_2$-bilayer/p-Si MOS device. (arXiv:2306.03044v1 [physics.app-ph])**

Ankita Sengupta, Basudev Nag Chowdhury, Bodhishatwa Roy, Biswarup Satpati, Satyaban Bhunia, Sanatan Chattopadhyay

**Magnetic field-induced partially polarized chiral spin liquid in a transition-metal dichalcogenide Moir\'e system. (arXiv:2306.03056v1 [cond-mat.str-el])**

Yixuan Huang, D. N. Sheng, Jian-Xin Zhu

**Strain engineering of topological magnons in chromium trihalides from first-principles. (arXiv:2104.03023v2 [cond-mat.mtrl-sci] UPDATED)**

Dorye L. Esteras, José J. Baldoví

**Parity flipping mediated by a quantum dot in Majorana Josephson junctions. (arXiv:2203.03671v2 [cond-mat.mes-hall] UPDATED)**

Shanbo Chow, Zhi Wang, Dao-Xin Yao

**Gate-tunable Superconducting Diode Effect in a Three-terminal Josephson Device. (arXiv:2206.08471v4 [cond-mat.mes-hall] UPDATED)**

Mohit Gupta, Gino V. Graziano, Mihir Pendharkar, Jason T. Dong, Connor P. Dempsey, Chris Palmstrøm, Vlad S. Pribiag

**Programmable adiabatic demagnetization for systems with trivial and topological excitations. (arXiv:2210.17256v3 [quant-ph] UPDATED)**

Anne Matthies, Mark Rudner, Achim Rosch, Erez Berg

**Thermal conductance and noise of Majorana modes along interfaced $\nu=5/2$ fractional quantum Hall states. (arXiv:2211.08000v2 [cond-mat.mes-hall] UPDATED)**

Michael Hein, Christian Spånslätt

**Heat transport in Weyl semimetals in the hydrodynamic regime. (arXiv:2211.09254v2 [cond-mat.mes-hall] UPDATED)**

Yonatan Messica, Pavel M. Ostrovsky, Dmitri B. Gutman

**Appearance of Odd-Frequency Superconductivity in a Relativistic Scenario. (arXiv:2212.01849v2 [cond-mat.supr-con] UPDATED)**

Patrick J. Wong, Alexander V. Balatsky

**Full Classification of Transport on an Equilibrated 5/2 Edge via Shot Noise. (arXiv:2212.05732v2 [cond-mat.mes-hall] UPDATED)**

Sourav Manna, Ankur Das, Moshe Goldstein, Yuval Gefen

**Achiral dielectric metasurfaces for spectral and polarization control of valley specific light emission from monolayer MoS2. (arXiv:2212.09147v2 [physics.optics] UPDATED)**

Yin Liu, Sze Cheung Lau, Wen-Hui Sophia Cheng, Amalya Johnson, Qitong Li, Emma Simmerman, Ouri Karni, Jack Hu, Fang Liu, Mark L. Brongersma, Tony F. Heinz, Jennifer A. Dionne

**Composing parafermions: a construction of $Z_{N}$ fractional quantum Hall systems and a modern understanding of confinement and duality. (arXiv:2212.12999v2 [cond-mat.str-el] UPDATED)**

Yoshiki Fukusumi

**Topological Quantum Dimers Emerging from Kitaev Spin Liquid Bilayer: Anyon Condensation Transition. (arXiv:2301.05721v2 [cond-mat.str-el] UPDATED)**

Kyusung Hwang

**Holographic entanglement renormalisation for fermionic quantum matter: geometrical and topological aspects. (arXiv:2302.10590v2 [cond-mat.str-el] UPDATED)**

Abhirup Mukherjee, Siddhartha Patra, Siddhartha Lal

**Degenerate Topological Edge States in Multimer Chains. (arXiv:2303.00053v2 [cond-mat.mes-hall] UPDATED)**

Jun Li, Yaping Yang, C.M. Hu

**Strain Engineering of Photo-induced Topological Phases in 2D Ferromagnets. (arXiv:2303.03305v3 [cond-mat.mes-hall] UPDATED)**

T. V. C. Antão, N. M. R. Peres

**Extracting quantum-geometric effects from Ginzburg-Landau theory in a multiband Hubbard model. (arXiv:2304.03613v3 [cond-mat.supr-con] UPDATED)**

M. Iskin

**Thermoelectric properties of the Corbino disk in graphene. (arXiv:2304.03827v3 [cond-mat.mes-hall] UPDATED)**

Adam Rycerz, Katarzyna Rycerz, Piotr Witkowski

**Exploring the interfacial coupling between graphene and the antiferromagnetic insulator MnPSe$_3$. (arXiv:2304.05757v2 [cond-mat.mtrl-sci] UPDATED)**

Xin Yi, Qiao Chen, Kexin Wang, Yuanyang Yu, Yi Yan, Xin Jiang, Chengyu Yan, Shun Wang

**A Multi-Purpose Platform for Analog Quantum Simulation. (arXiv:2304.08433v2 [cond-mat.quant-gas] UPDATED)**

Shuwei Jin, Kunlun Dai, Joris Verstraten, Maxime Dixmerias, Ragheed Alhyder, Christophe Salomon, Bruno Peaudecerf, Tim de Jongh, Tarik Yefsah

**Asymmetries in triboelectric charging: generalizing mosaic models to different-material samples and sliding contacts. (arXiv:2304.12861v2 [cond-mat.soft] UPDATED)**

Galien Grosjean, Scott Waitukaitis

**A Chern-Simons theory for dipole symmetry. (arXiv:2305.02492v2 [cond-mat.str-el] UPDATED)**

Xiaoyang Huang

**Extended application of random-walk shielding-potential viscosity model of metals in wide temperature region. (arXiv:2305.16551v2 [cond-mat.stat-mech] UPDATED)**

Yuqing Cheng, Xingyu Gao, Qiong Li, Yu Liu, Haifeng Song, Haifeng Liu

Found 12 papers in prb The recently discovered $\mathrm{U}{\mathrm{Te}}_{2}$ superconductor is regarded as a heavy-fermion mixed-valence system with very peculiar properties within the normal and superconducting (SC) states. It shows no signs of magnetic order, but has a strong anisotropy of magnetic susceptibility and SC… Topology is a key ingredient driving the emergence of quantum devices. The topological field-effect transistor (TFET) has been proposed to outperform the conventional field-effect transistor by replacing the on state with topology-protected quantized conductance, while the off state has the same nor… A well-established numerical technique to study the dynamics of spin systems in which symmetries and conservation laws play an important role is to microcanonically integrate their reversible equations of motion, obtaining thermalization through initial conditions drawn with the canonical distributi… Unpaired Majorana zero modes are central to topological quantum computation schemes as building blocks of topological qubits, and are therefore under intense experimental and theoretical investigation. Their generalizations to parafermions and Fibonacci anyons are also of great interest, in particul… The fractional quantum Hall effect (FQHE) in the second Landau level (SLL) likely stabilizes non-Abelian topological orders. Recently, a parton sequence has been proposed to capture many of the fractions observed in the SLL [A. C. Balram, SciPost Phys. Nonsymmorphic crystals can host characteristic double surface Dirac cones with fourfold degeneracy on the Dirac points, called wallpaper fermion, protected by wallpaper group symmetry. We clarify the charge and spin Hall effect of wallpaper fermions in the presence of the (anti)ferromagnetism. Based… We explore the magnetohydrodynamics of Dirac fermions in neutral graphene in the Corbino geometry. Based on the fully consistent hydrodynamic description derived from a microscopic framework and taking into account all peculiarities of graphene-specific hydrodynamics, we report the results of a comp… We unravel a fundamental connection between supersymmetry (SUSY) and a wide class of two-dimensional (2D) second-order topological insulators (SOTI). This particular supersymmetry is induced by applying a half-integer Aharonov-Bohm flux $f=\mathrm{Φ}/{\mathrm{Φ}}_{0}=1/2$ through a hole in the syste… Hall conductivity for the intrinsic anomalous quantum Hall effect in homogeneous systems is given by the topological invariant composed of the Green function depending on momentum of quasiparticle. This expression reveals correspondence with the mathematical notion of the degree of mapping. A more i… By using the constrained-phase quantum Monte Carlo method, we performed a systematic study of the ground state of the half filled Hubbard model for a trilayer honeycomb lattice. We analyze the effect of the perpendicular electric field on the electronic structure, magnetic property, and pairing corr… Topology plays an important role in non-Hermitian systems. How to characterize a non-Hermitian topological system under open-boundary conditions (OBCs) is a challenging problem. A one-dimensional (1D) topological invariant defined on a generalized Brillion zone (GBZ) was recently found to successful… We study the scattering processes and the associated waiting time distributions (WTDs) in heterostructures based on one-dimensional helical edge states of a two-dimensional topological insulator. In combination with a proximitized $s$-wave superconductor and an applied magnetic field a topological t…

Date of feed: Tue, 06 Jun 2023 03:17:14 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+) **Structure of the normal state and origin of the Schottky anomaly in the correlated heavy-fermion superconductor $\mathrm{U}{\mathrm{Te}}_{2}$**

S. Khmelevskyi, L. V. Pourovskii, and E. A. Tereshina-Chitrova

Author(s): S. Khmelevskyi, L. V. Pourovskii, and E. A. Tereshina-Chitrova

[Phys. Rev. B 107, 214501] Published Mon Jun 05, 2023

**Topological field-effect transistor with quantized on/off conductance of helical/chiral dislocation states**

Xiaoyin Li and Feng Liu

Author(s): Xiaoyin Li and Feng Liu

[Phys. Rev. B 107, 224101] Published Mon Jun 05, 2023

**Discrete Laplacian thermostat for spin systems with conserved dynamics**

Andrea Cavagna, Javier Cristín, Irene Giardina, and Mario Veca

Author(s): Andrea Cavagna, Javier Cristín, Irene Giardina, and Mario Veca

[Phys. Rev. B 107, 224302] Published Mon Jun 05, 2023

**Defect bulk-boundary correspondence of topological skyrmion phases of matter**

Shu-Wei Liu, Li-kun Shi, and Ashley M. Cook

Author(s): Shu-Wei Liu, Li-kun Shi, and Ashley M. Cook

[Phys. Rev. B 107, 235109] Published Mon Jun 05, 2023

**Prediction of non-Abelian fractional quantum Hall effect at $ν=2+\frac{4}{11}$**

Koyena Bose and Ajit C. Balram

Author(s): Koyena Bose and Ajit C. Balram**10**, 083 (2021)]. We consider the first member o…

[Phys. Rev. B 107, 235111] Published Mon Jun 05, 2023

**Hall effect of ferro/antiferromagnetic wallpaper fermions**

Koki Mizuno and Ai Yamakage

Author(s): Koki Mizuno and Ai Yamakage

[Phys. Rev. B 107, 235301] Published Mon Jun 05, 2023

**Corbino magnetoresistance in neutral graphene**

Vanessa Gall, Boris N. Narozhny, and Igor V. Gornyi

Author(s): Vanessa Gall, Boris N. Narozhny, and Igor V. Gornyi

[Phys. Rev. B 107, 235401] Published Mon Jun 05, 2023

**Second-order topology and supersymmetry in two-dimensional topological insulators**

Clara S. Weber, Mikhail Pletyukhov, Zhe Hou, Dante M. Kennes, Jelena Klinovaja, Daniel Loss, and Herbert Schoeller

Author(s): Clara S. Weber, Mikhail Pletyukhov, Zhe Hou, Dante M. Kennes, Jelena Klinovaja, Daniel Loss, and Herbert Schoeller

[Phys. Rev. B 107, 235402] Published Mon Jun 05, 2023

**Hall conductivity as the topological invariant in magnetic Brillouin zone in the presence of interactions**

M. Selch, M. Suleymanov, M. A. Zubkov, and C. X. Zhang

Author(s): M. Selch, M. Suleymanov, M. A. Zubkov, and C. X. Zhang

[Phys. Rev. B 107, 245105] Published Mon Jun 05, 2023

**Quantum Monte Carlo study of superconductivity in rhombohedral trilayer graphene under an electric field**

Huijia Dai, Runyu Ma, Xiao Zhang, Ting Guo, and Tianxing Ma

Author(s): Huijia Dai, Runyu Ma, Xiao Zhang, Ting Guo, and Tianxing Ma

[Phys. Rev. B 107, 245106] Published Mon Jun 05, 2023

**Topological invariant for multiband non-Hermitian systems with chiral symmetry**

Chun-Chi Liu, Liu-Hao Li, and Jin An

Author(s): Chun-Chi Liu, Liu-Hao Li, and Jin An

[Phys. Rev. B 107, 245107] Published Mon Jun 05, 2023

**Waiting time distributions in quantum spin Hall based heterostructures**

F. Schulz, D. Chevallier, and M. Albert

Author(s): F. Schulz, D. Chevallier, and M. Albert

[Phys. Rev. B 107, 245406] Published Mon Jun 05, 2023

Found 2 papers in pr_res An experimental realization of the Heisenberg model on the kagome lattice is proposed in highly tunable moiré bilayers of transition metal dichalcogenides. It is demonstrated that the system can host a topologically ordered chiral spin liquid and the much-studied kagome spin liquid for realistic material parameters. Braids are ubiquitous in mathematics and physics. The interesting multistrand braiding topology is visualized by a concise acoustic setup. From the measurements of both eigenvalues and eigenstates, a noncommutative braid relation and a swappable braid relation is precisely captured.

Date of feed: Tue, 06 Jun 2023 03:17:13 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+) **Kagome chiral spin liquid in transition metal dichalcogenide moiré bilayers**

Johannes Motruk, Dario Rossi, Dmitry A. Abanin, and Louk Rademaker

Author(s): Johannes Motruk, Dario Rossi, Dmitry A. Abanin, and Louk Rademaker

[Phys. Rev. Research 5, L022049] Published Mon Jun 05, 2023

**Experimental characterization of three-band braid relations in non-Hermitian acoustic lattices**

Qicheng Zhang, Luekai Zhao, Xun Liu, Xiling Feng, Liwei Xiong, Wenquan Wu, and Chunyin Qiu

Author(s): Qicheng Zhang, Luekai Zhao, Xun Liu, Xiling Feng, Liwei Xiong, Wenquan Wu, and Chunyin Qiu

[Phys. Rev. Research 5, L022050] Published Mon Jun 05, 2023

Found 3 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]+) **Lanthanide-doped MoS2 with enhanced oxygen reduction activity and biperiodic chemical trends**

< author missing >

**Observation of bulk quadrupole in topological heat transport**

< author missing >

**Parallel interrogation of the chalcogenide-based micro-ring sensor array for photoacoustic tomography**

< author missing >