Found 37 papers in cond-mat We discuss the exact non-invertible Kramers-Wannier symmetry of 1+1d lattice
models on a tensor product Hilbert space of qubits. This symmetry is associated
with a topological defect and a conserved operator, and the latter can be
presented as a matrix product operator. Importantly, unlike its continuum
counterpart, the symmetry algebra involves lattice translations. Consequently,
it is not described by a fusion category. We present a clear notion of an
anomaly involving this non-invertible symmetry, parity/time-reversal
symmetries, and lattice translations. Different Hamiltonians with the same
lattice non-invertible symmetry can flow in their continuum limits to
infinitely many different fusion categories (with different Frobenius-Schur
indicators), including, as a special case, the Ising CFT. The non-invertible
symmetry leads to a constraint similar to that of Lieb-Schultz-Mattis, implying
that the system cannot have a unique gapped ground state. It is either in a
gapless phase or in a gapped phase with three (or a multiple of three) ground
states, associated with the spontaneous breaking of the lattice non-invertible
symmetry.
In strongly interacting systems with multiple energy bands, the interplay
between electrons with different effective masses and the enlarged Hilbert
space drives intricate correlated phenomena that do not occur in single-band
systems. Recently, magic-angle twisted trilayer graphene (MATTG) has emerged as
a promising tunable platform for such investigations: the system hosts both
slowly dispersing, "heavy" electrons inhabiting its flat bands as well as
delocalized "light" bands that disperse as free Dirac fermions. Most
remarkably, superconductivity in twisted trilayer graphene and multilayer
analogues with additional dispersive bands exhibits Pauli limit violation and
spans a wider range of phase space compared to that in twisted bilayer
graphene, where the dispersive bands are absent. This suggests that the
interactions between different bands may play a fundamental role in stabilizing
correlated phases in twisted graphene multilayers. Here, we elucidate the
interplay between the light and heavy electrons in MATTG as a function of
doping and magnetic field by performing local compressibility measurements with
a scanning single-electron-transistor microscope. We establish that commonly
observed resistive features near moir\'e band fillings $\nu$=-2, 1, 2 and 3
host a finite population of light Dirac electrons at the Fermi level despite a
gap opening in the flat band sector. At higher magnetic field and near charge
neutrality, we discover a new type of phase transition sequence that is robust
over nearly 10 micrometers but exhibits complex spatial dependence. Mean-field
calculations establish that these transitions arise from the competing
population of the two subsystems and that the Dirac sector can be viewed as a
new flavor analogous to the spin and valley degrees of freedom.
We explore the inelastic spectra of electrons impinging in a magnetic system.
The methodology here presented is intended to highlight the charge-dependent
interaction of the electron beam in a STEM-EELS experiment, and the local
vector potential generated by the magnetic lattice. This interaction shows an
intensity $10^{-2}$ smaller than the purely spin interaction, which is taken to
be functionally the same as in the inelastic neutron experiment. On the other
hand, it shows a strong scattering vector dependence ($\kappa^{-4}$) and a
dependence with the relative orientation between the probe wavevector and the
local magnetic moments of the solid. We present YIG as a case study due to its
high interest by the community.
At and near charge neutrality, monolayer graphene in a perpendicular magnetic
field is a quantum Hall ferromagnet. In addition to the highly symmetric
Coulomb interaction, residual lattice-scale interactions, Zeeman, and
sublattice couplings determine the fate of the ground state. Going beyond the
simplest model with ultra-short-range residual couplings to more generic
couplings, one finds integer phases that show the coexistence of magnetic and
lattice order parameters. Here we show that fractional quantum Hall states in
the vicinity of charge neutrality have even richer phase diagrams, with a
plethora of phases with simultaneous magnetic and lattice symmetry breaking.
We investigate the crossover from an ordinary van Hove singularity (OVHS) to
a higher order van Hove singularity (HOVHS) in a model applicable to Bernal
bilayer graphene and rhombohedral trilayer graphene in a displacement field. At
small doping, these systems possess three spin-degenerate Fermi pockets near
each Dirac point $K$ and $K'$; at larger doping, the three pockets merge into a
single one. The transition is of Lifshitz type and includes van Hove
singularities. Depending on system parameters, there are either 3 separate OVHS
or a single HOVHS. We model this behavior by a one-parameter dispersion
relation, which interpolates between OVHS and HOVHS. In each case, the
diverging density of states triggers various electronic orders
(superconductivity, pair density wave, valley polarization, ferromagnetism,
spin and charge density wave). We apply the parquet renormalization group (pRG)
technique and analyze how the ordering tendencies evolve between OVHS and
HOVHS. We report rich system behavior caused by disappearance/reemergence and
pair production/annihilation of the fixed points of the pRG flow.
The ability to form silk films on semiconductors, metals, and oxides or as
free-standing membranes has motivated research into silk-based electronic,
optical, and biomedical devices. However, the inherent disorder of native silk
limits device performance. Here we report the creation of highly ordered
two-dimensional (2D) silk fibroin (SF) layers on van der Waals solids. Using in
situ atomic force microscopy, synchrotron-based infrared spectroscopy, and
molecular dynamics simulations, we develop a mechanistic understanding of the
assembly process. We show that the films consist of lamellae having an
epitaxial relationship with the underlying lattice and that the SF molecules
exhibit the same Beta-sheet secondary structure seen in the crystallites of the
native form. By increasing the SF concentration, multilayer films form via
layer-by-layer growth, either along a classical pathway in which SF molecules
assemble directly into the lamellae or, at sufficiently high concentrations,
along a two-step pathway beginning with formation of a disordered monolayer
that subsequently converts into the crystalline phase. Kelvin probe
measurements show that these 2D SF layers substantially alter the surface
potential. Moreover, the ability to assemble 2D silk on both graphite and MoS2
suggests that it may provide a general platform for silk-based electronics on
vdW solids.
The bond-dependent Kitaev interaction $K$ is familiar in the effective spin
model of transition metal compounds with octahedral ligands. In this work, we
find a peculiar non-coplanar magnetic order can be formed with the help of $K$
and next nearest neighbor Heisenberg coupling $J_2$ on triangular lattice. It
can be seen as a miniature version of skyrmion lattice, since it has nine spins
and integer topological number in a magnetic unit cell. The magnon excitations
in such an order is studied by the linear spin-wave theory. Of note is that the
change in the relative size of $J_2$ and $K$ will produce topological magnon
phase transitions although the topological number remains unchanged. We also
calculated the experimentally observable thermal Hall conductivity, and found
that the signs of thermal Hall conductivity will change with topological phase
transitions or temperature changes in certain regions.
Topological insulators doped with magnetic impurities has become a promising
candidate for Quantum Anomalous Hall Effect (QAHE) in the dilute doping limit.
The crucial factor in realizing the QAHE in these systems is the spontaneous
Ferromagnetic (FM) ordering between the doped magnetic atoms. Hence,
understanding the magnetic exchange interaction between the magnetic atoms
becomes essential. In this work, we use the Density functional theory (DFT) and
Magnetic force theorem (MFT) to calculate the magnetic exchange interaction
between magnetic impurities (V, Cr, Mn, Fe) in the host Bi2Se3. Through an
orbital decomposition of the calculated exchange, we can identify the nature
and origin of the exchange mechanism that depends on the type of magnetic
atoms, doping concentration, host material etc. Our results show that Cr doping
results in an insulating state, a prerequisite for the QAHE, that remains
robust against doping concentration and local correlation. In this case, the
short-ranged superexchange and long-ranged exchange via the p-orbitals of the
host results in an FM order. For other doped systems (V, Mn and Fe doped),
their electronic configuration and local octahedral environment open the
possibility of finite carrier density at the Fermi energy. Depending on the
type of this carrier (electron/hole) and their localized/delocalized nature, a
short-ranged double exchange / long-ranged RKKY mechanism could occur between
the magnetic atoms.
Recent scanning tunneling microscopy experiments on graphene at charge
neutrality under strong magnetic fields have uncovered a ground state
characterized by Kekul\'e distortion (KD). In contrast, non-local spin and
charge transport experiments in double-encapsulated graphene, which has a
higher dielectric constant, have identified an antiferromagnetic (AF) ground
state. We propose a mechanism to reconcile these conflicting observations, by
showing that Landau-level mixing can drive a transition from AF to KD with the
reduction of the dielectric screening. Our conclusion is drawn from studying
the effect of Landau-level mixing on the lattice-scale, valley-dependent
interactions to leading order in graphene's fine structure constant $\kappa =
e^2/(\hbar v_F \epsilon)$. This analysis provides three key insights: 1)
Valley-dependent interactions remain predominantly short-range with the $m=0$
Haldane pseudopotential being at least an order of magnitude greater than the
others, affirming the validity of delta-function approximation for these
interactions. 2) The phase transition between the AF and KD states is driven by
the microscopic process in the double-exchange Feynman diagram. 3) The
magnitudes of the coupling constants are significantly boosted by remote Landau
levels. Our model also provides a theoretical basis for numerical studies of
fractional quantum Hall states in graphene.
As one indispensable type of nonreciprocal mechanism, a system with temporal
modulations is intrinsically open in the physical sense and inevitably
non-Hermitian, but the space and time degrees of freedom are nonseparable in a
large variety of circumstances, which restrains the non-Bloch band theory to
apply. Here, we investigate the spatially photonic crystals (PhCs) composed of
spatiotemporal modulation materials (STMs) and homogeneous media, dubbed as the
STM-PhC, wherein the spatial and temporal modulations are deliberately designed
to be correlated. To bypass the difficulty of the spatiotemporal correlation,
we first employ the effective medium theory to account for the dispersion of
fundamental bands under the influence of Floquet sidebands. Based on the
dynamical degeneracy splitting viewpoint and continuum generalized Brillouin
zone condition, we then analytically give the criteria for the existence of the
non-Hermitian skin effect in the STM. Assisted by developing a numerical method
that embeds the plane wave expansion in the transfer matrix, we establish the
non-Bloch band theory for the low-frequency Floquet bands in the STM-PhCs, in
which the central is the identification of the generalized Brillouin zone. We
finally delve into the topological properties, including non-Bloch Zak phases
and delocalization of topologically edge states. Our work validates that
effective medium assists the non-Bloch band theory applied to the STM-PhCs,
which delivers a prescription to broaden the horizons of non-Bloch theory.
The ability for real-time control of topological defects can open up
prospects for dynamical manipulation of macroscopic properties of solids. A
sub-category of these defects, formed by particle dislocations, can be
effectively described using the Frenkel-Kontorova chain, which characterizes
the dynamics of these particles in a periodic lattice potential. This model is
known to host solitons, which are the topological defects of the system and are
linked to structural transitions in the chain. This work addresses three key
questions: Firstly, we investigate how imperfections present in concrete
implementations of the model affect the properties of topological defects.
Secondly, we explore how solitons can be injected after the rapid change in
lattice potential or nucleated due to quantum fluctuations. Finally, we analyze
the propagation and scattering of solitons, examining the role of quantum
fluctuations and imperfections in influencing these processes. Furthermore, we
address the experimental implementation of the Frenkel-Kontorova model.
Focusing on the trapped ion quantum simulator, we set the stage for
controllable dynamics of topological excitations and their observation in this
platform.
We establish new results on the spectra and pseudo-spectra of tridiagonal
$k$-Toeplitz operators and matrices. In particular, we prove the connection
between the winding number of the eigenvalues of the symbol function and the
exponential decay of the associated eigenvectors (or pseudo-eigenvectors). Our
results elucidate the topological origin of the non-Hermitian skin effect in
general one-dimensional polymer systems of subwavelength resonators with
imaginary gauge potentials, proving the observation and conjecture in
arXiv:2307.13551. We also numerically verify our theory for these systems.
We show how non-reciprocal ferromagnetic interactions between neighbouring
planar spins in two dimensions, affects the behaviour of topological defects.
Non-reciprocity is introduced by weighting the coupling strength of the
two-dimensional XY model by an anisotropic kernel. As a consequence, in
addition to the topological charge $q$, the actual shape (or phase) of the
defects becomes crucial to faithfully describe their dynamics. Non-reciprocal
coupling twists the spin field, selecting specific defect shapes, dramatically
altering the pair annihilation process. Defect annihilation can either be
enhanced or hindered, depending on the shape of the defects concerned and the
degree of non-reciprocity in the system.
We discuss methods for calculating Chern numbers of two-dimensional lattice
systems using spiral boundary conditions, which sweep all lattice sites in
one-dimensional order. Specifically, we establish the one-dimensional
representation of Fukui-Hatsugai-Suzuki's method, based on lattice gauge
theory, and the Coh-Vanderbilt's method, which relates to electronic
polarization. The essential point of this discussion is that the insertion of
flux into the extended one-dimensional chain generates an effective current in
the perpendicular direction. These methods are valuable not only for a unified
understanding of topological physics in different dimensions but also for
numerical calculations, including the density matrix renormalization group.
We propose an optical analogue of electron snake states based on artificial
gauge magnetic field in photonic graphene with effective strain implemented by
varying distance between pillars. We develop an intuitive and exhaustive
continuous model based on tight-binding approximation and compare it with
numerical simulations of a realistic photonic structure. The allowed lateral
propagation direction is shown to be strongly coupled to the valley degree of
freedom and the proposed photonic structure may be used a valley filter.
Plasmonic lattice nanostructures are of technological interest because of
their capacity to manipulate light below the diffraction limit. Here, we
present a detailed study of dark and bright modes in the visible and
near-infrared energy regime of an inverted plasmonic honeycomb lattice by a
combination of Au+ focused ion beam lithography with nanometric resolution,
optical and electron spectroscopy, and finite-difference time-domain
simulations. The lattice consists of slits carved in a gold thin film,
exhibiting hotspots and a set of bright and dark modes. We proposed that some
of the dark modes detected by electron energy-loss spectroscopy are caused by
antiferroelectric arrangements of the slit polarizations with two times the
size of the hexagonal unit cell. The plasmonic resonances take place within the
0.5_2 eV energy range, indicating that they could be suitable for a synergistic
coupling with excitons in two-dimensional transition metal dichalcogenides
materials or for designing nanoscale sensing platforms based on near-field
enhancement over a metallic surface.
Recently, topological superconductor is one of the important topics in
condensed matter physics due to the exotic features of quasiparticles resided
on the edge, surface and vortex core. In our work, we analyze the two
dimensional s+p wave noncentrosymmetric superconductor(NCS) with Rashba
spin-orbit coupling in 2D cylindrical coordinate to find the relationship
between the topological phase transition and the curvature. With analytical
calculation and numerical analyze, we confirm that the topological phase
transition in s+p wave NCS in 2D cylindrical coordinate is related to the
curvature from band theory perspective.
We microscopically derive a lattice abelian mutual Chern-Simons gauge theory
for a honeycomb Kitaev model subjected to $(001)$ Zeeman and three-spin scalar
spin chirality perturbations. We identify the nature of topological orders,
emergent excitations and ground state degeneracy (GSD), topological
entanglement entropy ($\gamma$), and chiral central charge ($c$) in different
field regimes for both ferromagnetic (FM) and antiferromagnetic (AFM) sign of
the Kitaev interaction. A nonabelian Ising topological order (ITO) exists at
low fields in both cases, with $\gamma=\ln 2,$ $c=1/2,$ and GSD$=3,$ where the
nonabelian anyon, a twist defect, is an intrinsic bulk excitation. For AFM
Kitaev interactions, further increase of the field causes a transition from ITO
to an intermediate trivial topological phase with central charge $c=1/2,$
implying half-quantized thermal Hall response in both phases with no change of
sign. At sufficiently high fields there is a first order transition to a
polarized paramagnetic phase with $\gamma=c=0.$ For the FM case, there is a
direct transition from ITO to the polarized phase.
In this thesis we will focus on a particular variant of few-layer graphene --
ABA-stacked trilayer graphene. Bernal (ABA) stacked trilayer graphene (TLG) is
a multiband system consisting of a pair of Dirac-like massless linear bands and
a pair of massive quadratic bands. We have studied the electronic properties of
this system in detail and unfolded many interesting physics problems. The whole
thesis is structured in the following way. In chapter 2 and chapter 3 we
discuss the theoretical ingredients we will need to understand the experimental
data presented in this thesis. Chapter 2 focuses on the band structure of
graphene and few-layer graphene. In chapter 3 we focus on quantum Hall effect
of graphene and few-layer graphene. In chapter 4 we discuss the device
fabrication and characterization. Chapter 5, Chapter 6 and Chapter 7 present
the original works which are published as papers.
We study the scaling behavior of the R\'enyi entanglement entropy with smooth
boundaries at the phase transition point of the two-dimensional $J-Q_3$ model.
Using the recently developed scaling formula [Deng {\it et al.}, Phys. Rev. B
{\textbf{108}, 125144 (2023)}], we find a subleading logarithmic term with a
coefficient showing that the number of Goldstone modes is four, indicating the
existence of the spontaneous symmetry breaking from an emergent $SO(5)$ to
$O(4)$ in the thermodynamic limit, but restored in a finite size. This result
shows that the believed deconfined quantum critical point of the $J-Q_{3}$
model is a weak first-order transition point. Our work provides a new way to
distinguish a state with spontaneously broken continuous symmetry from a
critical state. The method is particularly useful in identifying weak
first-order phase transitions, which are hard to determine using conventional
methods.
Systems with engineered flatband spectra are a postulate of high-capacity
transmission links and a candidate for high-temperature superconductivity.
However, their operation relies on the edge or surface modes susceptible to
fluctuations and fabrication errors. While the mode robustness can be enhanced
by a combination of Aharonov-Bohm caging and topological insulation, the design
of the corresponding flatbands requires approaches beyond the standard
$k$-vector-based methods. Here, we propose a synthetic-flux probe as a solution
to this problem and a route to the realization of ultra-stable modes. We prove
the concept in a laser-fabricated graphene-like ribbon photonic lattice with
the band-flattening flux induced by "P" waveguide coupling. The topological
non-triviality is witnessed by an integer Zak phase derived from the mean
chiral displacement. Mode stability is evidenced by excellent mode localization
and the robustness to fabrication tolerances and variations of the input phase.
Our results can serve as a basis for the development of multi-flat-band
materials for low-energy electronics.
We construct two free fermion lattice models exhibiting Hawking pair
creation. Specifically, we consider the simplest case of a d=1+1 massless Dirac
fermion, for which the Hawking effect can be understood in terms of a quench of
the uniform vacuum state with a non-uniform Hamiltonian that interfaces modes
with opposite chirality. For both our models we find that additional modes
arising from the lattice discretization play a crucial role, as they provide
the bulk reservoir for the Hawking radiation: the Hawking pairs emerge from
fermions deep inside the Fermi sea scattering off the effective black hole
horizon. Our first model combines local hopping dynamics with a translation
over one lattice site, and we find the resulting Floquet dynamics to realize a
causal horizon, with fermions scattering from the region outside the horizon.
For our second model, which relies on a purely local hopping Hamiltonian, we
find the fermions to scatter from the inside. In both cases, for Hawking
temperatures up to the inverse lattice spacing we numerically find the
resulting Hawking spectrum to be in perfect agreement with the Fermi-Dirac
quantum field theory prediction.
Weyl semimetal is a solid material with isolated touching points between
conduction and valence bands in its Brillouin zone -- Weyl points. Low energy
excitations near these points exhibit a linear dispersion and act as
relativistic massless particles. Weyl points are stable topological objects
robust with respect to most perturbations. We study effects of weak disorder on
the spectral and transport properties of Weyl semimetals in the limit of low
energies. We use a model of Gaussian white-noise potential and apply
dimensional regularization scheme near three dimensions to treat divergent
terms in the perturbation theory. In the framework of self-consistent Born
approximation, we find closed expressions for the average density of states and
conductivity. Both quantities are analytic functions in the limit of zero
energy. We also include interference terms beyond the self-consistent Born
approximation up to the third order in the disorder strength. These
interference corrections are stronger than the mean-field result and
non-analytic as functions of energy. Our main result is the dependence of
conductivity (in units $e^2/h$) on the electron concentration $\sigma =
\sigma_0 - 0.891\, n^{1/3} + 0.115\, (n^{2/3}/\sigma_0) \ln|n|$.
Magnetic topological insulators in the quantum anomalous Hall regime host
ballistic chiral edge channels. When proximitized by an $s$-wave
superconductor, these edge states offer the potential for realizing topological
superconductivity and Majorana bound states without the detrimental effect of
large externally-applied magnetic fields on superconductivity. Realizing
well-separated unpaired Majorana bound states requires magnetic topological
insulator ribbons with a width of the order of the transverse extent of the
edge state, however, which is expected to bring the required ribbon width down
to around 100 nm. In this regime, it is known to be extremely difficult to
retain the ballistic nature of chiral edge channels and realize a quantized
Hall conductance. In this paper, we study the impact of disorder in such
magnetic topological insulator nanoribbons and compare the fragility of
ballistic chiral edge channels with the stability of Majorana bound states when
the ribbon is covered by a superconducting film. We find that the Majorana
bound states exhibit greater robustness against disorder than the underlying
chiral edge channels.
Symmetry is one of the cornerstones of modern physics and has profound
implications in different areas. In topological systems, symmetries are
responsible for protecting surface states, which are at the heart of the
fascinating properties exhibited by these materials. When the symmetry
protecting the edge mode is broken, the topological phase becomes trivial. By
engineering losses that break the symmetry protecting a topological Hermitian
phase, we show that a new genuinely non-Hermitian symmetry emerges, which
protects and selects one of the boundary modes: the topological monomode.
Moreover, the topology of the non-Hermitian system can be characterized by an
effective Hermitian Hamiltonian in a higher dimension. To corroborate the
theory, we experimentally investigated the non-Hermitian 1D and 2D SSH models
using photonic lattices and observed dynamically generated monomodes in both
cases. We classify the systems in terms of the (non-Hermitian) symmetries that
are present and calculate the corresponding topological invariants. Our
findings might have profound implications for photonics and quantum optics
because topological monomodes increase the robustness of corner states by
preventing recombination.
We investigate the Hubbard model with the Rashba spin-orbit coupling on a
square lattice. The Rashba spin-orbit coupling generates two-dimensional Weyl
points in the band dispersion. In a system with edges along [11] direction,
zero-energy edge states appear, while no edge state exists for a system with
edges along an axis direction. The zero-energy edge states with a certain
momentum along the edges are predominantly in the up-spin state on the right
edge, while they are predominantly in the down-spin state on the left edge.
Thus, the zero-energy edge states are helical. By using a variational Monte
Carlo method for finite Coulomb interaction cases, we find that the Weyl points
can move toward the Fermi level by the correlation effects. We also investigate
the magnetism of the model by the Hartree-Fock approximation and discuss weak
magnetic order in the weak-coupling region.
Zigzag nanoribbons hosting the Haldane Chern insulator model are considered.
In this context, a reentrant topological phase, characterized by the emergence
of quasi zero dimensional in-gap states, is discussed. The bound states, which
reside in the gap opened by the hybridization of the counter-propagating edge
modes of the Haldane phase, are localized at the ends of the strip and are
found to be robust against on-site disorder. These findings are supported by
the behavior of the Zak phase over the parameter space, which exhibits jumps of
$\pi$ in correspondence to the phase transitions between the trivial and the
non-trivial phases. The effective mass inversion leading to the jumps in the
Zak phase is interpreted in a low energy framework. Setups with non-uniform
parameters also show topological bound states via the Jackiw-Rebbi mechanism.
All the properties reported are shown to be extremely sensitive to the strip
width.
CeRh$_2$As$_2$ is a new multiphase superconductor with strong suggestions for
an additional itinerant multipolar ordered phase. The modeling of the low
temperature properties of this heavy fermion compound requires a quartet
Ce$^{3+}$ crystal-field ground state. Here we provide the evidence for the
formation of such a quartet state using x-ray spectroscopy. Core-level
photoelectron and x-ray absorption spectroscopy confirm the presence of Kondo
hybridization in CeRh$_2$As$_2$. The temperature dependence of the linear
dichroism unambiguously reveils the impact of Kondo physics for coupling the
Kramer's doublets into an effective quasi-quartet. Non-resonant inelastic x-ray
scattering data find that the $|\Gamma_7^- \rangle$ state with its lobes along
the 110 direction of the tetragonal structure ($xy$ orientation) contributes
most to the multi-orbital ground state of CeRh$_2$As$_2$.
Materials that break time-reversal or inversion symmetry possess
nondegenerate electronic bands, which can touch at so-called Weyl points. The
spinor eigenstates in the vicinity of a Weyl point exhibit a well-defined
chirality $\pm 1$. Numerous works have studied the consequences of this
chirality, for example in unconventional magnetoelectric transport. However,
even a Weyl point with isotropic dispersion is not only characterized by its
chirality but also by the momentum dependence of the spinor eigenstates. For a
single Weyl point, this momentum-space spin structure can be brought into
standard "hedgehog" form by a unitary transformation, but for two or more Weyl
points, this is not possible. In this work, we show that the relative spin
structure of a pair of Weyl points has strong qualitative signatures in the
electromagnetic response. Specifically, we investigate the Friedel oscillations
in the induced charge density due to a test charge for a centrosymmetric system
consisting of two Weyl points with isotropic dispersion. The most pronounced
signature is that the amplitude of the Friedel oscillations falls off as
$1/r^4$ in directions in which both Weyl points exhibit the same spin
structure, while for directions with inverted spin structures, the amplitude of
the Friedel oscillations decreases as $1/r^3$.
Symmetries and their anomalies give strong constraints on renormalization
group (RG) flows of quantum field theories. Recently, the identification of a
theory's global symmetries with its topological sector has provided additional
constraints on RG flows to symmetry preserving gapped phases due to
mathematical results in category and topological quantum field theory. In this
paper, we derive constraints on RG flows from $\mathbb{Z}_2$-valued pure- and
mixed-gravitational anomalies that can only be activated on non-spin manifolds.
We show that such anomalies cannot be matched by a unitary, symmetry preserving
gapped phase without symmetry fractionalization. In particular, we discuss
examples that commonly arise in $4d$ gauge theories with fermions.
Moir\'e materials are artificial crystals formed at van der Waals
heterojunctions that have emerged as a highly tunable platform to realize much
of the rich quantum physics of electrons in atomic scale solids, also providing
opportunities to discover new quantum phases of matter. Here we use finite-size
exact diagonalization methods to explore the physics of single-band itinerant
electron ferromagnetism in semiconductor moir\'e materials. We predict where
ferromagnetism is likely to occur in triangular-lattice moir\'e systems, and
where it is likely to yield the highest Curie temperatures.
Within the Landau-Ginzburg picture of phase transitions, scalar field
theories develop phase separation because of a spontaneous symmetry-breaking
mechanism. This picture works in thermodynamics but also in the dynamics of
phase separation. Here we show that scalar non-equilibrium field theories
undergo phase separation just because of non-equilibrium fluctuations driven by
a persistent noise. The mechanism is similar to what happens in
Motility-Induced Phase Separation where persistent motion introduces an
effective attractive force. We observe that Noise-Induced Phase Separation
occurs in a region of the phase diagram where disordered field configurations
would otherwise be stable at equilibrium. Measuring the local entropy
production rate to quantify the time-reversal symmetry breaking, we find that
such breaking is concentrated on the boundary between the two phases.
We consider a smooth interface between a topological nodal-line semimetal and
a topologically trivial insulator (e.g., the vacuum) or another semimetal with
a nodal ring of different radius. Using a low-energy effective Hamiltonian
including only the two crossing bands, we show that these junctions accommodate
a two-dimensional zero-energy level and a set of two-dimensional dispersive
bands, corresponding to states localized at the interface. We characterize the
spectrum, identifying the parameter ranges in which these states are present,
and highlight the role of the nodal radius and the smoothness of the interface.
We also suggest material-independent ways to detect and identify these states,
using optical conductivity and infrared absorption spectroscopy in magnetic
field.
We develop a hydrodynamic description of electron magnetotransport in
conductors without Galilean invariance in the presence of a weak long-range
disorder potential. We show that magnetoresistance becomes strong (of order 100
%) at relatively small fields, at which the inverse square of the magnetic
length becomes comparable to disorder-induced variations of the electron
density. The mechanism responsible for this anomalously strong
magnetoresistance can be traced to the appearance of magnetic friction force in
liquids with nonvanishing intrinsic conductivity. We derive general results for
the galvanomagnetic and thermomagnetic kinetic coefficients, and obtain their
dependence on the intrinsic dissipative properties of the electron liquid and
the correlation function of the disorder potential. We apply this theory to
graphene close to charge neutrality and cover the crossover to a high-density
regime.
Accurate prediction of band gaps in semiconductors is essential for advancing
materials science and semiconductor technology. This paper extends the
conventional Perdew-Burke-Ernzerhof (PBE) functional to a broad range of
semiconductors, addressing the complexities introduced by varying treatments of
the exchange and correlation enhancement factors within the framework of
Density Functional Theory (DFT). These customized functionals provide a more
transparent solution than previous DFT+U approaches, which required large
negative U values for various chalcogens and pnictides (such as Sulfur (S),
Selenium (Se), and Phosphorus (P)) which is physically unrealistic. The
calculations based on these customized functionals are also much more
cost-effective than GW or HSE-based calculations. Although the modified
functionals are primarily focused on band gap predictions, they still provide
reasonably accurate lattice constants.
Chirality-induced spin selectivity (CISS) is an effect that has recently
attracted a great deal of attention in chiral chemistry and that remains to be
understood. In the CISS effect, electrons passing through chiral molecules
acquire a large degree of spin polarization. In this work we study the case of
atomically-thin chiral crystals created by van der Waals assembly. We show that
this effect can be spectacularly large in systems containing just two
monolayers, provided they are spin-orbit coupled. Its origin stems from the
combined effects of structural chirality and spin-flipping spin-orbit coupling.
We present detailed calculations for twisted homobilayer transition metal
dichalcogenides, showing that the chirality-induced spin polarization can be
giant, e.g. easily exceeding $50\%$ for ${\rm MoTe}_2$. Our results clearly
indicate that twisted quantum materials can operate as a fully tunable platform
for the study and control of the CISS effect in condensed matter physics and
chiral chemistry.
The parton theory constructs candidate FQH states by decomposing the physical
particles into unphysical partons, placing the partons in IQH states, and then
gluing the partons back into the physical particles. Field theoretical
formulations execute the gluing process through the device of emergent gauge
fields. Here we study the process of going from the IQH effect of fermionic
partons to the FQH effect of bosons by introducing an attractive interaction
between the fermions and continuously increasing its strength. It is far from
obvious, a priori, that this process could be adiabatic, that is, go through
without a gap closing, given that the wave function of the bosonic bound state
and its Landau levels (LLs) involve all LLs of the fermions. The absence of an
energy cutoff also makes the theoretical study challenging. We proceed by
considering fermions on a lattice (a convenient lattice for our purposes is a
subdivided icosahedron enclosing a magnetic monopole, which simulates the
standard spherical geometry used in theoretical studies of the FQH effect),
wherein it is possible to work with the full Hilbert space during the entire
process. For all finite systems that we have studied, we find that the system
of two species of fermions occupying IQH states evolves adiabatically into the
FQH effect of the bosons, suggesting that the process may be adiabatic also in
the thermodynamic limit. This physics, reminiscent of the well studied BCS to
BEC crossover, can in principle be realized in ultra-cold atomic systems
consisting of two species of fermionic atoms in a synthetic magnetic field. Our
study suggests that as the strength of the attractive interaction between the
fermions of different species is increased, the system will exhibit a
crossover, without gap closing, from two independent IQH states of fermionic
atoms to a FQH state of bosonic molecules.

Date of feed: Wed, 24 Jan 2024 01:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Non-invertible symmetries and LSM-type constraints on a tensor product Hilbert space. (arXiv:2401.12281v1 [cond-mat.str-el])**

Nathan Seiberg, Sahand Seifnashri, Shu-Heng Shao

**Tunable interplay between light and heavy electrons in twisted trilayer graphene. (arXiv:2401.12284v1 [cond-mat.mes-hall])**

Andrew T. Pierce, Yonglong Xie, Jeong Min Park, Zhuozhen Cai, Kenji Watanabe, Takashi Taniguchi, Pablo Jarillo-Herrero, Amir Yacoby

**Theory of momentum-resolved magnon electron energy loss spectra: The case of Yttrium Iron Garnet. (arXiv:2401.12302v1 [cond-mat.mtrl-sci])**

Julio A. do Nascimento, Phil J. Hasnip, S. A. Cavill, Fabrizio Cossu, Demie Kepaptsoglou, Quentin M. Ramasse, Adam Kerrigan, Vlado K. Lazarov

**Magnetic and Lattice Ordered Fractional Quantum Hall Phases in Graphene. (arXiv:2401.12357v1 [cond-mat.mes-hall])**

Jincheng An, Ajit C. Balram, Ganpathy Murthy

**The Crossover from Ordinary to Higher-Order van Hove Singularity in a Honeycomb System: A Parquet Renormalization Group Analysis. (arXiv:2401.12384v1 [cond-mat.str-el])**

Yueh-Chen Lee, Dmitry V. Chichinadze, Andrey V. Chubukov

**Two-dimensional silk. (arXiv:2401.12400v1 [cond-mat.mtrl-sci])**

Chenyang Shi, Marlo Zorman, Xiao Zhao, Miquel B. Salmeron, Jim Pfaendtner, Xiang Yang Liu, Shuai Zhang, James De Yoreo

**Topological magnons in a non-coplanar magnetic order on the triangular lattice. (arXiv:2401.12505v1 [cond-mat.str-el])**

Linli Bai, Ken Chen

**Revisiting magnetic exchange interactions in transition metal doped Bi$_2$Se$_3$ using DFT+MFT. (arXiv:2401.12514v1 [cond-mat.mtrl-sci])**

Sagar Sarkar, Shivalika Sharma, Igor Di Marco

**Landau-Level Mixing and SU(4) Symmetry Breaking in Graphene. (arXiv:2401.12528v1 [cond-mat.mes-hall])**

Nemin Wei, Guopeng Xu, Inti Sodemann Villadiego, Chunli Huang

**Non-Bloch Theory for Spatiotemporal Photonic Crystals Assisted by Continuum Effective Medium. (arXiv:2401.12536v1 [physics.optics])**

Haozhi Ding, Kun Ding

**Dynamics of quantum discommensurations in the Frenkel-Kontorova chain. (arXiv:2401.12614v1 [cond-mat.stat-mech])**

Oksana Chelpanova, Shane P. Kelly, Ferdinand Schmidt-Kaler, Giovanna Morigi, Jamir Marino

**Spectra and pseudo-spectra of tridiagonal $k$-Toeplitz matrices and the topological origin of the non-Hermitian skin effect. (arXiv:2401.12626v1 [math-ph])**

Habib Ammari, Silvio Barandun, Yannick De Bruijn, Ping Liu, Clemens Thalhammer

**Non-Reciprocal Interactions Reshape Topological Defect Annihilation. (arXiv:2401.12637v1 [cond-mat.stat-mech])**

Ylann Rouzaire, Demian Levis, Ignacio Pagonabarraga

**Chern numbers in two-dimensional systems with spiral boundary conditions. (arXiv:2401.12674v1 [cond-mat.str-el])**

Masaaki Nakamura, Shohei Masuda

**Optical Snake States in Photonic Graphene. (arXiv:2401.12695v1 [cond-mat.mes-hall])**

O.M. Bahrova, S.V. Koniakhin, A.V. Nalitov, E.D. Cherotchenko

**Imaging of Antiferroelectric Dark Modes in an Inverted Plasmonic Lattice. (arXiv:2401.12702v1 [physics.optics])**

Javier Rodriguez Alvarez, Amilcar Labarta, Juan Carlos Idrobo, Rossana Dell Anna, Alessandro Cian, Damiano Giubertoni, Xavier Borrise, Albert Guerrero, Francesc Perez Murano, Arantxa Fraile Rodriguez, Xavier Batlle

**Curvature effect induce topological phase transitions in two dimensional topological superconductor. (arXiv:2401.12705v1 [cond-mat.supr-con])**

Huan-Wen Lai, Meng-Chien Wang, Ching-Ray Chang, Seng-Ghee Tan

**Microscopic theory of field tuned topological transitions in the Kitaev honeycomb model. (arXiv:2401.12750v1 [cond-mat.str-el])**

Jagannath Das, Vikram Tripathi

**Electronic transport properties of few-layer graphene. (arXiv:2401.12804v1 [cond-mat.mes-hall])**

Biswajit Datta

**Diagnosing $SO(5)$ Symmetry and First-Order Transition in the $J-Q_3$ Model via Entanglement Entropy. (arXiv:2401.12838v1 [cond-mat.str-el])**

Zehui Deng, Lu Liu, Wenan Guo, Hai-qing Lin

**Observation of topologically protected compact edge states in flux-dressed graphene photonic lattices. (arXiv:2401.12949v1 [cond-mat.mes-hall])**

Gabriel Cáceres-Aravena, Milica Nedić, Paloma Vildoso, Goran Gligorić, Jovana Petrovic, Rodrigo A. Vicencio, Aleksandra Maluckov

**Hawking radiation on the lattice from Floquet and local Hamiltonian quench dynamics. (arXiv:2204.06583v3 [quant-ph] UPDATED)**

Daan Maertens, Nick Bultinck, Karel Van Acoleyen

**Electron transport in a weakly disordered Weyl semimetal. (arXiv:2205.11565v2 [cond-mat.dis-nn] UPDATED)**

M. E. Ismagambetov, P. M. Ostrovsky

**Robust Majorana bound states in magnetic topological insulator nanoribbons with fragile chiral edge channels. (arXiv:2302.10982v2 [cond-mat.mes-hall] UPDATED)**

Declan Burke, Dennis Heffels, Kristof Moors, Peter Schüffelgen, Detlev Grützmacher, Malcolm R. Connolly

**Topological Monomodes in non-Hermitian Systems. (arXiv:2304.05748v3 [cond-mat.mes-hall] UPDATED)**

E. Slootman, W. Cherifi, L. Eek, R. Arouca, E. J. Bergholtz, M. Bourennane, C. Morais Smith

**Weyl Semimetallic State in the Rashba-Hubbard Model. (arXiv:2307.04307v2 [cond-mat.str-el] UPDATED)**

Katsunori Kubo

**Emerging topological bound states in Haldane model zigzag nanoribbons. (arXiv:2307.14771v3 [cond-mat.mes-hall] UPDATED)**

Simone Traverso, Maura Sassetti, Niccolò Traverso Ziani

**Spectroscopic evidence of Kondo-induced quasi-quartet in CeRh$_2$As$_2$. (arXiv:2308.10663v2 [cond-mat.str-el] UPDATED)**

Denise S. Christovam, Miguel Ferreira-Carvalho, Andrea Marino, Martin Sundermann, Daisuke Takegami, Anna Melendez-Sans, Ku Ding Tsuei, Zhiwei Hu, Sahana Roessler, Manuel Valvidares, Maurits W. Haverkort, Yu Liu, Eric D. Bauer, Liu Hao Tjeng, Gertrud Zwicknagl, Andrea Severing

**Irreducible momentum-space spin structure of Weyl semimetals and its signatures in Friedel oscillations. (arXiv:2308.11986v2 [cond-mat.mes-hall] UPDATED)**

Andy Knoll, Carsten Timm

**Anomaly Enforced Gaplessness and Symmetry Fractionalization for $Spin_G$ Symmetries. (arXiv:2308.12999v3 [hep-th] UPDATED)**

T. Daniel Brennan

**Itinerant ferromagnetism in transition metal dichalcogenides moir\'e superlattices. (arXiv:2309.05556v3 [cond-mat.str-el] UPDATED)**

Pawel Potasz, Nicolás Morales-Durán, Nai Chao Hu, Allan H. MacDonald

**Noise-Induced Phase Separation and Time Reversal Symmetry Breaking in active field theories driven by persistent noise. (arXiv:2310.03423v2 [cond-mat.stat-mech] UPDATED)**

Matteo Paoluzzi, Demian Levis, Andrea Crisanti, Ignacio Pagonabarraga

**Dispersive Drumhead States in Nodal-Line Semimetal Junctions. (arXiv:2310.03896v2 [cond-mat.mes-hall] UPDATED)**

Francesco Buccheri, Reinhold Egger, Alessandro De Martino

**Giant magnetoresistance in weakly disordered non-Galilean invariant conductors. (arXiv:2310.12195v2 [cond-mat.mes-hall] UPDATED)**

Alex Levchenko, Songci Li, A. V. Andreev

**Customizing PBE Exchange-Correlation functionals: A comprehensive approach for band gap prediction in diverse semiconductors. (arXiv:2311.11702v3 [cond-mat.mtrl-sci] UPDATED)**

Satadeep Bhattacharjee, Namitha Anna Koshi, Seung-Cheol Lee

**Giant chirality-induced spin polarization in twisted transition metal dichalcogenides. (arXiv:2312.09169v2 [cond-mat.mes-hall] UPDATED)**

Guido Menichetti, Lorenzo Cavicchi, Leonardo Lucchesi, Fabio Taddei, Giuseppe Iannaccone, Pablo Jarillo-Herrero, Claudia Felser, Frank H. L. Koppens, Marco Polini

**Crossover from Integer to Fractional Quantum Hall Effect. (arXiv:2401.06965v2 [cond-mat.str-el] UPDATED)**

Koji Kudo, Jonathan Schirmer, Jainendra K. Jain

Found 8 papers in prb In this, the third paper in our series describing the excitations of the higher-lattice gauge theory model for topological phases, we will examine the (3+1)-dimensional case in detail. We will explicitly construct the ribbon and membrane operators which create the topological excitations, and use th… We have studied multi-Dirac/Weyl systems with arbitrary topological charge $n$ in the presence of a lattice of local magnetic moments. To do so we propose a multi-Dirac/Weyl Kondo lattice model which is analyzed through a mean-field approach appropriate to the paramagnetic phase. We study both the b… Most iron-based superconductors exhibit stripe-type magnetism, characterized by the ordering vector $\mathbf{Q}=(\frac{1}{2},\frac{1}{2})$. In contrast, ${\mathrm{Fe}}_{1+y}\mathrm{Te}$, the parent compound of the ${\mathrm{Fe}}_{1+y}{\mathrm{Te}}_{1−x}{\mathrm{Se}}_{x}$ superconductors, exhibits do… Landau Fermi liquid theory is a fixed-point theory of metals that includes the forward-scattering amplitudes as exact marginal couplings. However, the fixed-point theory that only includes the strict forward scatterings is nonlocal in real space. In this paper, we revisit the Fermi liquid theory for… Moiré superlattices give a unique opportunity to investigate controllable quantum systems. Previous studies of transition metal dichalcogenide heterobilayers mainly focused on magnetic order at half-filling or charge orders at partial fillings. Here, the authors investigate itinerant ferromagnetism in the vicinity of the van Hove singularity of moiré triangular superlattices. From many-body exact diagonalization calculations that shed light on the magnon spectra and the magnetic susceptibility, the Curie temperature is estimated to vary with moiré lattice constant, from a few to a few tens of kelvins. Semiconductor lasers have formal analogies to Bardeen-Cooper-Schrieffer (BCS) superconductors. This work shows that, in analogy to gapless superconductivity, a gapless lasing parametric regime, in which the frequency gap in the fluctuation spectrum is closed, exists for steady-state semiconductor lasers. The gap opens when the laser intensity exceeds a threshold. This gapless-to-gapped transition occurs at a third-order exceptional point. The recent discovery of polar vortex textures revealed a new fascinating facet of nanoscale ferroelectric materials with prospects for new interaction pathways with chiral, topological, and photonic materials. Here, we demonstrate how the subterahertz collective response of the ferroelectric vortex … Nonuniform strain in graphene can induce a pseudomagnetic field (PMF) preserving time-reversal symmetry, generating pseudo-Landau levels under zero real magnetic field (MF). The different natures between PMF and real MF lead to the counterpropagating valley-polarized edge states under the PMF and un…

Date of feed: Wed, 24 Jan 2024 04:17:01 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) **Excitations in the higher-lattice gauge theory model for topological phases. III. The (3+1)-dimensional case**

Joe Huxford and Steven H. Simon

Author(s): Joe Huxford and Steven H. Simon

[Phys. Rev. B 109, 035152] Published Tue Jan 23, 2024

**Multi-Dirac and Weyl physics in heavy-fermion systems**

Joelson F. Silva and E. Miranda

Author(s): Joelson F. Silva and E. Miranda

[Phys. Rev. B 109, 035153] Published Tue Jan 23, 2024

**Superstructures and magnetic order in heavily Cu-substituted ${({\mathrm{Fe}}_{1−x}{\mathrm{Cu}}_{x})}_{1+y}\mathrm{Te}$**

Saizheng Cao, Xin Ma, Dongsheng Yuan, Zhen Tao, Xiang Chen, Yu He, Patrick N. Valdivia, Shan Wu, Hang Su, Wei Tian, Adam A. Aczel, Yaohua Liu, Xiaoping Wang, Zhijun Xu, Huiqiu Yuan, Edith Bourret-Courchesne, Chao Cao, Xingye Lu, Robert Birgeneau, and Yu Song

Author(s): Saizheng Cao, Xin Ma, Dongsheng Yuan, Zhen Tao, Xiang Chen, Yu He, Patrick N. Valdivia, Shan Wu, Hang Su, Wei Tian, Adam A. Aczel, Yaohua Liu, Xiaoping Wang, Zhijun Xu, Huiqiu Yuan, Edith Bourret-Courchesne, Chao Cao, Xingye Lu, Robert Birgeneau, and Yu Song

[Phys. Rev. B 109, 045142] Published Tue Jan 23, 2024

**Fermi liquids beyond the forward-scattering limit: The role of nonforward scattering for scale invariance and instabilities**

Han Ma and Sung-Sik Lee

Author(s): Han Ma and Sung-Sik Lee

[Phys. Rev. B 109, 045143] Published Tue Jan 23, 2024

**Itinerant ferromagnetism in transition metal dichalcogenide moiré superlattices**

Pawel Potasz, Nicolás Morales-Durán, Nai Chao Hu, and Allan H. MacDonald

Author(s): Pawel Potasz, Nicolás Morales-Durán, Nai Chao Hu, and Allan H. MacDonald

[Phys. Rev. B 109, 045144] Published Tue Jan 23, 2024

**Gapless fluctuations and exceptional points in semiconductor lasers**

N. H. Kwong, M. Em. Spotnitz, and R. Binder

Author(s): N. H. Kwong, M. Em. Spotnitz, and R. Binder

[Phys. Rev. B 109, 045306] Published Tue Jan 23, 2024

**Photonic ferroelectric vortex lattice**

Ramaz Khomeriki, Vakhtang Jandieri, Koki Watanabe, Daniel Erni, Douglas H. Werner, Marin Alexe, and Jamal Berakdar

Author(s): Ramaz Khomeriki, Vakhtang Jandieri, Koki Watanabe, Daniel Erni, Douglas H. Werner, Marin Alexe, and Jamal Berakdar

[Phys. Rev. B 109, 045428] Published Tue Jan 23, 2024

**Absence of edge states at armchair edges in inhomogeneously strained graphene under a pseudomagnetic field**

Jing-Yun Fang, Yu-Chen Zhuang, and Qing-Feng Sun

Author(s): Jing-Yun Fang, Yu-Chen Zhuang, and Qing-Feng Sun

[Phys. Rev. B 109, 045430] Published Tue Jan 23, 2024

Found 5 papers in prl Multiparton interactions are a fascinating phenomenon that occur in almost every high-energy hadron-hadron collision yet are remarkably difficult to study quantitatively. In this Letter, we present a strategy to optimally disentangle multiparton interactions from the primary scattering in a collisio… We suggest the use of broadband frequency modulation to construct a novel type of optical interferometer. This interferometer is insensitive to optical phase and allows measurement of the group velocity and group velocity dispersion without the need for short pulse apparatus. Light–matter interactions in certain one-dimensional photonic materials can bring light nearly to a standstill, an effect that researchers show requires consideration of long-range interactions between the material’s components. Stochastic processes are commonly used models to describe dynamics of a wide variety of nonequilibrium phenomena ranging from electrical transport to biological motion. The transition matrix describing a stochastic process can be regarded as a non-Hermitian Hamiltonian. Unlike general non-Hermitian … Crystallization on spherical surfaces is obliged by topology to induce lattice defects. But controlling the organization of such defects remains a great challenge due to the long-range constraints of the curved geometry. Here, we report on DNA-coated colloids whose programmable interaction potential…

Date of feed: Wed, 24 Jan 2024 04:16:58 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) **Exploring High-Purity Multiparton Scattering at Hadron Colliders**

Jeppe R. Andersen, Pier Francesco Monni, Luca Rottoli, Gavin P. Salam, and Alba Soto-Ontoso

Author(s): Jeppe R. Andersen, Pier Francesco Monni, Luca Rottoli, Gavin P. Salam, and Alba Soto-Ontoso

[Phys. Rev. Lett. 132, 041901] Published Tue Jan 23, 2024

**Interferometer for Dispersive Measurements**

S. E. Harris

Author(s): S. E. Harris

[Phys. Rev. Lett. 132, 043802] Published Tue Jan 23, 2024

**Photonic Flatband Resonances in Multiple Light Scattering**

Thanh Xuan Hoang, Daniel Leykam, and Yuri Kivshar

Author(s): Thanh Xuan Hoang, Daniel Leykam, and Yuri Kivshar

[Phys. Rev. Lett. 132, 043803] Published Tue Jan 23, 2024

**Role of Topology in Relaxation of One-Dimensional Stochastic Processes**

Taro Sawada, Kazuki Sone, Ryusuke Hamazaki, Yuto Ashida, and Takahiro Sagawa

Author(s): Taro Sawada, Kazuki Sone, Ryusuke Hamazaki, Yuto Ashida, and Takahiro Sagawa

[Phys. Rev. Lett. 132, 046602] Published Tue Jan 23, 2024

**Programmable Potentials Choreograph Defects in a Colloidal Crystal Shell**

Guolong Zhu, Lijuan Gao, Yuming Wang, Tsvi Tlusty, and Li-Tang Yan

Author(s): Guolong Zhu, Lijuan Gao, Yuming Wang, Tsvi Tlusty, and Li-Tang Yan

[Phys. Rev. Lett. 132, 048201] Published Tue Jan 23, 2024

Found 1 papers in pr_res The extraordinary sensitivity of the mammalian inner ear has captivated scientists for decades, largely due to the crucial role played by the outer hair cells (OHCs) and their unique electromotile properties. Typically arranged in three rows along the sensory epithelium, the OHCs work in concert via…

Date of feed: Wed, 24 Jan 2024 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) **Noise within: Signal-to-noise enhancement via coherent wave amplification in the mammalian cochlea**

Alessandro Altoè and Christopher A. Shera

Author(s): Alessandro Altoè and Christopher A. Shera

[Phys. Rev. Research 6, 013084] Published Tue Jan 23, 2024

Found 3 papers in nano-lett

Date of feed: Tue, 23 Jan 2024 14:05:42 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] Experimental Decoding and Tuning Electronic Friction of Si Nanotip Sliding on Graphene**

Yutao Li, Bozhao Wu, Wengen Ouyang, Ze Liu, and Wen WangNano LettersDOI: 10.1021/acs.nanolett.3c03642

**[ASAP] Quantum Conductance in Vertical Hexagonal Boron Nitride Memristors with Graphene-Edge Contacts**

Jing Xie, Md Naim Patoary, Md Ashiqur Rahman Laskar, Nicholas D. Ignacio, Xun Zhan, Umberto Celano, Deji Akinwande, and Ivan Sanchez EsquedaNano LettersDOI: 10.1021/acs.nanolett.3c04057

**[ASAP] Monolayer-like Exciton Recombination Dynamics of Multilayer MoSe2 Observed by Pump–Probe Microscopy**

Cullen P. Walsh, Jason P. Malizia, Sarah C. Sutton, John M. Papanikolas, and James F. CahoonNano LettersDOI: 10.1021/acs.nanolett.3c04754

Found 2 papers in acs-nano

Date of feed: Tue, 23 Jan 2024 14:03:46 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] Hybrid Edge Results in Narrowed Band Gap: Bottom-up Liquid-Phase Synthesis of Bent N = 6/8 Armchair Graphene Nanoribbons**

Gang Li, Hanfei Wang, Michael Loes, Anshul Saxena, Jiangliang Yin, Mamun Sarker, Shinyoung Choi, Narayana Aluru, Joseph W. Lyding, Alexander Sinitskii, and Guangbin DongACS NanoDOI: 10.1021/acsnano.3c09825

**[ASAP] Coexisting Phases in Transition Metal Dichalcogenides: Overview, Synthesis, Applications, and Prospects**

Haiyang Liu, Yaping Wu, Zhiming Wu, Sheng Liu, Vanessa Li Zhang, and Ting YuACS NanoDOI: 10.1021/acsnano.3c10665