Found 35 papers in cond-mat Angle-resolved photoemission spectroscopy (ARPES) -- with its exceptional
sensitivity to both the binding energy and momentum of valence electrons in
solids -- provides unparalleled insights into the electronic structure of
quantum materials. Over the last two decades, the advent of femtosecond lasers,
which can deliver ultrashort and coherent light pulses, has ushered the ARPES
technique into the time domain. Now, time-resolved ARPES (TR-ARPES) can probe
ultrafast electron dynamics and the out-of-equilibrium electronic structure,
providing a wealth of information otherwise unattainable in conventional ARPES
experiments. This paper begins with an introduction to the theoretical
underpinnings of TR-ARPES followed by a description of recent advances in
state-of-the-art ultrafast sources and optical excitation schemes. It then
reviews paradigmatic phenomena investigated by TR-ARPES thus far, such as
out-of-equilibrium electronic states and their spin dynamics, Floquet-Volkov
states, photoinduced phase transitions, electron-phonon coupling, and surface
photovoltage effects. Each section highlights TR-ARPES data from diverse
classes of quantum materials, including semiconductors, charge-ordered systems,
topological materials, excitonic insulators, van der Waals materials, and
unconventional superconductors. These examples demonstrate how TR-ARPES has
played a critical role in unraveling the complex dynamical properties of
quantum materials. The conclusion outlines possible future directions and
opportunities for this powerful technique.
The study of the non-linear anomalous Hall effect (NLAHE) in
$\mathcal{P}\mathcal{T}$-symmetric systems has focussed on intrinsic
mechanisms. Here we show that disorder contributes substantially to NLAHE and
often overwhelms intrinsic terms. We identify terms to zeroth order in the
disorder strength involving the Berry curvature dipole, skew scattering and
side-jump, all exhibiting a strong peak as a function of the Fermi energy, a
signature of interband coherence. Our results suggest NLAHE at experimentally
relevant transport densities in $\mathcal{P}\mathcal{T}$-symmetric systems is
likely to be extrinsic.
In this Letter, we propose a universal edge theory for the higher-dimensional
non-Hermitian edge-skin modes. In contrast to the well-understood corner-skin
effect, we demonstrate that the edge-skin effect requires the protection of
reciprocity or inversion. Through an exact mapping, we show that these skin
modes share the same bulk-edge correspondence as the Fermi-arc states in a
Hermitian Dirac semimetal. Based on this mapping, we introduce a bulk
projection criterion to identify the skin edge, and utilize the non-Bloch
Hamiltonian under specific cylinder geometry to characterize the localization
features of edge-skin modes. We find that the edge-skin modes are made of
components with real-valued momenta along the edge, and interestingly the decay
direction typically deviates from the normal direction of the edge, a
phenomenon we term skewness. Furthermore, we reveal the remarkable sensitivity
of the cylinder-geometry spectrum to disturbances that violate fragile
reciprocity. When this symmetry is disrupted, the cylinder-geometry spectrum
undergoes an abrupt transition towards the near open-boundary spectrum,
underscoring a key difference between corner-skin and edge-skin effects.
$\alpha$-Sn is an elemental topological material, whose topological phases
can be tuned by strain and magnetic field. Such tunability offers a substantial
potential for topological electronics. However, InSb substrates, commonly used
to stabilize $\alpha$-Sn allotrope, suffer from parallel conduction,
restricting transport investigations and potential applications. Here, the
successful MBE growth of high-quality $\alpha$-Sn layers on insulating, hybrid
CdTe/GaAs(001) substrates, with bulk electron mobility approaching 20000
cm$^2$V$^{-1}$s$^{-1}$ is reported. The electronic properties of the samples
are systematically investigated by independent complementary techniques,
enabling thorough characterization of the 3D Dirac (DSM) and Weyl (WSM)
semimetal phases induced by the strains and magnetic field, respectively.
Magneto-optical experiments, corroborated with band structure modeling, provide
an exhaustive description of the bulk states in the DSM phase. The modeled
electronic structure is directly observed in angle-resolved photoemission
spectroscopy, which reveals linearly dispersing bands near the Fermi level. The
first detailed study of negative longitudinal magnetoresistance relates this
effect to the chiral anomaly and, consequently, to the presence of WSM.
Observation of the $\pi$ Berry phase in Shubnikov-de Haas oscillations agrees
with the topologically non-trivial nature of the investigated samples. Our
findings establish $\alpha$-Sn as an attractive topological material for
exploring relativistic physics and future applications.
To date, there are very few experimental techniques, if any, that are
suitable for the purpose of acquiring, with nanoscale lateral resolution,
quantitative maps of the thermal expansivity of 2D materials and thin films,
despite huge demand for nanoscale thermal management, for example in designing
integrated circuitry for power electronics. Besides, contactless analytical
tools for determining the thermal expansion coefficient (TEC) are highly
desirable, because probes in contact with the sample significantly perturb any
thermal measurements. Here, we introduce {\omega}-2{\omega} near-field
thermoreflectance imaging, as an all-optical and contactless approach to map
the TEC at the nanoscale with precision. Testing of our technique is performed
on nanogranular films of gold and multilayer graphene (ML-G) platelets. Our
method demonstrates that the TEC of Au is higher at the metal-insulator
interface, with an average of (17.12 +/- 2.30)x10-6 K-1 in agreement with
macroscopic techniques. For ML-G, the average TEC was (-5.77 +/- 3.79)x10-6 K-1
and is assigned to in-plane vibrational bending modes. A vibrational-thermal
transition from graphene to graphite is observed, where the TEC becomes
positive as the ML thickness increases. Our nanoscale method demonstrates
results in excellent agreement with its macroscopic counterparts, as well as
superior capabilities to probe 2D materials and interfaces.
Motivated by recent experimental results we calculate from first-principles
the lifetime of low-energy quasiparticles in bilayer graphene (BLG). We take
into account the scattering rate arising from electron-electron interactions
within the $GW$ approximation for the electron self-energy and consider several
p-type doping levels ranging from $0$ to $\rho \approx 2.4\times 10^{12}$
holes/cm$^2$. In the undoped case we find that the average inverse lifetime
scales linearly with energy away from the charge neutrality point, with values
in good agreement with experiments. The decay rate is approximately three times
larger than in monolayer graphene, a consequence of the enhanced screening in
BLG. In the doped case, the dependence of the inverse lifetime on quasiparticle
energy acquires a non-linear component due to the opening of an additional
decay channel mediated by acoustic plasmons.
The observation of zero-bias conductance peaks in vortex cores of certain
Fe-based superconductors has sparked renewed interest in vortex-bound Majorana
states. These materials are believed to be intrinsically topological in their
bulk phase, thus avoiding potentially problematic interface physics encountered
in superconductor-semiconductor heterostructures. However, progress toward a
vortex-based topological qubit is hindered by our inability to measure the
topological quantum state of a non-local vortex Majorana state, i.e., the
charge of a vortex pair. In this paper, we theoretically propose a
microwave-based charge parity readout of the Majorana vortex pair charge. A
microwave resonator above the vortices can couple to the charge allowing for a
dispersive readout of the Majorana parity. Our technique may also be used in
vortices in conventional superconductors and allows one to probe the lifetime
of vortex-bound quasiparticles, which is currently beyond existing scanning
tunneling microscopy capabilities.
Thouless charge pumping protocol provides an effective route for realizing
topological particle transport. To date, the first-order and higher-order
topological pumps, exhibiting transitions of edge-bulk-edge and
corner-bulk-corner states, respectively, are observed in a variety of
experimental platforms. Here, we propose a concept of hybrid-order topological
pump, which involves a transition of bulk, edge, and corner states
simultaneously. More specifically, we consider a Kekul\'e-textured graphene
lattice that features a tunable phase parameter. The finite sample of zigzag
boundaries, where the corner configuration is abnormal and inaccessible by
repeating unit cells, hosts topological responses at both the edges and
corners. The former is protected by a nonzero winding number, while the latter
can be explained by a nontrivial vector Chern number. Using our skillful
acoustic experiments, we verify those nontrivial boundary landmarks and
visualize the consequent hybrid-order topological pump process directly. This
work deepens our understanding to higher-order topological phases and broadens
the scope of topological pumps.
We propose a mechanism to obtain chiral phonon-like excitations from the
bond-dependent magnetoelastic couplings in the absence of out-of-plane
magnetization and magnetic fields. We provide a systematic way to understand
the hybrid excitation by its phononic analog, and thus we dub it
magneto-phonon. We recognize that the system is equivalent to the class D of
topological phonons, and show the tunable chirality and topology by an in-plane
magnetic field in the example of a triangular lattice ferromagnet. As a
possible experimental probe, we evaluate the thermal Hall conductivity. Our
study gives a new perspective on tunable topological and chiral excitations
without Dzaloshinskii-Moriya and Raman spin interactions, which suggests
possible applications of spintronics and phononics in various anisotropic
magnets and/or Kitaev materials.
We propose a protocol to realize synthetic $p_x+ip_y$ superconductors in
one-dimensional topological systems that host Majorana fermions. By
periodically driving a localized Majorana mode across the system, our protocol
realizes a topological pumping of Majorana fermions, analogous to the adiabatic
Thouless pumping of electrical charges. Importantly, similar to the realization
of a Chern insulator through Thouless pumping, we show that pumping of Majorana
zero modes could lead to a $p_x + ip_y$ superconductor in the two dimensions of
space and synthetic time. The Floquet theory is employed to map the driven
one-dimensional system to a two-dimensional synthetic system by considering
frequency as a new dimension. We demonstrate such Floquet $p_x + i p_y$
superconductors using the Kitaev $p$-wave superconductor chain, a prototypical
1D topological system, as well as its more realistic realization in the 1D
Kondo lattice model as examples. We further show the appearance of a new $\pi$
Majorana mode at the Floquet zone boundary in an intermediate drive frequency
region. Our work suggests a driven magnetic spiral coupled to a superconductor
as a promising platform for the realization of novel topological
superconductors.
We study two dimensional electron systems confined in wide quantum wells
whose subband separation is comparable with the Zeeman energy. Two N = 0 Landau
levels from different subbands and with opposite spins are pinned in energy
when they cross each other and electrons can freely transfer between them. When
the disorder is strong, we observe clear hysteresis in our data corresponding
to instability of the electron distribution in the two crossing levels. When
the intra-layer interaction dominates, multiple minima appear when a Landau
level is 1/3 or 2/3 filled and fractional quantum hall effect can be
stabilized.
Recently, Elouard and Lombard Latune [PRX Quantum 4, 020309 (2023)] claimed
to extend the laws of thermodynamics to "arbitrary quantum systems" valid "at
any scale" using "consistent" definitions allowing them to "recover known
results" from the literature. I show that their definitions are in conflict
with textbook thermodynamics and over- or underestimate the real entropy
production by orders of magnitude. The cause of this problem is traced back to
problematic definitions of entropy and temperature, the latter, for instance,
violates the zeroth law. It is pointed out that another framework presented in
PRX Quantum 2, 030202 (2021) does not suffer from these problems, while Elouard
and Lombard Latune falsely claim that it only provides a positive entropy
production for a smaller class of initial states. A simple way to unify both
approaches is also presented.
Charge density waves (CDW) profoundly affect the electronic properties of
materials and have an intricate interplay with other collective states, like
superconductivity and magnetism. The well-known macroscopic Ginzburg-Landau
theory stands out as a theoretical method for describing CDW phenomenology
without requiring a microscopic description. In particular, it has been
instrumental in understanding the emergence of domain structures in several CDW
compounds, as well as the influence of critical fluctuations and the evolution
towards or across lock-in transitions. In this context, McMillan's foundational
work introduced discommensurations as the objects mediating the transition from
commensurate to incommensurate CDW, through an intermediate nearly commensurate
phase characterised by an ordered array of phase slips. Here, we extend the
simplified, effectively one-dimensional, setting of the original model to a
fully two-dimensional analysis. We find exact and numerical solutions for
several types of discommensuration patterns and provide a framework for
consistently describing multi-component CDW embedded in quasi-two-dimensional
atomic lattices.
We study a one-dimensional ladder of two coupled XXZ spin chains and identify
several distinct gapless symmetry-enriched critical phases. These have the same
unbroken symmetries and long-wavelength description, but cannot be connected
without encountering either a phase transition or other intermediate phases.
Using bosonizaion, we analyze the nature of their distinction by determining
how microscopic symmetries are manifested in the long-wavelength fields, the
behavior of charged local and nonlocal operators, and identify the universality
class of all direct continuous phase transitions between them. One of these
phases is a gapless topological phase with protected edge modes. We
characterize its precise nature and place it within the broader classification.
We also find the occurrence of `multiversality' in the phase diagram, wherein
two fixed phases are separated by continuous transitions with different
universality classes in different parameter regimes. We determine the phase
diagram and all its aspects, as well as verify our predictions numerically
using density matrix renormalization group and a mapping onto an effective
spin-1 model.
Understanding the nematic phase observed in the iron-chalcogenide materials
is crucial for describing their superconducting pairing. Experiments on
FeSe$_{1-x}$S$_x$ showed that one of the slow Shubnikov--de Haas quantum
oscillation frequencies disappears when tuning the material out of the nematic
phase via chemical substitution or pressure, which has been interpreted as a
Lifshitz transition [Coldea et al., npj Quant Mater 4, 2 (2019), Reiss et al.,
Nat. Phys. 16, 89-94 (2020)]. Here, we present a generic, alternative scenario
for a nematicity-induced sharp quantum oscillation frequency which disappears
in the tetragonal phase and is not connected to an underlying Fermi surface
pocket. We show that different microscopic interband scattering mechanisms -
for example, orbital-selective scattering - in conjunction with nematic order
can give rise to this quantum oscillation frequency beyond the standard Onsager
relation. We discuss implications for iron-chalcogenides and the interpretation
of quantum oscillations in other correlated materials.
Magnon interference is a signature of coherent magnon interactions for
coherent information processing. In this work, we demonstrate programmable
real-time magnon interference, with examples of nearly perfect constructive and
destructive interference, between two remotely coupled yttrium iron garnet
spheres mediated by a coplanar superconducting resonator. Exciting one of the
coupled resonators by injecting single- and double-microwave pulse leads to the
coherent energy exchange between the remote magnonic resonators and allows us
to realize a programmable magnon interference that can define an arbitrary
state of coupled magnon oscillation. The demonstration of time-domain coherent
control of remotely coupled magnon dynamics offers new avenues for advancing
coherent information processing with circuit-integrated hybrid magnonic
networks.
The static and dynamic properties of dendrimers in semidilute solutions of
linear chains of comparable size are investigated using Brownian dynamics
simulations. The radius of gyration and diffusivity of a wide variety of low
generation dendrimers and linear chains in solution follow universal scaling
laws independent of their topology. Analysis of the shape functions and
internal density of dendrimers shows that they are more spherical than linear
chains and have a dense core. At intermediate times, dendrimers become
subdiffusive, with an exponent higher than that previously reported for
nanoparticles in semidilute polymer solutions. The long-time diffusivity of
dendrimers does not follow theoretical predictions for nanoparticles. We
propose a new scaling law for the long-time diffusion coefficient of dendrimers
which accounts for the fact that, unlike nanoparticles, dendrimers shrink with
an increase in background solution concentration. Analysis of the properties of
a special case of a higher functionality dendrimer shows a transition from
polymer-like to nanoparticle-like behaviour.
Nontrivial band topology along with magnetism leads to different novel
quantum phases. When time-reversal-symmetry is broken in three-dimensional
topological insulators (TIs) by applying high enough magnetic field or
proximity effect, different phases such as quantum Hall or quantum anomalous
Hall(QAH) emerge and display interesting transport properties for spintronic
applications. The QAH phase displays sidewall chiral edge states which leads to
the QAH effect. In a finite slab, contribution of the surface states depends on
both the cross-section and thickness of the system. Having a small
cross-section and a thin thickness leads to direct coupling of the surfaces, on
the other hand, a thicker slab results in a higher contribution of the
non-trivial sidewall states which connect top and bottom surfaces. In this
regard, we have considered a heterostructure consisting of a TI, namely Bi2Se3,
which is sandwiched between two-dimensional magnetic monolayers of CrI3 to
study its topological and transport properties. Combining DFT and tight-binding
calculations along with non-equilibrium Green's function formalism, we show
that a well-defined exchange gap appears in the band structure in which spin
polarised edge states flow. We also study the width and finite-size effect on
the transmission and topological properties of this magnetised TI nanoribbon.
The phase diagram of an interacting two-dimensional electron system in a high
magnetic field is enriched by the varying form of the effective Coulomb
interaction, which depends strongly on the Landau level index. While the
fractional quantum Hall states that dominate in the lower energy Landau levels
have been explored experimentally in a variety of two-dimensional systems, much
less work has been done to explore electron solids owing to their subtle
transport signatures and extreme sensitivity to disorder. Here we use chemical
potential measurements to map the phase diagram of electron solid states in
$N=2$, $N=3$, and $N=4$ Landau levels in monolayer graphene. Direct comparison
between our data and theoretical calculations reveals a cascade of
density-tuned phase transitions between electron bubble phases up to two, three
or four electrons per bubble in the N=2, 3 and 4 Landau levels respectively.
Finite temperature measurements are consistent with melting of the solids for
T$\approx$1K.
We present a first-principles study of the low-temperature rhombohedral phase
of BaTiO$_3$ using Hubbard-corrected density-functional theory. By employing
density-functional perturbation theory, we compute the onsite Hubbard $U$ for
Ti($3d$) states and the intersite Hubbard $V$ between Ti($3d$) and O($2p$)
states. We show that applying the onsite Hubbard $U$ correction alone to
Ti($3d$) states proves detrimental, as it suppresses the Ti($3d$)-O($2p$)
hybridization and drives the system towards a cubic phase. Conversely, when
both onsite $U$ and intersite $V$ are considered, the localized character of
the Ti($3d$) states is maintained, while also preserving the Ti($3d$)-O($2p$)
hybridization, restoring the rhombohedral phase of BaTiO$_3$. The generalized
PBEsol+$U$+$V$ functional yields remarkable agreement with experimental results
for the band gap and dielectric constant, while the optimized geometry is
slightly less accurate compared to PBEsol. Zone-center phonon frequencies and
Raman spectra, being significantly influenced by the underlying geometry,
demonstrate better agreement with experiments in the case of PBEsol, while
PBEsol+$U$+$V$ exhibits reduced accuracy, and the PBEsol+$U$ Raman spectrum
diverges remarkably from experimental data, highlighting the adverse impact of
the $U$ correction alone in BaTiO$_3$. Our findings underscore the promise of
the extended Hubbard PBEsol+$U$+$V$ functional with first-principles $U$ and
$V$ for the investigation of other ferroelectric perovskites with mixed
ionic-covalent interactions.
Copper hydroxyhalide materials herbertsmithite ZnCu$_{3}$(OH)$_{6}$Cl$_{2}$
and Zn-barlowite ZnCu$_{3}$(OH)$_{6}$FrBr are thought to be the best
realizations of the spin-$\frac{1}{2}$ Kagome quantum antiferromagnetic
Heisenberg model and are widely believed to host a spin liquid ground state.
However, the exact nature of such a novel state of matter is still under strong
debate, partly due to the complication related to the occupation disorder
between the Zinc and the Copper ions in these systems. In particular, recent
nuclear magnetic resonance measurements indicate that the magnetic response of
the Kagome plane is significantly spatial inhomogeneous, even though the
content of the misplaced Zinc or Copper ions is believed to be very small. Here
we use extensive variational optimization to show that the well known
$U(1)$-Dirac spin liquid state is extremely sensitive to the introduction of
the nonmagnetic Zinc impurity in the Kagome plane. More specifically, we find
that the Zinc impurities can significantly reorganize the local spin
correlation pattern around them and induce strong spatial oscillation in the
magnetic response of the system. We argue that this is a general trend in
highly frustrated quantum magnet systems, in which the nonmagnetic impurity may
act as strongly relevant perturbation on the emergent resonating valence bond
structure in their spin liquid ground state. We also argue that the strong
spatial oscillation in the magnetic response should be attributed to the free
moment released by the doped Zinc ions and may serve as the smoking gun
evidence for the Dirac node in the $U(1)$ Dirac spin liquid state on the Kagome
lattice.
The spontaneous fluorescence rates of single-molecule emitters are typically
on the order of nanoseconds. However coupling them with plasmonic
nanostructures can substantially increase their fluorescence yields. The
confinement between the tip and sample of a scanning tunneling microscope
creates a tunable nanocavity, an ideal platform for exploring the yields and
excitation decay rates of single-molecule emitters depending on the coupling
strength to the nanocavity. With this setup we estimate the excitation
lifetimes from the direct time-resolved measurements of the fluorescence decays
of phthalocyanine adsorbates, decoupled from the metal substrates by ultrathin
NaCl layers. It is found that nanosecond-range lifetimes prevail for the
emitters away from the nanocavity, whereas for the tip approached to a
molecule, we find a substantial effect of the nanocavity coupling, which
reduces the lifetimes to a few picoseconds. An analysis is performed to
investigate the crossover between the far-field and tip-enhanced
photoluminescence regimes. This approach overcomes the drawbacks associated
with the estimation of lifetimes for single molecules from their respective
emission linewidths.
Freestanding tubular crystals offer a general description of crystalline
order on deformable surfaces with cylindrical topology, such as single-walled
carbon nanotubes, microtubules, and recently reported colloidal assemblies.
These systems exhibit a rich interplay between the crystal's helicity on its
periodic surface, the deformable geometry of that surface, and the motions of
topological defects within the crystal. Previously, in simulations of tubular
crystals as elastic networks, we found that dislocations in nontrivial patterns
can co-stabilize with kinks in the tube shape, producing mechanical
multistability. Here, we extend that work with detailed Langevin dynamics
simulations, in order to explore defect dynamics efficiently and without the
constraints imposed by elastic network models. Along with the predicted
multistability of dislocation glide, we find a variety of irreversible defect
transformations, including vacancy formation, particle extrusions, and
"reactions" that reorient dislocation pairs. Moreover, we report spontaneous
sequences of several such defect transformations, which are unique to tubular
crystals. We demonstrate a simple method for controlling these sequences
through a time-varying external force.
We use the quantum work statistics to characterize the controlled dynamics
governed by a counterdiabatic driving field. Focusing on the Shannon entropy of
the work probability distribution, $P(W)$, we demonstrate that the
thermodynamics of a controlled evolution serves as an insightful tool for
studying the non-equilibrium dynamics of complex quantum systems. In
particular, we show that the entropy of $P(W)$ recovers the expected scaling
according to the Kibble-Zurek mechanism for the Landau-Zener model.
Furthermore, we propose that the entropy of the work distribution provides a
useful summary statistic for characterizing the need and complexity of the
control fields for many-body systems.
Typical magnetic skyrmion is a string of inverted magnetization within a
ferromagnet, protected by a sleeve of a vortex-like spin texture, such that its
cross-section carries a positive integer topological charge. Some magnets form
antiskyrmions, the antiparticle strings which carry a negative topological
charge instead. Here we demonstrate that topologically equivalent but purely
electric antiskyrmion can exist in a ferroelectric material as well. In
particular, our computer experiments reveal that the archetype ferroelectric,
barium titanate, can host antiskyrmions. The polarization pattern around their
cores reminds ring windings of decorative knots rather than the typical
magnetic antiskyrmion texture. We show that the antiskyrmion of barium titanate
has just 2-3 nm in diameter, a hexagonal cross-section, and an exotic
topological charge of minus two. We deduce that formation of antiskyrmions is
favored by a fortunate combination of the moderate anisotropy of the anharmonic
electric susceptibility and the characteristic anisotropy of the polarization
correlations in barium titanate crystals.
We propose a novel analog memory device utilizing the gigantic magnetic Weyl
semimetal (MWSM) domain wall (DW) magnetoresistance. We predict that the
nucleation of domain walls between contacts will strongly modulate the
conductance and allow for multiple memory states, which has been long
sought-after for use in magnetic random access memories or memristive
neuromorphic computing platforms. We motivate this conductance modulation by
analyzing the electronic structure of the helically-magnetized MWSM
Hamiltonian, and report tunable flat bands in the direction of transport in a
helically-magnetized region of the sample for Bloch and Neel-type domain walls
via the onset of a local axial Landau level spectrum within the bulk of the
superlattice. We show that Bloch devices also provide means for the generation
of chirality-polarized currents, which provides a path towards nanoelectronic
utilization of chirality as a new degree of freedom in spintronics.
The main aim of the present paper is to define an active matter in a quantum
framework and investigate difference and commonalities of quantum and classical
active matters. Although the research field of active matter has been expanding
wider, most research is conducted in classical systems. We here propose a truly
deterministic quantum active-matter model with a non-unitary quantum walk as
minimal models of quantum active matter. We aim to reproduce similar results
that Schweitzer et al. (1998) obtained with their classical active Brownian
particle; the Brownian particle, with a finite energy take-up, becomes active
and climbs up a potential wall. We realize such a system with non-unitary
quantum walks. We introduce new internal states, the ground and excited states,
and a new non-unitary operator for an asymmetric transition between the two
states. The non-Hermiticity parameter $g$ promotes transition to the excited
state and hence the particle takes up energy from the environment. We realize a
system without momentum conservation by manipulating a parameter $\theta$ for
the coin operator for a quantum walk; we utilize the property that the
continuum limit of a one-dimensional discrete-time quantum walk gives the Dirac
equation with its mass proportional to the parameter $\theta$ (Strauch, 2006).
With our quantum active particle, we successfully observe that the movement of
the quantum walker becomes more active in a non-trivial way as we increase the
non-Hermiticity parameter $g$, which is similar to the classical active
Brownian particle (Schweitzer et al., 1998). Meanwhile, we also observe three
unique features of quantum walks, namely, ballistic propagation of peaks in one
dimension, the walker staying on the constant energy plane in two dimensions,
and oscillations originating from the resonant transition between the ground
state and excited state both in one and two dimensions.
Crack-template-based transparent conductive films (TCFs) are promising kinds
of junction-free, metallic network electrodes that can be used, e.g., for
transparent electromagnetic interference (EMI) shielding. Using image
processing of published photos of TCFs, we have analyzed the topological and
geometrical properties of such crack templates. Additionally, we analyzed the
topological and geometrical properties of some computer-generated networks. We
computed the electrical conductance of such networks against the number density
of their cracks. Comparison of these computations with predictions of the two
analytical approaches revealed the proportionality of the electrical
conductance to the square root of the number density of the cracks was found,
this being consistent with the theoretical predictions.
Lee, Kim, and coworkers have recently claimed room-temperature and
ambient-pressure superconductivity in a copper-doped lead apatite material
named LK-99. However, the polycrystalline material synthesized has a
significant fraction of copper(I) sulfide. Copper(I) sulfide has a known phase
transition at 104 degrees C from an ordered low-temperature phase to a
high-temperature superionic phase. As a result of this phase transition,
copper(I) sulfide exhibits sharp transitions in electrical resistivity and heat
capacity, which are expected to coincide with the temperature-induced
transitions reported for LK-99. This implies that LK-99 must be synthesized
without any copper(I) sulfide to allow unambiguous validation of the
superconducting properties of LK-99.
We generalize the recent work of Shibata and Katsura, who considered a S=1/2
chain with alternating XX and YY couplings in the presence of dephasing, the
dynamics of which are described by the GKLS master equation. Their model is
equivalent to a non-Hermitian system described by the Kitaev formulation in
terms of a single Majorana species hopping on a two-leg ladder in the presence
of a nondynamical Z_2 gauge field. Our generalization involves Dirac gamma
matrix `spin' operators on the square lattice, and maps onto a non-Hermitian
square lattice bilayer which is also Kitaev-solvable. We describe the
exponentially many non-equilibrium steady states in this model. We identify how
the spin degrees of freedom can be accounted for in the 2d model in terms of
the gauge-invariant quantities and then proceed to study the Liouvillian
spectrum. We use a genetic algorithm to estimate the Liouvillian gap and the
first decay modes for large system sizes. We observe a transition in the first
decay modes, similar to that found by Shibata and Katsura. The results we
obtain are consistent with a perturbative analysis for small and large values
of the dissipation strength.
The interplay between strong correlations and topology can lead to the
emergence of intriguing quantum states of matter. One well-known example is the
fractional quantum Hall effect, where exotic electron fluids with fractionally
charged excitations form in partially filled Landau levels. The emergence of
topological moir\'e flat bands provides exciting opportunities to realize the
lattice analogs of both the integer and fractional quantum Hall states without
the need for an external magnetic field. These states are known as the integer
and fractional quantum anomalous Hall (IQAH and FQAH) states. Here, we present
direct transport evidence of the existence of both IQAH and FQAH states in
twisted bilayer MoTe2 (AA stacked). At zero magnetic field, we observe
well-quantized Hall resistance of h/e2 around moir\'e filling factor {\nu} = -1
(corresponding to one hole per moir\'e unit cell), and nearly-quantized Hall
resistance of 3h/2e2 around {\nu} = -2/3, respectively. Concomitantly, the
longitudinal resistance exhibits distinct minima around {\nu} = -1 and -2/3.
The application of an electric field induces topological quantum phase
transition from the IQAH state to a charge transfer insulator at {\nu} = -1,
and from the FQAH state to a generalized Wigner crystal state, further
transitioning to a metallic state at {\nu} = -2/3. Our study paves the way for
the investigation of fractionally charged excitations and anyonic statistics at
zero magnetic field based on semiconductor moir\'e materials.
In recent years a consensus has gradually been reached that the previously
proposed deconfined quantum critical point (DQCP) for spin-1/2 systems, an
archetypal example of quantum phase transition beyond the classic Landau's
paradigm, actually does not correspond to a true unitary conformal field theory
(CFT). In this work we carefully investigate another type of quantum phase
transition supposedly beyond the similar classic paradigm, the so called
``symmetric mass generation" (SMG) transition proposed in recent years. We
employ the sharp diagnosis including the scaling of disorder operator and
R\'enyi entanglement entropy in large-scale lattice model quantum Monte Carlo
simulations. Our results strongly suggest that the SMG transition is indeed an
unconventional quantum phase transition and it should correspond to a true
$(2+1)d$ unitary CFT.
Hydrogen-rich materials offer a compelling avenue towards room temperature
superconductivity, albeit under ultra-high pressure. However, the experimental
investigation of the electronic band structure remains elusive, due to the
inherent instability of most of the hydrogen-rich materials upon pressure
release. Very recently, nitrogen-doped lutetium hydride was claimed to host
room temperature superconductivity under near ambient pressure but was
disproven by following works. Upon decompression, nitrogen doped lutetium
hydride manifests a stable metallic phase with dark blue color. Moreover, high
temperature superconductivity has been reported in lutetium hydrides Lu4H23
(~71 K) under around 200 GPa. These properties engender an unprecedented
opportunity, allowing for the experimental investigation of the electronic band
structure intrinsic to hydrogen-rich material. In this work, using angle
resolved photoemission spectroscopy to investigate the non-superconducting
nitrogen doped lutetium hydride, we observed significant flat band and Van Hove
singularity marginally below the Fermi level. These salient features,
identified as critical elements, proffer potential amplifiers for the
realization of heightened superconductivity, as evidenced by prior research.
Our results not only unveil a confluence of potent strong correlation effects
and anisotropy within the Lu-H-N compound, but also provide a prospect for
engineering high temperature superconductivity through the strategic
manipulation of flat band and the VHS, effectively tailoring their alignment
with the Fermi energy.
Triphosphides, with a chemical formula of XP$_3$ (X is a group IIIA, IVA, or
VA element), have recently attracted much attention due to their great
potential in several applications. Here, using density functional theory
calculations, we describe for the first time the structural and electronic
properties of the bulk bismuth triphosphide (BiP$_3$). Phonon spectra and
molecular dynamics simulations confirm that the 3D crystal of BiP$_3$ is a
metal thermodynamically stable with no bandgap. Unlike the bulk, the mono-,
bi-, tri-, and tetra-layers of BiP$_3$ are semiconductors with a bandgap
ranging from 1.4 to 0.06 eV. However, stackings with more than five layers
exhibit metallic behavior equal to the bulk. The results show that quantum
confinement is a powerful tool for tuning the electronic properties of BiP$_3$
triphosphide, making it suitable for technological applications. Building on
this, the electronic properties of van der Waals heterostructure constructed by
graphene (G) and the BiP$_3$ monolayer (m-BiP$_3$) were investigated. Our
results show that the Dirac cone in graphene remains intact in this
heterostructure. At the equilibrium interlayer distance, the G/m-BiP$_3$ forms
an n-type contact with a Schottky barrier height of 0.5 eV. It is worth noting
that the SHB in the G/m-BiP$_3$ heterostructure can be adjusted by changing the
interlayer distance or applying a transverse electric field. Thus, we show that
few-layers BiP$_3$ is an interesting material for realizing nanoelectronic and
optoelectronic devices and is an excellent option for designing Schottky
nanoelectronic devices.
Two dimensional conformal feld theories have been extensively studied in the
past. When considered on the torus, they are strongly constrained by modular
invariance. However, introducing relevant deformations or chemical potentials
pushes these theories away from criticality, where many of their aspects are
still poorly understood. In this note we make a step towards filling this gap,
by analyzing the theory of a Dirac fermion on the torus, deformed by a mass
term and a chemical potential for the particle number symmetry. The theory
breaks conformal and Lorentz invariance, and we study its spectrum and
partition function. We also focus on two limits that are interesting on their
own right: a massless relativistic fermion with nonzero chemical potential (a
simple model for CFTs at finite density), and nonrelativistic Schrodinger
fermions (of relevance in condensed matter systems). Taking inspiration from
recent developments in massive modular forms, we obtain a representation of the
torus free energy based on Fourier-transforming over a twisted boundary
condition. This dual representation fullfills many properties analogous to
modular invariance in CFTs. In particular, we use this result to derive
Cardy-like formulas for the high energy density of states of these theories.

Date of feed: Mon, 11 Sep 2023 00:30:00 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Time- and Angle-Resolved Photoemission Studies of Quantum Materials. (arXiv:2309.03935v1 [cond-mat.str-el])**

Fabio Boschini, Marta Zonno, Andrea Damascelli

**Disorder in the non-linear anomalous Hall effect of $\mathcal{P}\mathcal{T}$-symmetric Dirac fermions. (arXiv:2309.03947v1 [cond-mat.mes-hall])**

Rhonald Burgos Atencia, Di Xiao, Dimitrie Culcer

**Edge theory of the non-Hermitian skin modes in higher dimensions. (arXiv:2309.03950v1 [cond-mat.mes-hall])**

Kai Zhang, Zhesen Yang, Kai Sun

**3D Topological Semimetal Phases of Strained $\alpha$-Sn on Insulating Substrate. (arXiv:2309.03951v1 [cond-mat.mtrl-sci])**

Jakub Polaczyński, Gauthier Krizman, Alexandr Kazakov, Bartłomiej Turowski, Joaquin Bermejo Ortiz, Rafał Rudniewski, Tomasz Wojciechowski, Piotr Dłużewski, Marta Aleszkiewicz, Wojciech Zaleszczyk, Bogusława Kurowska, Zahir Muhammad, Marcin Rosmus, Natalia Olszowska, Louis-Anne De Vaulchier, Yves Guldner, Tomasz Wojtowicz, Valentine V. Volobuev

**A contactless scanning near-field optical dilatometer imaging the thermal expansivity of inhomogeneous 2D materials and thin films at the nanoscale. (arXiv:2309.04017v1 [physics.app-ph])**

Victor Wong, Sabastine Ezugwu, Giovanni Fanchini

**Ab initio calculations of low-energy quasiparticle lifetimes in bilayer graphene. (arXiv:2309.04048v1 [cond-mat.mes-hall])**

Catalin D. Spataru, François Léonard

**Microwave spectroscopy of Majorana vortex modes. (arXiv:2309.04050v1 [cond-mat.supr-con])**

Zhibo Ren, Justin Copenhaver, Leonid Rokhinson, Jukka I. Väyrynen

**Observation of Hybrid-Order Topological Pump in a Kekule-Textured Graphene Lattice. (arXiv:2309.04051v1 [cond-mat.mes-hall])**

Tianzhi Xia, Yuzeng Li, Qicheng Zhang, Xiying Fan, Meng Xiao, Chunyin Qiu

**Chiral magneto-phonons with tunable topology in anisotropic quantum magnets. (arXiv:2309.04064v1 [cond-mat.mes-hall])**

Bowen Ma, Z. D. Wang, Gang Chen

**Driven Majorana Modes: A Route to Synthetic $p_x+ip_y$ Superconductivity. (arXiv:2309.04155v1 [cond-mat.supr-con])**

Lingyu Yang, Gia-Wei Chern, Shi-Zeng Lin

**Metastable Charge Distribution Between Degenerate Landau Levels. (arXiv:2309.04166v1 [cond-mat.mes-hall])**

Wenlu Lin, Xing Fan, Lili Zhao, Yoon Jang Chung, Adbhut Gupta, Kirk W. Baldwin, Loren Pfeiffer, Hong Lu, Yang Liu

**Comment on "Extending the Laws of Thermodynamics for Arbitrary Autonomous Quantum Systems". (arXiv:2309.04170v1 [quant-ph])**

Philipp Strasberg

**Two-dimensional Discommensurations: an extension to McMillan's Ginzburg-Landau Theory. (arXiv:2309.04201v1 [cond-mat.str-el])**

Lotte Mertens, Jeroen van den Brink, Jasper van Wezel

**Symmetry-Enriched Criticality in a Coupled Spin-Ladder. (arXiv:2309.04205v1 [cond-mat.str-el])**

Suman Mondal, Adhip Agarwala, Tapan Mishra, Abhishodh Prakash

**Interband scattering- and nematicity-induced quantum oscillation frequency in FeSe. (arXiv:2309.04237v1 [cond-mat.str-el])**

Valentin Leeb, Johannes Knolle

**Programmable Real-Time Magnon Interference in Two Remotely Coupled Magnonic Resonators. (arXiv:2309.04289v1 [cond-mat.mes-hall])**

Moojune Song, Tomas Polakovic, Jinho Lim, Thomas W. Cecil, John Pearson, Ralu Divan, Wai-Kwong Kwok, Ulrich Welp, Axel Hoffmann, Kab-Jin Kim, Valentine Novosad, Yi Li

**Universal diffusion of dendrimers in a semidilute solution of linear polymers. (arXiv:2309.04290v1 [cond-mat.soft])**

Silpa Mariya, Jeremy J. Barr, P. Sunthar, J. Ravi Prakash

**Spin transport properties in a topological insulator sandwiched between two-dimensional magnetic layers. (arXiv:2309.04301v1 [cond-mat.mes-hall])**

Nezhat Pournaghavi, Banasree Sadhukhan, Anna Delin

**Cascade of multi-electron bubble phases in monolayer graphene at high Landau level filling. (arXiv:2309.04319v1 [cond-mat.mes-hall])**

Fangyuan Yang, Ruiheng Bai, Alexander A. Zibrov, Sandeep Joy, Takashi Taniguchi, Kenji Watanabe, Brian Skinner, Mark O. Goerbig, Andrea F. Young

**Understanding the role of Hubbard corrections in the rhombohedral phase of BaTiO$_3$. (arXiv:2309.04348v1 [cond-mat.mtrl-sci])**

G. Gebreyesus, Lorenzo Bastonero, Michele Kotiuga, Nicola Marzari, Iurii Timrov

**Strong relevance of Zinc impurity in the spin-$\frac{1}{2}$ Kagome quantum antiferromagnets: a variational study. (arXiv:2309.04363v1 [cond-mat.str-el])**

Jianhua Yang, Tao Li

**Single-molecule time-resolved spectroscopy in a tunable STM nanocavity. (arXiv:2309.04416v1 [cond-mat.mes-hall])**

Jiří Doležal, Amandeep Sagwal, Rodrigo Cezar de Campos Ferreira, Martin Švec

**Sequences of dislocation reactions and helicity transformations in tubular crystals. (arXiv:2309.04417v1 [cond-mat.soft])**

Andrei Zakharov, Daniel A. Beller

**Quantum work statistics of controlled evolutions. (arXiv:2309.04419v1 [quant-ph])**

Steve Campbell

**Antiskyrmionic ferroelectric medium. (arXiv:2303.07389v2 [cond-mat.mtrl-sci] UPDATED)**

Mauro A. P. Gonçalves, Marek Paściak, Jiří Hlinka

**Flat bands and multi-state memory devices from chiral domain wall superlattices in magnetic Weyl semimetals. (arXiv:2303.16918v2 [cond-mat.mes-hall] UPDATED)**

Vivian Rogers, Swati Chaudhary, Richard Nguyen, Jean Anne Incorvia

**Defining a quantum active particle using a non-unitary quantum walk. (arXiv:2305.15319v2 [quant-ph] UPDATED)**

Manami Yamagishi, Naomichi Hatano, Hideaki Obuse

**Electrical conductivity of crack-template-based transparent conductive films: A computational point of view. (arXiv:2307.01509v2 [cond-mat.dis-nn] UPDATED)**

Yuri Yu. Tarasevich, Andrei V. Eserkepov, Irina V. Vodolazskaya

**Superionic phase transition of copper(I) sulfide and its implication for purported superconductivity of LK-99. (arXiv:2308.05222v3 [cond-mat.supr-con] UPDATED)**

Prashant K. Jain

**A study of dissipative models based on Dirac matrices. (arXiv:2308.05245v2 [quant-ph] UPDATED)**

Jyotsna Gidugu, Daniel P. Arovas

**Observation of integer and fractional quantum anomalous Hall effects in twisted bilayer MoTe2. (arXiv:2308.06177v3 [cond-mat.mes-hall] UPDATED)**

Fan Xu, Zheng Sun, Tongtong Jia, Chang Liu, Cheng Xu, Chushan Li, Yu Gu, Kenji Watanabe, Takashi Taniguchi, Bingbing Tong, Jinfeng Jia, Zhiwen Shi, Shengwei Jiang, Yang Zhang, Xiaoxue Liu, Tingxin Li

**Disorder Operator and R\'enyi Entanglement Entropy of Symmetric Mass Generation. (arXiv:2308.07380v3 [cond-mat.str-el] UPDATED)**

Zi Hong Liu, Yuan Da Liao, Gaopei Pan, Menghan Song, Jiarui Zhao, Weilun Jiang, Chao-Ming Jian, Yi-Zhuang You, Fakher F. Assaad, Zi Yang Meng, Cenke Xu

**Observation of Flat Band and Van Hove Singularity in Non-superconducting Nitrogen-doped Lutetium Hydride. (arXiv:2308.16420v2 [cond-mat.supr-con] UPDATED)**

Xin Liang, Zihan Lin, Jun Zhang, Jianfa Zhao, Shiyu Feng, Wenlong Lu, Guodong Wang, Luchuan Shi, Ningning Wang, Pengfei Shan, Zao Zhang, Muntaser Naamneh, Runzhe Liu, Bastien Michon, Jinguang Cheng, Changqing Jin, Yang Ren, Junzhang Ma

**Unveiling the electronic properties of BiP$_3$ triphosphide from bulk to graphene-based heterostructure by first-principles calculations. (arXiv:2309.02216v2 [cond-mat.mtrl-sci] UPDATED)**

Dominike P. de Andrade Deus, Igor S. S. de Oliveira, Roberto Hiroki Miwa, Erika N. Lima

**Nonrelativistic Dirac fermions on the torus. (arXiv:2309.03302v1 [hep-th] CROSS LISTED)**

Jeremías Aguilera-Damia, Mario Solís, Gonzalo Torroba

Found 18 papers in nano-lett

Date of feed: Sun, 10 Sep 2023 13:16:15 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] Determining the Number of Graphene Nanoribbons in Dual-Gate Field-Effect Transistors**

Jian Zhang, Gabriela Borin Barin, Roman Furrer, Cheng-Zhuo Du, Xiao-Ye Wang, Klaus Müllen, Pascal Ruffieux, Roman Fasel, Michel Calame, and Mickael L. PerrinNano LettersDOI: 10.1021/acs.nanolett.3c01931

**[ASAP] Ultrafast Electronic Dynamics in Anisotropic Indirect Interlayer Excitonic States of Monolayer WSe2/ReS2 Heterojunctions**

Yulu Qin, Rui Wang, Xiaoyuan Wu, Yunkun Wang, Xiaofang Li, Yunan Gao, Liangyou Peng, Qihuang Gong, and Yunquan LiuNano LettersDOI: 10.1021/acs.nanolett.3c02488

**[ASAP] Toward High-Peak-to-Valley-Ratio Graphene Resonant Tunneling Diodes**

Zihao Zhang, Baoqing Zhang, Yiming Wang, Mingyang Wang, Yifei Zhang, Hu Li, Jiawei Zhang, and Aimin SongNano LettersDOI: 10.1021/acs.nanolett.3c02281

**[ASAP] Kinetics of Nanobubbles in Tiny-Angle Twisted Bilayer Graphene**

Chao Yan, Ya-Xin Zhao, Yi-Wen Liu, and Lin HeNano LettersDOI: 10.1021/acs.nanolett.3c02286

**[ASAP] One-Step Passivation of Both Sulfur Vacancies and SiO2 Interface Traps of MoS2 Device**

Byungwook Ahn, Yoonsok Kim, Meeree Kim, Hyang Mi Yu, Jaehun Ahn, Eunji Sim, Hyunjin Ji, Hamza Zad Gul, Keun Soo Kim, Kyuwook Ihm, Hyoyoung Lee, Eun Kyu Kim, and Seong Chu LimNano LettersDOI: 10.1021/acs.nanolett.3c01753

**[ASAP] Spatial Precision Tailoring the Catalytic Activity of Graphene Monolayers for Designing Janus Swimmers**

Ruchao Gao, S. Mohsen Beladi-Mousavi, Gerardo Salinas, Patrick Garrigue, Lin Zhang, and Alexander KuhnNano LettersDOI: 10.1021/acs.nanolett.3c02314

**[ASAP] Pseudospin Polarized Dual-Higher-Order Topology in Hydrogen-Substituted Graphdiyne**

Tingfeng Zhang, Tianyi Hu, Yongqi Zhang, and Zhengfei WangNano LettersDOI: 10.1021/acs.nanolett.3c02684

**[ASAP] Direct Visualization of the Charge Transfer in a Graphene/α-RuCl3 Heterostructure via Angle-Resolved Photoemission Spectroscopy**

Antonio Rossi, Cameron Johnson, Jesse Balgley, John C. Thomas, Luca Francaviglia, Riccardo Dettori, Andreas K. Schmid, Kenji Watanabe, Takashi Taniguchi, Matthew Cothrine, David G. Mandrus, Chris Jozwiak, Aaron Bostwick, Erik A. Henriksen, Alexander Weber-Bargioni, and Eli RotenbergNano LettersDOI: 10.1021/acs.nanolett.3c01974

**[ASAP] Observation of Termination-Dependent Topological Connectivity in a Magnetic Weyl Kagome Lattice**

Federico Mazzola, Stefan Enzner, Philipp Eck, Chiara Bigi, Matteo Jugovac, Iulia Cojocariu, Vitaliy Feyer, Zhixue Shu, Gian Marco Pierantozzi, Alessandro De Vita, Pietro Carrara, Jun Fujii, Phil D. C. King, Giovanni Vinai, Pasquale Orgiani, Cephise Cacho, Matthew D. Watson, Giorgio Rossi, Ivana Vobornik, Tai Kong, Domenico Di Sante, Giorgio Sangiovanni, and Giancarlo PanaccioneNano LettersDOI: 10.1021/acs.nanolett.3c02022

**[ASAP] Robust Luttinger Liquid State of 1D Dirac Fermions in a Van der Waals System Nb9Si4Te18**

Qirong Yao, Hyunjin Jung, Kijeong Kong, Chandan De, Jaeyoung Kim, Jonathan D. Denlinger, and Han Woong YeomNano LettersDOI: 10.1021/acs.nanolett.3c01789

**[ASAP] Ultraflat Graphene Oxide Membranes with Newton-Ring Prepared by Vortex Shear Field for Ion Sieving**

Tianqi Liu, Xin Zhang, Jing Liang, Wenbin Liang, Wei Qi, Longlong Tian, Lijuan Qian, Zhan Li, and Ximeng ChenNano LettersDOI: 10.1021/acs.nanolett.3c02613

**[ASAP] Photoinduced Nonvolatile Resistive Switching Behavior in Oxygen-Doped MoS2 for a Neuromorphic Vision System**

Ke Chang, Xinhui Zhao, Xinna Yu, Zhikai Gan, Renzhi Wang, Anhua Dong, Zhuyikang Zhao, Yafei Zhang, and Hui WangNano LettersDOI: 10.1021/acs.nanolett.3c02499

**[ASAP] Coherent Phonons in van der Waals MoSe2/WSe2 Heterobilayers**

Changxiu Li, Alexey V. Scherbakov, Pedro Soubelet, Anton K. Samusev, Claudia Ruppert, Nilanthy Balakrishnan, Vitalyi E. Gusev, Andreas V. Stier, Jonathan J. Finley, Manfred Bayer, and Andrey V. AkimovNano LettersDOI: 10.1021/acs.nanolett.3c02316

**[ASAP] Uncooled Mid-Infrared Sensing Enabled by Chip-Integrated Low-Temperature-Grown 2D PdTe2 Dirac Semimetal**

Longhui Zeng, Wei Han, Xiaoyan Ren, Xue Li, Di Wu, Shujuan Liu, Hao Wang, Shu Ping Lau, Yuen Hong Tsang, Chong-Xin Shan, and Jiansheng JieNano LettersDOI: 10.1021/acs.nanolett.3c02396

**[ASAP] Switching the Moiré Lattice Models in the Twisted Bilayer WSe2 by Strain or Pressure**

Yifan Gao, Qiaoling Xu, M. Umar Farooq, Lede Xian, and Li HuangNano LettersDOI: 10.1021/acs.nanolett.3c01756

**[ASAP] Trapping Hydrogen Molecules between Perfect Graphene**

Jie Xu, Weilin Liu, Wenna Tang, Gan Liu, Yujian Zhu, Guowen Yuan, Lei Wang, Xiaoxiang Xi, and Libo GaoNano LettersDOI: 10.1021/acs.nanolett.3c02321

**[ASAP] Elastocaloric Effect in Graphene Kirigami**

Luiz A. Ribeiro Junior, Marcelo L. Pereira Junior, and Alexandre F. FonsecaNano LettersDOI: 10.1021/acs.nanolett.3c02260

**[ASAP] Spatially Coherent Tip-Enhanced Raman Spectroscopy Measurements of Electron–Phonon Interaction in a Graphene Device**

Rafael Battistella Nadas, Andreij C. Gadelha, Tiago C. Barbosa, Cassiano Rabelo, Thiago de Lourenço e Vasconcelos, Vitor Monken, Ary V. R. Portes, Kenji Watanabe, Takashi Taniguchi, Jhonattan C. Ramirez, Leonardo C. Campos, Riichiro Saito, Luiz Gustavo Cançado, and Ado JorioNano LettersDOI: 10.1021/acs.nanolett.3c00851

Found 19 papers in acs-nano

Date of feed: Sun, 10 Sep 2023 13:13:48 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] Direct Observation of Locally Modified Excitonic Effects within a Moiré Unit Cell in Twisted Bilayer Graphene**

Ming Liu, Ryosuke Senga, Masanori Koshino, Yung-Chang Lin, and Kazu SuenagaACS NanoDOI: 10.1021/acsnano.3c06021

**[ASAP] Chirality-Induced Spin Selectivity in Supramolecular Chirally Functionalized Graphene**

Seyedamin Firouzeh, Sara Illescas-Lopez, Md Anik Hossain, Juan Manuel Cuerva, Luis Álvarez de Cienfuegos, and Sandipan PramanikACS NanoDOI: 10.1021/acsnano.3c06903

**[ASAP] On-Surface Synthesis of Graphene Nanoribbons with Atomically Precise Structural Heterogeneities and On-Site Characterizations**

Ruoting Yin, Zhengya Wang, Shijing Tan, Chuanxu Ma, and Bing WangACS NanoDOI: 10.1021/acsnano.3c06128

**[ASAP] Chemical Amplification-Enabled Topological Modification of Nucleic Acid Aptamers for Enhanced Cancer-Targeted Theranostics**

Hong Chen, Yazhou Li, Zhenzhen Xiao, Jili Li, Ting Li, Zhiqiang Wang, Yanlan Liu, and Weihong TanACS NanoDOI: 10.1021/acsnano.3c01955

**[ASAP] Bulk Photovoltaic Effect in Two-Dimensional Distorted MoTe2**

Sikandar Aftab, Muhammad Arslan Shehzad, Hafiz Muhammad Salman Ajmal, Fahmid Kabir, Muhammad Zahir Iqbal, and Abdullah A. Al-KahtaniACS NanoDOI: 10.1021/acsnano.3c03593

**[ASAP] Promoted Electronic Coupling of Acoustic Phonon Modes in Doped Semimetallic MoTe2**

Xiangyue Cui, Hejin Yan, Xuefei Yan, Kun Zhou, and Yongqing CaiACS NanoDOI: 10.1021/acsnano.3c01229

**[ASAP] Toward Edge Engineering of Two-Dimensional Layered Transition-Metal Dichalcogenides by Chemical Vapor Deposition**

Wei Fu, Mark John, Thathsara D. Maddumapatabandi, Fabio Bussolotti, Yong Sean Yau, Ming Lin, and Kuan Eng Johnson GohACS NanoDOI: 10.1021/acsnano.3c04581

**[ASAP] Influence of the Magnetic Tip on Heterodimers in Electron Spin Resonance Combined with Scanning Tunneling Microscopy**

Xue Zhang, Jose Reina-Gálvez, Christoph Wolf, Yu Wang, Hervé Aubin, Andreas J. Heinrich, and Taeyoung ChoiACS NanoDOI: 10.1021/acsnano.3c04024

**[ASAP] Multimodal E-Textile Enabled by One-Step Maskless Patterning of Femtosecond-Laser-Induced Graphene on Nonwoven, Knit, and Woven Textiles**

Dongwook Yang, Han Ku Nam, Truong-Son Dinh Le, Jinwook Yeo, Younggeun Lee, Young-Ryeul Kim, Seung-Woo Kim, Hak-Jong Choi, Hyung Cheoul Shim, Seunghwa Ryu, Soongeun Kwon, and Young-Jin KimACS NanoDOI: 10.1021/acsnano.3c04120

**[ASAP] Nonlinear Optical Responses of Janus MoSSe/MoS2 Heterobilayers Optimized by Stacking Order and Strain**

Nguyen Tuan Hung, Kunyan Zhang, Vuong Van Thanh, Yunfan Guo, Alexander A. Puretzky, David B. Geohegan, Jing Kong, Shengxi Huang, and Riichiro SaitoACS NanoDOI: 10.1021/acsnano.3c04436

**[ASAP] Direct Synthesis of Elastic and Stretchable Hierarchical Structured Fiber and Graphene-Based Sponges for Noise Reduction**

Dingding Zong, Wenya Bai, Meng Geng, Xia Yin, Fei Wang, Jianyong Yu, Shichao Zhang, and Bin DingACS NanoDOI: 10.1021/acsnano.3c06921

**[ASAP] Controlled Formation of Fused Metal Chalcogenide Nanoclusters Using Soft Landing of Gaseous Fragment Ions**

Habib Gholipour-Ranjbar, Hugo Y. Samayoa-Oviedo, and Julia LaskinACS NanoDOI: 10.1021/acsnano.3c05545

**[ASAP] Two-Step Flux Synthesis of Ultrapure Transition-Metal Dichalcogenides**

Song Liu, Yang Liu, Luke Holtzman, Baichang Li, Madisen Holbrook, Jordan Pack, Takashi Taniguchi, Kenji Watanabe, Cory R. Dean, Abhay N. Pasupathy, Katayun Barmak, Daniel A. Rhodes, and James HoneACS NanoDOI: 10.1021/acsnano.3c02511

**[ASAP] Electroluminescence from Megasonically Solution-Processed MoS2 Nanosheet Films**

Sonal V. Rangnekar, Vinod K. Sangwan, Mengru Jin, Maryam Khalaj, Beata M. Szydłowska, Anushka Dasgupta, Lidia Kuo, Heather E. Kurtz, Tobin J. Marks, and Mark C. HersamACS NanoDOI: 10.1021/acsnano.3c06034

**[ASAP] Electrochemical Li+ Insertion/Extraction Reactions at LiPON/Epitaxial Graphene Interfaces**

Satoshi Yamamoto, Munekazu Motoyama, Masahiko Suzuki, Ryotaro Sakakibara, Norikazu Ishigaki, Akichika Kumatani, Wataru Norimatsu, and Yasutoshi IriyamaACS NanoDOI: 10.1021/acsnano.3c00158

**[ASAP] Sub-5 nm Contacts and Induced p–n Junction Formation in Individual Atomically Precise Graphene Nanoribbons**

Pin-Chiao Huang, Hongye Sun, Mamun Sarker, Christopher M. Caroff, Gregory S. Girolami, Alexander Sinitskii, and Joseph W. LydingACS NanoDOI: 10.1021/acsnano.3c02794

**[ASAP] Ultrafast Electronic Relaxation Dynamics of Atomically Thin MoS2 Is Accelerated by Wrinkling**

Ce Xu, Guoqing Zhou, Evgeny M. Alexeev, Alisson R. Cadore, Ioannis Paradisanos, Anna K. Ott, Giancarlo Soavi, Sefaattin Tongay, Giulio Cerullo, Andrea C. Ferrari, Oleg V. Prezhdo, and Zhi-Heng LohACS NanoDOI: 10.1021/acsnano.3c02917

**[ASAP] Edge Contacts to Atomically Precise Graphene Nanoribbons**

Wenhao Huang, Oliver Braun, David I. Indolese, Gabriela Borin Barin, Guido Gandus, Michael Stiefel, Antonis Olziersky, Klaus Müllen, Mathieu Luisier, Daniele Passerone, Pascal Ruffieux, Christian Schönenberger, Kenji Watanabe, Takashi Taniguchi, Roman Fasel, Jian Zhang, Michel Calame, and Mickael L. PerrinACS NanoDOI: 10.1021/acsnano.3c00782

**[ASAP] Ultra-Wideband Mid-Infrared Chalcogenide Suspended Nanorib Waveguide Gas Sensors with Exceptionally High External Confinement Factor beyond Free-Space**

Mingquan Pi, Chuantao Zheng, Huan Zhao, Zihang Peng, Gangyun Guan, Jialin Ji, Yijun Huang, Yuting Min, Lei Liang, Fang Song, Xue Bai, Yu Zhang, Yiding Wang, and Frank K. TittelACS NanoDOI: 10.1021/acsnano.3c02699

Found 1 papers in scipost **Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+)|(flatband)|(flat.{1}band)|(LK.{1}99) **Exact multi-instantons in topological string theory, by Jie Gu, Marcos Mariño**

< author missing >

Submitted on 2023-09-11, refereeing deadline 2023-10-17.