Found 29 papers in cond-mat Anomalies of global symmetries are important tools for understanding the
dynamics of quantum systems. We investigate anomalies of non-invertible
symmetries in 3+1d using 4+1d bulk topological quantum field theories given by
Abelian two-form gauge theories, with a 0-form permutation symmetry. Gauging
the 0-form symmetry gives the 4+1d "inflow" symmetry topological field theory
for the non-invertible symmetry. We find a two levels of anomalies: (1) the
bulk may fail to have an appropriate set of loop excitations which can condense
to trivialize the boundary dynamics, and (2) the "Frobenius-Schur indicator" of
the non-invertible symmetry (generalizing the Frobenius-Schur indicator of 1+1d
fusion categories) may be incompatible with trivial boundary dynamics. As a
consequence we derive conditions for non-invertible symmetries in 3+1d to be
compatible with symmetric gapped phases, and invertible gapped phases. Along
the way, we see that the defects characterizing $\mathbb{Z}_{4}$ ordinary
symmetry host worldvolume theories with time-reversal symmetry $\mathsf{T}$
obeying the algebra $\mathsf{T}^{2}=C$ or $\mathsf{T}^{2}=(-1)^{F}C,$ with $C$
a unitary charge conjugation symmetry. We classify the anomalies of this
symmetry algebra in 2+1d and further use these ideas to construct 2+1d
topological orders with non-invertible time-reversal symmetry that permutes
anyons. As a concrete realization of our general discussion, we construct new
lattice Hamiltonian models in 3+1d with non-invertible symmetry, and constrain
their dynamics.
Strongly correlated phases in twisted bilayer graphene (TBG) typically arise
as transitions from a state in which the system behaves as a normal metal. In
such metallic regime, electron-electron interactions usually only play a
subleading role in transport measurements, compared to the dominant scattering
mechanism. Here, we propose and theoretically study an exception to this based
on a Coulomb drag setup between two metallic TBG, separated so that they only
couple through many-body interactions. We find that by solely varying the twist
angle equally in both TBG, the drag resistivity exhibits a unique maximum as
the system crossovers from a degenerate to a nondegenerate regime. When the
twist angles in each TBG differ, we find an anomalous drag resistivity
characterized by the appearance of multiple peaks. We show that this behavior
can be related to the dependence of the rectification function on the twist
angle.
Quantum spin liquids (QSLs) have become a key area of research in magnetism
due to their remarkable properties, such as long-range entanglement, fractional
excitations, pinch-point singularities, and topologically protected phenomena.
In recent years, the search for QSLs has expanded into the three-dimensional
world, where promising features have been found in materials that form
pyrochlore and hyper-kagome lattices, despite the suppression of quantum
fluctuations due to high dimensionality. One such material is the $S = 1$
K$_2$Ni$_2$(SO$_4$)$_3$ compound, which belongs to the langbeinite family
consisting of two interconnected trillium lattices. Although magnetically
ordered, K$_2$Ni$_2$(SO$_4$)$_3$ has been found to exhibit a highly dynamical
and correlated state which can be driven into a pure quantum spin liquid under
magnetic fields of only $B \simeq 4$~T. In this article, we combine inelastic
neutron scattering measurements with pseudo-fermion functional renormalization
group (PFFRG) and classical Monte Carlo (cMC) calculations to study the
magnetic properties of K$_2$Ni$_2$(SO$_4$)$_3$, revealing a high level of
agreement between the experiment and theory. We further reveal the origin of
the dynamical state in K$_2$Ni$_2$(SO$_4$)$_3$ by studying a larger set of
exchange parameters, uncovering an `island of liquidity' around a focal point
given by a magnetic network composed of tetrahedra on a trillium lattice.
The recent experimental claim of room-temperature ambient-pressure
superconductivity in a Cu-doped lead-apatite (LK-99) has ignited substantial
research interest in both experimental and theoretical domains. Previous
collinear density functional theory (DFT) calculations with the inclusion of an
on-site Hubbard interaction $U$ consistently predict the presence of flat bands
crossing the Fermi level. This is in contrast to DFT plus dynamical mean field
theory calculations, which reveal the Mott insulating behavior for the
stoichiometric Pb$_{9}$Cu(PO$_4$)$_6$O compound. However, the existing
calculations are all based on the $P6_3/m$ structure, which is argued to be not
the ground-state structure. Here, we revisit the electronic structure of
Pb$_{9}$Cu(PO$_4$)$_6$O with the energetically more favorable $P\bar{3}$
structure, fully taking into account the crystal structure and electronic
symmetry breaking. We examine all possible configurations for Cu substituting
the Pb sites. Our results show that the doped Cu atoms exhibit a preference for
substituting the Pb2 sites than the Pb1 sites. In both cases, the calculated
substitutional formation energies are large, indicating the difficulty in
incorporating Cu at Pb sites. We find that most of structures with Cu at the
Pb2 site tend to exhibit insulating states, while the structures with both two
Cu atoms at the Pb1 sites (except one configuration) are predicted to be
metallic by magnetically collinear DFT+$U$ calculations. However, when
accounting for the electronic symmetry breaking, some Cu-doped configurations
(including the one employed in previous DFT+$U$ calculations) become
insulating. Our work highlights the importance of symmetry breaking in
obtaining correct electronic state for Pb$_{9}$Cu(PO$_4$)$_6$O, thereby
reconciling previous collinear DFT+$U$ and DFT+DMFT calculations.
Finding materials exhibiting superconductivity at room temperature has long
been one of the ultimate goals in physics and material science. Recently,
room-temperature superconducting properties have been claimed in a copper
substituted lead phosphate apatite (Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O, or called
LK-99) [1-3]. Using a similar approach, we have prepared LK-99 like samples and
confirmed the half-levitation behaviors in some small specimens under the
influence of a magnet at room temperature. To examine the magnetic properties
of our samples, we have performed systematic magnetization measurements on the
as-grown LK-99-like samples, including the half-levitated and non-levitated
samples. The magnetization measurements show the coexistence of
soft-ferromagnetic and diamagnetic signals in both half-levitated and
non-levitated samples. The electrical transport measurements on the as-grown
LK-99-like samples including both half-levitated and non-levitated samples show
an insulating behavior characterized by the increasing resistivity with the
decreasing temperature.
Skyrmionic devices exhibit energy-efficient and high-integration data storage
and computing capabilities due to their small size, topological protection, and
low drive current requirements. So, to realize these devices, an extensive
study, from fundamental physics to practical applications, becomes essential.
In this article, we present an exhaustive review of the advancements in
understanding the fundamental physics behind magnetic skyrmions and the novel
data storage and computing technologies based on them. We begin with an
in-depth discussion of fundamental concepts such as topological protection,
stability, statics and dynamics essential for understanding skyrmions,
henceforth the foundation of skyrmion technologies. For the realization of
CMOS-compatible skyrmion functional devices, the writing and reading of the
skyrmions are crucial. We discuss the developments in different writing schemes
such as STT, SOT, and VCMA. The reading of skyrmions is predominantly achieved
via two mechanisms: the Magnetoresistive Tunnel Junction (MTJ) TMR effect and
topological resistivity (THE). So, a thorough investigation into the Skyrmion
Hall Effect, topological properties, and emergent fields is also provided,
concluding the discussion on skyrmion reading developments. Based on the
writing and reading schemes, we discuss the applications of the skyrmions in
conventional logic, unconventional logic, memory applications, and neuromorphic
computing in particular. Subsequently, we present an overview of the potential
of skyrmion-hosting Majorana Zero Modes (MZMs) in the emerging Topological
Quantum Computation and helicity-dependent skyrmion qubits.
The dispersion component of the van der Waals (vdW) interaction in
low-dimensional metals is known to exhibit anomalous "Type-C non-additivity"
[Int. J. Quantum Chem. 114, 1157 (2014)]. This causes dispersion energy
behavior, at asymptotically large separations, that is missed by popular
atom-based schemes for dispersion energy calculations. For example, the
dispersion interaction energy between parallel metallic nanotubes at separation
$D$ falls off aymptotically as approximately $D^{-2}$, whereas current
atom-based schemes predict $D^{-5}$ asymptotically. To date it has not been
clear whether current atom-based theories also give the dispersion interaction
inaccurately at smaller separations for low-dimensional metals.
Here we introduce a new theory that we term "MBD+C" . It permits inclusion of
Type C effects efficiently within atom-based dispersion energy schemes such as
Many Body Dispersion (MBD) and Universal MBD (uMBD). This allows us to
investigate asymptotic, intermediate and near-contact regimes with equal
accuracy. (The large contact energy of intimate metallic bonding is not
primarily governed by dispersion energy and is described well by semi-local
density functional theory.) Here we apply a simplified version,"nn-MBD+C", of
our new theory to calculate the dispersion interaction for three
low-dimensional metallic systems: parallel metallic chains of gold atoms,
parallel Li-doped graphene sheets; and parallel (4,4) armchair carbon
nanotubes. In addition to giving the correct asymptotic behavior, the new
theory seamlessly gives the dispersion energy down to near-contact geometry,
where it is similar to MBD but can give up to 15% more dispersion energy than
current MBD schemes, in the systems studied so far. This percentage increases
with separation until nn-MBD+C dominates MBD at asymptotic separations.
PbSe, a predicted two-dimensional (2D) topological crystalline insulator
(TCI) in the monolayer limit, possess excellent thermoelectric and infrared
optical properties. Native defects in PbSe take a crucial role for the
applications. However, little attention has been paid to the defect induced
doping characteristics. Here, we provide an experimental and theoretical
investigation of defects induced p-type characteristic on epitaxial monolayer
PbSe on Au(111). Scanning tunneling microscopy (STM) measurements demonstrate
an epitaxial PbSe monolayer with a fourfold symmetric lattice. Combined
scanning tunneling spectroscopy (STS) and density functional theory (DFT)
calculations reveal a quasi-particle bandgap of 0.8eV of PbSe. STM results
unveil that there are two types of defects on the surface, one is related the
vacancies of Pb atoms and the other is the replacement of the absent Se atoms
by Pb. Corresponding theoretical optimization confirms the structures of the
defects. More importantly, both STS measurements and DFT calculations give
evidence that the Pb vacancies move the Fermi energy inside the valence band
and produce extra holes, leading to p-type characteristics of PbSe. Our work
provides effective information for the future research of device performance
based on PbSe films.
We investigate the effect of elastic strain on a Mach-Zehnder (MZ)
interferometer created by graphene p-n junction in quantum Hall regime. We
demonstrate that a Gaussian-shaped nanobubble causes detuning of the quantum
Hall conductance oscillations across the p-n junction, due to the
strain-induced local pseudo-magnetic fields. By performing a
machine-learning-based Fourier analysis, we differentiate the
nanobubble-induced Fourier component from the conductance oscillations
originating from the external magnetic fields. We show that the detuning of the
conductance oscillations is due to the altered pathway of quantum Hall
interface channels caused by the strain-induced pseudo-magnetic fields. In the
presence of the nanobubble, a new Fourier component for a magnetic flux
$\Phi_{0}/2$ appears, and the corresponding MZ interferometry indicates that
the enclosed area is reduced by half due to the strain-mediated pathway between
two quantum Hall interface channels. Our findings suggest the potential of
using graphene as a strain sensor for developments in graphene-based device
fabrications and measurements technologies.
Understanding how metal atoms are stabilized on metal oxide supports is
important for predicting the stability of single-atom catalysts. In this study,
we use scanning tunnelling microscopy (STM) and x-ray photoelectron
spectroscopy (XPS) to investigate four catalytically active metals - Platinum,
Rhodium, Nickel and Iridium - on the anatase TiO2(101) surface. The metals were
vapor deposited at room temperature in ultrahigh vacuum (UHV) conditions, and
also with a background water pressure of 2x10-8 mbar. Pt and Ni exist as a
mixture of adatoms and nanoparticles in UHV at low coverage, with the adatoms
immobilized at defect sites. Water has no discernible effect on the Pt
dispersion, but significantly increases the amount of Ni single atoms. Ir is
highly dispersed, but sinters to nanoparticles in the water vapor background
leading to the formation of large clusters at step edges. Rh forms clusters on
the terrace of anatase TiO2(101) irrespective of the environment. We conclude
that introducing defect sites into metal oxide supports could be a strategy to
aid the dispersion of single atoms on metal-oxide surfaces, and that the
presence of water should be taken into account in the modelling of single-atom
catalysts.
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 $1/r^3$.
We propose a novel architecture that utilizes two 0-$\pi$ qubits based on
topological Josephson junctions to implement a parity-protected superconducting
qubit. The topological Josephson junctions provides protection against
fabrication variations, which ensures the identical Josephson junctions
required to implement the0-$\pi$ qubit. By viewing the even and odd parity
ground states of a 0-$\pi$ qubit as spin-$\frac{1}{2}$ states, we construct the
logic qubit states using the total parity odd subspace of two 0-$\pi$ qubits.
This parity-protected qubit exhibits robustness against charge noise, similar
to a singlet-triplet qubit's immunity to global magnetic field fluctuations.
Meanwhile, the flux noise cannot directly couple two states with the same total
parity and therefore is greatly suppressed. Benefiting from the simultaneous
protection from both charge and flux noise, we demonstrate a dramatic
enhancement of both $T_1$ and $T_2$ coherence times. Our work presents a new
approach to engineer symmetry-protected superconducting qubits.
Atomically precise graphene nanoflakes, called nanographenes, have emerged as
a promising platform to realize carbon magnetism. Their ground state spin
configuration can be anticipated by Ovchinnikov-Lieb rules based on the
mismatch of {\pi}-electrons from two sublattices. While rational geometrical
design achieves specific spin configurations, further direct control over the
{\pi}-electrons offers a desirable extension for efficient spin manipulations
and potential quantum device operations. To this end, we apply a site-specific
dehydrogenation using a scanning tunneling microscope tip to nanographenes
deposited on a Au(111) substrate, which shows the capability of precisely
tailoring the underlying {\pi}-electron system and therefore efficiently
manipulating their magnetism. Through first-principles calculations and
tight-binding mean-field-Hubbard modelling, we demonstrate that the
dehydrogenation-induced Au-C bond formation along with the resulting
hybridization between frontier {\pi}-orbitals and Au substrate states
effectively eliminate the unpaired {\pi}-electron. Our results establish an
efficient technique for controlling the magnetism of nanographenes.
Ultracold Fermi gases of spin-3/2 atoms provide a clean platform to realise
SO(5) models of 4-Fermi interactions in the laboratory. By confining the atoms
in a two-dimensional Raman lattice, we show how this system can be used as a
flexible quantum simulator of Dirac quantum field theories (QFTs) that combine
Gross-Neveu and Thirring interactions with a higher-order topological twist. We
show that the lattice model corresponds to a regularization of this QFT with an
anisotropic twisted Wilson mass. This allows us to access higher-order
topological states protected by a hidden SO(5) symmetry, a remnant of the
original rotational symmetry of the 4-Fermi interactions that is not explicitly
broken by the lattice discretization. Using large-$N$ methods, we show that the
4-Fermi interactions lead to a rich phase diagram with various competing
fermion condensates. Our work opens a route for the implementation of
correlated higher-order topological states with tunable interactions that has
interesting connections to non-trivial relativistic QFTs of Dirac fermions in
$D = 2 + 1$ dimensions.
Terahertz (THz) field pulses can now be applied in Scanning Tunnelling
Microscopy (THz-STM) junction experiments to study time resolved dynamics. The
relatively slow pulse compared to the typical electronic time-scale calls for
approximations based on a time-scale separation. Here, we contrast three
methods based on non-equilibrium Green's functions (NEGF): (i) the
steady-state, adiabatic results, (ii) the lowest order dynamic expansion in the
time-variation (DE), and (iii) the auxiliary mode (AM) propagation method
without approximations in the time-variation. We consider a concrete THz-STM
junction setup involving a hydrogen adsorbate on graphene where the localized
spin polarization can be manipulated on/off by a local field from the tip
electrode and/or a back-gate affecting the in-plane transport. We use
steady-state NEGF combined with Density Functional Theory (DFT-NEGF) to obtain
a Hubbard model for the study of the junction dynamics. Solving the Hubbard
model in a mean-field approximation, we find that the near-adiabatic first
order dynamical expansion provides a good description for STM voltage pulses up
to the 1 V range.
It is commonly believed that light cannot couple to the collective
excitations of the fractional quantum Hall effect (FQHE). This assumption
relies on Kohn's theorem that states that electron-electron interactions
decouple from homogeneous electromagnetic fields due to galilean invariance.
Here, we demonstrate that the existence of an edge breaks Kohn's theorem, and
enables coupling of cavity light to the plasmonic edge modes of the FQHE. We
derive the coupling using the FQHE bulk-boundary correspondence and predict the
formation of experimentally detectable plasmon polaritons. We find that a
single cavity mode leaves the system's topological protection intact.
Interestingly, however, a multimode cavity mediates plasmon backscattering, and
effectively transforms the edges of the 2D FQHE into a 1D wire. Such
cavity-meditated nonlocal backscattering bodes the breakdown of the topological
protection in the regime of ultra-strong photon-plasmon coupling. Our
analytical framework and photoelectric findings pave the way for investigating
the topological order of the FQHE via optical spectroscopic probes and provide
new opportunities to control FQHE edge excitations using light.
Classical molecular dynamics (MD) has been shown to be effective in
simulating heat conduction in certain molecular junctions since it inherently
takes into account some essential methodological components which are lacking
with quantum Landauer-type transport model, such as many-body full force-field
interactions, anharmonicity effects and nonlinear responses for large
temperature biases. However, the classical mechanics reaches its limit in the
environments where the quantum effects are significant (e.g. with
low-temperatures substrates, presence of extremely high frequency molecular
modes). Here, we present an atomistic simulation methodology for molecular heat
conduction that incorporates the quantum Bose-Einstein statistics into an
effective temperature in the form of modified Langevin equation. We show that
the results from such a quasi-classical effective temperature (QCET) MD method
deviates drastically when the baths temperature approaches zero from classical
MD simulations and the results converge to the classical ones when the bath
approaches the high-temperature limit, which makes the method suitable for full
temperature range. In addition, we show that our quasi-classical thermal
transport method can be used to model the conducting substrate layout and
molecular composition (e.g. anharmonicities, high-frequency modes). Anharmonic
models are explicitly simulated via the Morse potential and compared to pure
harmonic interactions, to show the effects of anharmonicities under quantum
colored bath setups. Finally, the chain length dependence of heat conduction is
examined for one-dimensional polymer chains placed in between quantum augmented
baths.
Searching for topological insulators in solids is one of the main issues of
modern condensed matter physics since robust gapless edge or surface states of
the topological insulators can be used as building blocks of next-generation
devices. Enhancing spin-orbit couplings is a promising way to realize
topological insulators in solids, whereas the amplitude of the spin-orbit
couplings is not sufficiently large in most materials. Here we show a way to
realize a topological state characterized by the quantized Zak phase, termed
the Zak insulator, with spin-polarized edges in organic antiferromagnetic Mott
insulators without relying on the spin-orbit coupling. The obtained Zak
insulator can have a large charge gap compared to the conventional topological
insulators, since Coulomb interactions mainly govern the amplitude of the
charge gap in the antiferromagnetic Mott insulators. Besides the mean-field
analysis, we demonstrate that the Zak insulator survives against electron
correlation effects by calculating the many-body Zak phase. Our finding
provides an unprecedented way to realize a topological state in strongly
correlated electron systems.
Higher-order networks can sustain topological signals which are variables
associated not only to the nodes, but also to the links, to the triangles and
in general to the higher dimensional simplices of simplicial complexes. These
topological signals can describe a large variety of real systems including
currents in the ocean, synaptic currents between neurons and biological
transportation networks. In real scenarios topological signal data might be
noisy and an important task is to process these signals by improving their
signal to noise ratio. So far topological signals are typically processed
independently of each other. For instance, node signals are processed
independently of link signals, and algorithms that can enforce a consistent
processing of topological signals across different dimensions are largely
lacking. Here we propose Dirac signal processing, an adaptive, unsupervised
signal processing algorithm that learns to jointly filter topological signals
supported on nodes, links and triangles of simplicial complexes in a consistent
way. The proposed Dirac signal processing algorithm is formulated in terms of
the discrete Dirac operator which can be interpreted as "square root" of a
higher-order Hodge Laplacian. We discuss in detail the properties of the Dirac
operator including its spectrum and the chirality of its eigenvectors and we
adopt this operator to formulate Dirac signal processing that can filter noisy
signals defined on nodes, links and triangles of simplicial complexes. We test
our algorithms on noisy synthetic data and noisy data of drifters in the ocean
and find that the algorithm can learn to efficiently reconstruct the true
signals outperforming algorithms based exclusively on the Hodge Laplacian.
The triangular lattice antiferromagnet (TLAF) has been the standard paradigm
of frustrated magnetism for several decades. The most common magnetic ordering
in insulating TLAFs is the 120 structure. However, a new triple-Q chiral
ordering can emerge in metallic TLAFs, representing the short wavelength limit
of magnetic skyrmion crystals. We report the metallic TLAF Co1/3TaS2 as the
first example of tetrahedral triple-Q ordering with the associated topological
Hall effect (non-zero {\sigma}xy(H=0)). Our measurements of the inelastic
neutron scattering cross section are also consistent with the calculated
dynamical structure factor of the tetrahedral triple-Q state.
Intrinsic topological superconducting materials are exotic and vital to
develop the next-generation topological superconducting devices, topological
quantum calculations, and quantum information technologies. Here, we predict
the topological and nodal superconductivity of MS (M = Nb and Ta)
transition-metal sulfides by using the density functional theory for
superconductors combining with the symmetry indicators. We reveal their
higher-order topology nature with an index of Z4 = 2. These materials have a
higher Tc than the Nb or Ta metal superconductors due to their flat-band and
strong electron-phonon coupling nature. Electron doping and lighter isotopes
can effectively enhance the Tc. Our findings show that the MS (M = Nb and Ta)
systems can be new platforms to study exotic physics in the higher-order
topological superconductors, and provide a theoretical support to utilize them
as the topological superconducting devices in the field of advanced topological
quantum calculations and information technologies.
In this work, we report on the growth of hexagonal boron nitride (hBN)
crystals from an iron flux at atmospheric pressure and high temperature and
demonstrate that (i) the entire sheet of hBN crystals can be detached from the
metal in a single step using hydrochloric acid and that (ii) these hBN crystals
allow the fabrication of high carrier mobility graphene devices. By combining
spatially-resolved confocal Raman spectroscopy and electrical transport
measurements, we confirm the excellent quality of these crystals for
high-performance hBN-graphene-based van der Waals heterostructures. The full
width at half maximum of the graphene Raman 2D peak is as low as 16 cm$^{-1}$,
and the room temperature charge carrier mobilitiy is around 80000 cm$^2$/(Vs)
at a carrier density 1$\times$10$^{12}$cm$^{-12}$. This is fully comparable
with devices of similar dimensions fabricated using crystalline hBN synthesized
by the high pressure and high temperature method. Finally, we show that for
exfoliated high-quality hBN flakes with a thickness between 20 nm and 40 nm the
line width of the hBN Raman peak, in contrast to the graphene 2D line width, is
not useful for benchmarking hBN in high mobility graphene devices.
We propose an unconventional bulk-edge correspondence for two-dimensional
Stiefel-Whitney insulators and Euler insulators, which are topological
insulators protected by the $PT$ symmetry. We find that, although the energy
spectrum under the open boundary condition is generally gapped, the
entanglement spectrum is gapless when the Stiefel-Whitney or Euler class is
nonzero. The robustness of the gapless spectrum for Stiefel-Whitney insulator
can be understood through an emergent anti-unitary particle-hole symmetry. For
the Euler insulators, we propose a conjecture, which is supported by our
numerical calculation, that the Euler class is equal to the number of crossing
in the entanglement spectrum, taking into account the degree of the crossings.
We also discuss that these crossings of the entanglement spectrum are related
to the gap closing points in the cutting procedure, which is the energy
spectrum as the magnitude of the boundary hopping is varied.
We demonstrate via exact diagonalization that AA-stacked TMD homobilayers
host fractional quantum anomalous Hall (FQAH) states with fractionally
quantized Hall conductance at fractional fillings $n=\frac{1}{3},\,
\frac{2}{3}$ and zero magnetic field. While both states are most robust at
angles near $\theta\approx 2^{\circ}$, the $n=\frac{1}{3}$ state gives way to a
charge density wave with increasing twist angle whereas the $n=\frac{2}{3}$
state survives across a much broader range of twist angles. We show that the
competition between FQAH states and charge density wave or metallic phases is
primarily controlled by the wavefunctions and dispersion of the underlying
Chern band, respectively. Additionally, Ising ferromagnetism is found across a
broad range of fillings where the system is insulating or metallic alike. The
spin gap is enhanced at filling fractions where integer and fractional quantum
anomalous Hall states are formed.
Multiferroic tunnel junctions (MFTJs) based on two-dimensional (2D) van der
Waals heterostructures with sharp and clean interfaces at the atomic scale are
crucial for applications in nanoscale multi-resistive logic memory devices. The
recently discovered sliding ferroelectricity in 2D van der Waals materials has
opened new avenues for ferroelectric-based devices. Here, we theoretically
investigate the spin-dependent electronic transport properties of
Fe$_3$GeTe$_2$/graphene/bilayer-$h$-BN/graphene/CrI$_3$ (FGT/Gr-BBN-Gr/CrI)
all-vdW MFTJs by employing the nonequilibrium Green's function combined with
density functional theory. We demonstrate that such FGT/Gr-BBN-Gr/CrI MFTJs
exhibit four non-volatile resistance states associated with different staking
orders of sliding ferroelectric BBN and magnetization alignment of
ferromagnetic free layer CrI$_3$, with a maximum tunnel magnetoresistance
(electroresistance) ratio, i.e., TMR (TER) up to $\sim$$3.36\times10^{4}$\%
($\sim$$6.68\times10^{3}$\%) at a specific bias voltage. Furthermore, the
perfect spin filtering and remarkable negative differential resistance effects
are evident in our MFTJs. We further discover that the TMR, TER, and spin
polarization ratio under an equilibrium state can be enhanced by the
application of in-plane biaxial strain. This work shows that the giant
tunneling resistance ratio, multiple resistance states, and excellent
spin-polarized transport properties of sliding ferroelectric BBN-based MFTJs
indicate its significant potential in nonvolatile memories.
Quantum spin liquids and anyons, used to be subjects of condensed matter
physics, now are realized in various platforms of qubits, offering
unprecedented opportunities to investigate fundamental physics of many-body
quantum entangled states. Qubits are inevitably exposed to environment effects
such as decoherence and dissipation, which are believed to be detrimental to
many-body entanglement. Here, we argue that unlike the common belief
decoherence and dissipation can give rise to novel topological phenomena in
quantum spin liquids. We study open quantum systems of the Kitaev spin liquid
and the toric code via the Lindblad master equation approach. By using exact
solutions and numerical approaches, we show the dynamical occurrence of anyon
condensation by decoherence and dissipation, which results in a topological
transition from the initial state spin liquid to the steady state spin liquid.
The mechanism of the anyon condensation transition by the Lindblad dynamics is
elucidated. We also provide an insight into the relationship between the Kitaev
spin liquid and the toric code in the picture of anyon condensation. Our work
suggests open quantum systems to be a new venue for topological phenomena of
quantum spin liquids and anyons.
An underestimation of the fundamental band gap values by the density
functional theory within the local density approximation and associated
approaches is a well-known challenge of ab-initio electronic structure
computations. Motivated by recent optical experiments [D. Santos-Cottin et al.,
arXiv:2301.08014], we have revisited first-principle results obtained earlier
for EuCd2As2 and extended the computational studies to the whole class of
systems EuCd2X2 (X = P, As, Sb, Bi), to EuIn2X2 (X = P, As, Sb), and to
nonmagnetic AEIn2As2 (AE= Ca, Sr, Ba) employing a hybrid functional method. We
find that our approach provides the magnitude of the energy gap for EuCd2As2 in
agreement with the experimental value. Actually, our results indicate that
EuSn2As2, BaIn2As2, EuCd2Bi2 and EuCd2SbBi are robust topological insulators,
while all other compounds are topologically trivial semiconductors. The trivial
band gaps of EuCd2P2, EuCd2As2 and EuCd2Sb2 are in the range of 1.38-1.48 eV,
0.72-0.79 eV and 0.46-0.49 eV, respectively. The topologically trivial Eu-based
systems are antiferromagnetic semiconductors with a strong red shift of the
energy gap in a magnetic field caused by the exchange coupling of the band
states to spins localized on the 4f-shell of Eu ions. Additionally, the EuIn2X2
(X = P, As) compounds show altermagnetic exchange-induced band spin-splitting,
particularly noticeable in the case of states derived from 5d-Eu orbitals.
FeTe$_{0.55}$Se$_{0.45}$(FTS) occupies a special spot in modern condensed
matter physics at the intersections of electron correlation, topology, and
unconventional superconductivity. The bulk electronic structure of FTS is
predicted to be topologically nontrivial thanks to the band inversion between
the $d_{xz}$ and $p_z$ bands along $\Gamma$-$Z$. However, there remain debates
in both the authenticity of the Dirac surface states (DSS) and the experimental
deviations of band structure from the theoretical band inversion picture. Here
we resolve these debates through a comprehensive ARPES investigation. We first
observe a persistent DSS independent of $k_z$. Then, by comparing FTS with FeSe
which has no band inversion along $\Gamma$-$Z$, we identify the spectral weight
fingerprint of both the presence of the $p_z$ band and the inversion between
the $d_{xz}$ and $p_z$ bands. Furthermore, we propose a reconciling band
structure under the framework of a tight-binding model preserving crystal
symmetry. Our results highlight the significant influence of correlation on
modifying the band structure and make a strong case for the existence of
topological band structure in this unconventional superconductor.
The recent claim of superconductivity above room temperature in
Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O with 0.9 < $x$ < 1 (referred to as LK-99) has
sparked considerable interest. To minimize the influence of structural defects
and impurity phases on the physical properties, we have synthesized phase-pure
single crystals with $x \sim 1$. We find that the crystals are highly
insulating and optically transparent. X-ray analysis reveals an uneven
distribution of the substituted Cu throughout the sample. Temperature ($T$)
dependent magnetization measurements for $ 2 \leq T \leq 800$ K reveal the
diamagnetic response characteristic of a non-magnetic insulator, as well as a
small ferromagnetic component, possibly originating from frustrated exchange
interactions in Cu-rich clusters in the Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O
structure. No anomalies indicative of phase transitions are observed. We
therefore rule out the presence of superconductivity in Pb$_{9}$Cu(PO$_4$)$_6$O
crystals, and provide some considerations on the origin of anomalies previously
reported in experiments on polycrystalline specimen.

Date of feed: Thu, 24 Aug 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) **Anomalies of Non-Invertible Symmetries in (3+1)d. (arXiv:2308.11706v1 [hep-th])**

Clay Cordova, Po-Shen Hsin, Carolyn Zhang

**Coulomb drag in metallic twisted bilayer graphene. (arXiv:2308.11739v1 [cond-mat.mes-hall])**

Federico Escudero, Juan Sebastián Ardenghi

**Dynamics of K$_2$Ni$_2$(SO$_4$)$_3$ governed by proximity to a 3D spin liquid model. (arXiv:2308.11746v1 [cond-mat.str-el])**

M. G. Gonzalez, V. Noculak, A. Sharma, V. Favre, J-R. Soh, A. Magrez, R. Bewley, H. O. Jeschke, J. Reuther, H. M. Rønnow, Y. Iqbal, I. Živković

**Symmetry breaking induced insulating electronic state in Pb$_{9}$Cu(PO$_4$)$_6$O. (arXiv:2308.11766v1 [cond-mat.mtrl-sci])**

Jiaxi Liu, Tianye Yu, Jiangxu Li, Jiantao Wang, Junwen Lai, Yan Sun, Xing-Qiu Chen, Peitao Liu

**Ferromagnetic and insulating behavior in both half magnetic levitation and non-levitation LK-99 like samples. (arXiv:2308.11768v1 [cond-mat.supr-con])**

Pinyuan Wang, Xiaoqi Liu, Jun Ge, Chengcheng Ji, Haoran Ji, Yanzhao Liu, Yiwen Ai, Gaoxing Ma, Shichao Qi, Jian Wang

**Magnetic Skyrmion: From Fundamental Physics to Pioneering Applications. (arXiv:2308.11811v1 [cond-mat.mes-hall])**

Kishan K. Mishra, Aijaz H. Lone, Srikant Srinivasan, Hossein Fariborzi, Gianluca Setti

**MBD+C: how to incorporate metallic character into atom-based dispersion energy schemes. (arXiv:2308.11855v1 [cond-mat.mes-hall])**

John F. Dobson, Alberto Ambroselli

**Native Pb vacancy defects induced p-type characteristic in epitaxial monolayer PbSe. (arXiv:2308.11931v1 [cond-mat.mtrl-sci])**

Qiwei Tian, Ping Li, Li Zhang, Yuan Tian, Long-Jing Yin, Lijie Zhang, Zhihui Qin

**Detecting Strain Effects due to Nanobubbles in Graphene Mach-Zehnder Interferometers. (arXiv:2308.11954v1 [cond-mat.mes-hall])**

Nojoon Myoung, Taegeun Song, Hee Chul Park

**A study of Pt, Rh, Ni and Ir dispersion on anatase TiO2(101) and the role of water. (arXiv:2308.11973v1 [cond-mat.mtrl-sci])**

Lena Puntscher, Kevin Daninger, Michael Schmid, Ulrike Diebold, Gareth S. Parkinson

**Irreducible momentum-space spin structure of Weyl semimetals and its signatures in Friedel oscillations. (arXiv:2308.11986v1 [cond-mat.mes-hall])**

Andy Knoll, Carsten Timm

**Parity-protected superconducting qubit based on topological insulators. (arXiv:2308.12027v1 [cond-mat.mes-hall])**

Guo-Liang Guo, Han-Bing Leng, Xin Liu

**Tailoring magnetism of nanographenes via tip-controlled dehydrogenation. (arXiv:2308.12036v1 [cond-mat.mtrl-sci])**

Chenxiao Zhao, Qiang Huang, Leoš Valenta, Kristjan Eimre, Lin Yang, Aliaksandr V. Yakutovich, Wangwei Xu, Ji Ma, Xinliang Feng, Michal Jurí{č}ek, Roman Fasel, Pascal Ruffieux, Carlo A. Pignedoli

**A higher-order topological twist on cold-atom SO(5) Dirac fields. (arXiv:2308.12051v1 [cond-mat.quant-gas])**

A. Bermudez, D. González-Cuadra, S. Hands

**Manipulation of magnetization and spin transport in hydrogenated graphene with THz pulses. (arXiv:2308.12076v1 [cond-mat.mes-hall])**

Jakob Kjærulff Svaneborg, Aleksander Bach Lorentzen, Fei Gao, Antti-Pekka Jauho, Mads Brandbyge

**Fractional quantum Hall edge polaritons. (arXiv:2308.12146v1 [cond-mat.mes-hall])**

Lucas Winter, Oded Zilberberg

**Quantum bath augmented stochastic nonequilibrium atomistic simulations for molecular heat conduction. (arXiv:2308.12282v1 [cond-mat.mtrl-sci])**

Renai Chen, Mohammadhasan Dinpajooh, Abraham Nitzan

**Correlated Zak insulator in organic antiferromagnets. (arXiv:2301.04490v2 [cond-mat.str-el] UPDATED)**

Takahiro Misawa, Makoto Naka

**Dirac signal processing of higher-order topological signals. (arXiv:2301.10137v2 [eess.SP] UPDATED)**

Lucille Calmon, Michael T. Schaub, Ginestra Bianconi

**Tetrahedral triple-Q magnetic ordering and large spontaneous Hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2. (arXiv:2303.03760v4 [cond-mat.str-el] UPDATED)**

Pyeongjae Park, Woonghee Cho, Chaebin Kim, Yeochan An, Yoon-Gu Kang, Maxim Avdeev, Romain Sibille, Kazuki Iida, Ryoichi Kajimoto, Ki Hoon Lee, Woori Ju, En-Jin Cho, Han-Jin Noh, Myung Joon Han, Shang-Shun Zhang, Cristian D. Batista, Je-Geun Park

**Higher-order topological and nodal superconducting transition-metal sulfides MS (M = Nb and Ta). (arXiv:2304.03062v3 [cond-mat.supr-con] UPDATED)**

Yipeng An, Juncai Chen, Yong Yan, Jinfeng Wang, Yinong Zhou, Zhengxuan Wang, Chunlan Ma, Tianxing Wang, Ruqian Wu, Wuming Liu

**Chemically detaching hBN crystals grown at atmospheric pressure and high temperature for high-performance graphene devices. (arXiv:2304.03149v2 [cond-mat.mes-hall] UPDATED)**

Taoufiq Ouaj, Leonard Kramme, Marvin Metzelaars, Jiahan Li, Kenji Watanabe, Takashi Taniguchi, James H. Edgar, Bernd Beschoten, Paul Kögerler, Christoph Stampfer

**Bulk-edge correspondence of Stiefel-Whitney and Euler insulators through the entanglement spectrum and cutting procedure. (arXiv:2304.06974v2 [cond-mat.mes-hall] UPDATED)**

Ryo Takahashi, Tomoki Ozawa

**Fractional quantum anomalous Hall states in twisted bilayer MoTe$_2$ and WSe$_2$. (arXiv:2304.12261v3 [cond-mat.mes-hall] UPDATED)**

Aidan P. Reddy, Faisal F. Alsallom, Yang Zhang, Trithep Devakul, Liang Fu

**Voltage-tunable giant nonvolatile multiple-state resistance in sliding-interlayer ferroelectric h-BN van der Waals multiferroic tunnel junction. (arXiv:2305.06126v2 [cond-mat.mes-hall] UPDATED)**

Xinlong Dong, Xuemin Shen, Xiaowen Sun, Yuhao Bai, Zhi Yan, Xiaohong Xu

**Mixed-State Quantum Spin Liquids and Dynamical Anyon Condensations in Kitaev Lindbladians. (arXiv:2305.09197v3 [cond-mat.str-el] UPDATED)**

Kyusung Hwang

**Ab-initio overestimation of the topological region in Eu-based compounds. (arXiv:2305.10804v2 [cond-mat.str-el] UPDATED)**

Giuseppe Cuono, Raghottam M. Sattigeri, Carmine Autieri, Tomasz Dietl

**Spectroscopic evidence for topological band structure in FeTe$_{0.55}$Se$_{0.45}$. (arXiv:2307.03861v2 [cond-mat.str-el] UPDATED)**

Y.-F. Li, S.-D. Chen, M. Garcia-Diez, M. I. Iraola, H. Pfau, Y.-L. Zhu, Z.-Q. Mao, T. Chen, M. Yi, P.-C. Dai, J.A. Sobota, M. Hashimoto, M. G. Vergniory, D.-H. Lu, Z.-X. Shen

**Single crystal synthesis, structure, and magnetism of Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O. (arXiv:2308.06256v2 [cond-mat.supr-con] UPDATED)**

P. Puphal, M. Y. P. Akbar, M. Hepting, E. Goering, M. Isobe, A. A. Nugroho, B. Keimer

Found 3 papers in prb The Josephson diode effect (JDE) is the asymmetry of the critical supercurrent flowing along opposite current directions. We study a mechanism in this work to generate a possible JDE in the two-dimensional line-centered honeycomb (LCH) lattice based Josephson junction in which the supercurrent flows… Orbitronics has recently emerged as a very active research topic after several proposals aiming to exploit the orbital degree of freedom for charge-free electronics. In this communication, we investigate orbital transport in selected two-dimensional systems to better understand which parameters gove… Graphene quantum dots (GQDs) can exhibit a range of spectacular phenomena such as the Klein tunneling induced quasibound states and Berry phase tuned energy spectra. According to previous studies, all these interesting quantum phenomena seem to be well understood in the free electron picture. Howeve…

Date of feed: Thu, 24 Aug 2023 03:16:58 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) **Josephson diode effect in a line-centered honeycomb lattice based superconductor junction**

Ya-Jun Wei, Juan-Juan Wang, and J. Wang

Author(s): Ya-Jun Wei, Juan-Juan Wang, and J. Wang

[Phys. Rev. B 108, 054521] Published Wed Aug 23, 2023

**Orbital Hall physics in two-dimensional Dirac materials**

Armando Pezo, Diego García Ovalle, and Aurélien Manchon

Author(s): Armando Pezo, Diego García Ovalle, and Aurélien Manchon

[Phys. Rev. B 108, 075427] Published Wed Aug 23, 2023

**Electron-electron interaction and correlation-induced two density waves with different Fermi velocities in graphene quantum dots**

Hui-Ying Ren, Ya-Ning Ren, Qi Zheng, Jia-Qi He, and Lin He

Author(s): Hui-Ying Ren, Ya-Ning Ren, Qi Zheng, Jia-Qi He, and Lin He

[Phys. Rev. B 108, L081408] Published Wed Aug 23, 2023

Found 1 papers in prl The nuclear incompressibility is a key parameter of the nuclear equation of state that can be extracted from the measurements of the so-called “breathing mode” of finite nuclei. The most serious discrepancy so far is between values extracted from Pb and Sn, that has provoked the longstanding questio…

Date of feed: Thu, 24 Aug 2023 03:16:59 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) **Toward a Unified Description of Isoscalar Giant Monopole Resonances in a Self-Consistent Quasiparticle-Vibration Coupling Approach**

Z. Z. Li (李征征), Y. F. Niu (牛一斐), and G. Colò

Author(s): Z. Z. Li (李征征), Y. F. Niu (牛一斐), and G. Colò

[Phys. Rev. Lett. 131, 082501] Published Wed Aug 23, 2023

Found 7 papers in nano-lett

Date of feed: Wed, 23 Aug 2023 13:05:16 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] 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 6 papers in acs-nano

Date of feed: Wed, 23 Aug 2023 13:02:49 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] 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