Found 23 papers in cond-mat CeAlSi has been recently identified as a Weyl semimetal with simultaneous
breaking of inversion and time-reversal symmetries. Among many potential
distinguishing features that this may offer, we focus on the nonlinear optical
properties. We present a thorough examination of the injection current,
associated with circular photogalvanic effect, from a first-principles
approach. Our study demonstrates a significant injection current, exceeding
previously reported results in literature. Interestingly, dominant contribution
comes in the near-infrared region of the electromagnetic spectrum. In addition,
we explored several externally adjustable parameters that may have a positive
impact on the circular photocurrent. We uncover a substantial boost in the
photocurrent through the application of uniaxial strain along c-axis of the
crystal $-$ a 5% strain results in a remarkable 62% increment. This provides
insight into the exceptional optoelectronic characteristics of CeAlSi and opens
up potential avenues for novel photogalvanic applications.
Al$_{0.68}$Sc$_{0.32}$N (AlScN) has gained attention for its outstanding
ferroelectric properties, including a high coercive field and high remnant
polarization. Although AlScN-based ferroelectric field-effect transistors
(FETs) for memory applications have been demonstrated, a device for logic
applications with minimal hysteresis has not been reported. This study reports
on the transport characteristics of a MoS$_{2}$ negative capacitance FET
(NCFET) based on an AlScN ferroelectric material. We experimentally demonstrate
the effect of a dielectric layer in the gate stack on the memory window and
subthreshold swing (SS) of the NCFET. We show that the hysteresis behavior of
transfer characteristics in the NCFET can be minimized with the inclusion of a
non-ferroelectric dielectric layer, which fulfills the capacitance-matching
condition. Remarkably, we also observe the NC effect in MoS$_{2}$/AlScN NCFETs
arrays based on large-area monolayer MoS$_{2}$ synthesized by chemical vapor
deposition, showing the SS values smaller than its thermionic limit (~36-60
mV/dec) and minimal variation in threshold voltages (< 20 mV).
We study the topological phase transitions occurring in three-dimensional
(3D) multicomponent lattice Abelian-Higgs (LAH) models, in which an
$N$-component scalar field is minimally coupled with a noncompact Abelian gauge
field, with a global SU($N$) symmetry. Their phase diagram presents a
high-temperature Coulomb (C) phase, and two low-temperature molecular (M) and
Higgs (H) phases, both characterized by the spontaneous breaking of the SU($N$)
symmetry. The molecular-Higgs (MH) and Coulomb-Higgs (CH) transitions are
topological transitions, separating a phase with gapless gauge modes and
confined charges from a phase with gapped gauge modes and deconfined charged
excitations. These transitions are not described by effective
Landau-Ginzburg-Wilson theories, due to the active role of the gauge modes. We
show that the MH and CH transitions belong to different charged universality
classes. The CH transitions are associated with the $N$-dependent charged fixed
point of the renormalization-group (RG) flow of the 3D Abelian-Higgs field
theory (AHFT). On the other hand, the universality class of the MH transitions
is independent of $N$ and coincides with that controlling the continuous
transitions of the one-component ($N=1$) LAH model. In particular, we verify
that the gauge critical behavior always corresponds to that observed in the 3D
inverted XY model, and that the correlations of an extended charged
gauge-invariant operator (in the Lorenz gauge, this operator corresponds to the
scalar field, thus it is local, justifing the use of the RG framework) have an
$N$-independent critical universal behavior. This scenario is supported by
numerical results for $N=1,\,2,\,25$. The MH critical behavior does not
apparently have an interpretation in terms of the RG flow of the AHFT, as
determined perturbatively close to four dimensions or with standard large-$N$
methods.
In the present paper, we investigate the structural, thermodynamic, dynamic,
elastic, and electronic properties of doped 2D diamond C$_4$X$_2$ (X = B or N)
nanosheets in both AA$'$A$''$ and ABC stacking configurations, by
first-principles calculations. Those systems are composed of 3 diamond-like
graphene sheets, with an undoped graphene layer between two 50% doped ones. Our
results, based on the analysis of ab-initio molecular dynamics simulations,
phonon dispersion spectra, and Born's criteria for mechanical stability,
revealed that all four structures are stable. Additionally, their standard
enthalpy of formation values are similar to the one of pristine 2D diamond,
recently synthesized by compressing three graphene layers. The C$_4$X$_2$ (X =
B or N) systems exhibit high elastic constant values and stiffness comparable
to the diamond. The C$_4$N$_2$ nanosheets present wide indirect band gaps that
could be advantageous for applications similar to the ones of the hexagonal
boron nitride (h-BN), such as a substrate for high-mobility 2D devices. On the
other hand, the C$_4$B$_2$ systems are semiconductors with direct band gaps, in
the 1.6 - 2.0 eV range, and small effective masses, which are characteristics
that may be favorable to high carrier mobility and optoelectronics
applications.
Haah's cubic code is the prototypical type-II fracton topological order. It
instantiates the no string-like operator property that underlies the favorable
scaling of its code distance and logical energy barrier. Previously, the cubic
code was only explored in translation-invariant systems on infinite and
periodic lattices. In these settings, the code distance scales superlinearly
with the linear system size, while the number of logical qubits within the
degenerate ground space exhibits a complicated functional dependence that
undergoes large fluctuations within a linear envelope. Here, we extend the
cubic code to systems with open boundary conditions and crystal lattice
defects. We characterize the condensation of topological excitations in the
vicinity of these boundaries and defects, finding that their inclusion can
introduce local string-like operators and enhance the mobility of otherwise
fractonic excitations. Despite this, we use these boundaries and defects to
define new encodings where the number of logical qubits scales linearly without
fluctuations, and the code distance scales superlinearly, with the linear
system size. These include a subsystem encoding with open boundary conditions
and a subspace encoding using lattice defects.
Ultra-low temperature scanning tunnelling microscopy and spectroscopy
(STM/STS) achieved by dilution refrigeration can provide unrivalled insight
into the local electronic structure of quantum materials and atomic-scale
quantum systems. Effective isolation from mechanical vibration and acoustic
noise is critical in order to achieve ultimate spatial and energy resolution.
Here, we report on the design and performance of an ultra-low vibration (ULV)
laboratory hosting a customized but otherwise commercially available 40mK STM.
The design of the vibration isolation consists of a T-shaped concrete mass
block (55t), suspended by actively controlled pneumatic springs, and placed on
a foundation separated from the surrounding building in a "room-within-a-room"
design. Vibration levels achieved are meeting the VC-M vibration standard at >3
Hz, reached only in a limited number of laboratories worldwide. Measurement of
the STM's junction noise confirms effective vibration isolation on par with
custom built STMs in ULV laboratories. In this tailored low-vibration
environment, the STM achieves an energy resolution of 43ueV (144 mK), promising
for the investigation and control of quantum matter at atomic length scales.
Colonies of the social bacterium Myxococcus xanthus go through a
morphological transition from a thin colony of cells to three-dimensional
droplet-like fruiting bodies as a strategy to survive starvation. The
biological pathways that control the decision to form a fruiting body have been
studied extensively. However, the mechanical events that trigger the creation
of multiple cell layers and give rise to droplet formation remain poorly
understood. By measuring cell orientation, velocity, polarity, and force with
cell-scale resolution, we reveal a stochastic local polar order in addition to
the more obvious nematic order. Average cell velocity and active force at
topological defects agree with predictions from active nematic theory, but
their fluctuations are anomalously large due to polar active forces generated
by the self-propelled rod-shaped cells. We find that M. xanthus cells adjust
their reversal frequency to tune the magnitude of this local polar order, which
in turn controls the mechanical stresses and triggers layer formation in the
colonies.
Accurate on-chip temperature sensing is critical for the optimal performance
of modern CMOS integrated circuits (ICs), to understand and monitor localized
heating around the chip during operation. The development of quantum computers
has stimulated much interest in ICs operating a deep cryogenic temperatures
(typically 0.01 - 4 K), in which the reduced thermal conductivity of silicon
and silicon oxide, and the limited cooling power budgets make local on-chip
temperature sensing even more important. Here, we report four different methods
for on-chip temperature measurements native to complementary
metal-oxide-semiconductor (CMOS) industrial fabrication processes. These
include secondary and primary thermometry methods and cover conventional
thermometry structures used at room temperature as well as methods exploiting
phenomena which emerge at cryogenic temperatures, such as superconductivity and
Coulomb blockade. We benchmark the sensitivity of the methods as a function of
temperature and use them to measure local excess temperature produced by
on-chip heating elements. Our results demonstrate thermometry methods that may
be readily integrated in CMOS chips with operation from the milliKelivin range
to room temperature.
Field-emission resonances (FERs) for two-dimensional Pb(111) islands grown on
\mbox{Si(111)7$\times$7} surfaces were studied by low-temperature scanning
tunneling microscopy and spectroscopy (STM/STS) in a broad range of tunneling
conditions with both active and disabled feedback loop. These FERs exist at
quantized sample-to-tip distances $Z^{\,}_n$ above the sample surface, where
$n$ is the serial number of the FER state. By recording the trajectory of the
STM tip during ramping of the bias voltage $U$ (while keeping the tunneling
current $I$ fixed), we obtain the set of the $Z^{\,}_n$ values corresponding to
local maxima in the derived $dZ/dU(U)$ spectra. This way, the continuous
evolution of $Z^{\,}_n$ as a function of $U$ for all FERs was investigated by
STS experiments with active feedback loop for different $I$. Complementing
these measurements by current-distance spectroscopy at a fixed $U$, we could
construct a 4-dimensional $I-U-Z-dZ/dU$ diagram, that allows us to investigate
the geometric localization of the FERs above the surface. We demonstrate that
(i) the difference $\delta Z^{\,}_n=Z^{\,}_{n+1}-Z^{\,}_n$ between neighboring
FER lines in the $Z-U$ diagram is independent of $n$ for higher resonances,
(ii) the $\delta Z^{\,}_{n}$ value decreases as $U$ increases; (iii) the
quantized FER states lead to the \emph{periodic} variations of $\ln I$ as a
function of $Z$ with periodicity $\delta Z$; (iv) the periodic variations in
the $\ln I - Z$ spectra allows to estimate the absolute height of the tip above
the sample surface. Our findings contribute to a deeper understanding on how
the FER states affect various types of tunneling spectroscopy experiments and
how they lead to a non-exponential decay of the tunneling current as a function
of $Z$ at high bias voltages in the regime of quantized electron emission.
The hydrostatic pressure induced changes in the transport properties of
monolayer (ML) MoS$_2$ have been investigated using first-principles density
functional theory based calculations. The application of pressure induces shift
in the conduction band minimum (CBM) from K to $\Lambda$, while retaining the
band extrema at K in around the same energy at a pressure of 10 GPa. This
increase in valley degeneracy is found to have a significant impact on the
electronic transport properties of ML-MoS$_2$ via enhancement of the
thermopower (S) by up to 140\% and power factor (S$^{2}$$\sigma$/$\tau$) by up
to 310\% at 300 K. Besides, the very low deformation potential (E$_\text{DP}$)
associated with the CB-$\Lambda$ valley results in a remarkably high electronic
mobility ($\mu$) and relaxation time ($\tau$). Additionally, the application of
pressure reduces the room temperature lattice thermal conductivity
($\kappa_\text{L}$) by 20\% of its unstrained value, owing to the increased
anharmonicity and resulting increase in the intrinsic phonon scattering rates.
The hydrostatic pressure induced increase in power factor (S$^{2}$$\sigma$) and
the decrease in $\kappa_\text{L}$ act in unison to result in a substantial
improvement in the overall thermoelectric performance (zT) of ML-MoS$_2$. At
900 K with an external pressure of 25 GPa, zT values of 1.63 and 1.21 are
obtained for electron and hole doping, respectively, which are significantly
higher compared to the zT values at zero pressure. For the implementation in a
thermoelectric module where both n-type and p-type legs should be preferably
made of the same material, the concomitant increase in zT of ML-MoS$_2$ for
both types of doping with hydrostatic pressure can be highly beneficial.
Magnetic skyrmions are topological spin textures which are envisioned as
nanometre scale information carriers in magnetic memory and logic devices. The
recent demonstration of room temperature stabilization of skyrmions and their
current induced manipulation in industry compatible ultrathin films were first
steps towards the realisation of such devices. However, important challenges
remain regarding the electrical detection and the low-power nucleation of
skyrmions, which are required for the read and write operations. Here, we
demonstrate, using operando magnetic microscopy experiments, the electrical
detection of a single magnetic skyrmion in a magnetic tunnel junction (MTJ) and
its nucleation and annihilation by gate voltage via voltage control of magnetic
anisotropy. The nucleated skyrmion can be further manipulated by both gate
voltage and external magnetic field, leading to tunable intermediate resistance
states. Our results unambiguously demonstrate the readout and voltage
controlled write operations in a single MTJ device, which is a major milestone
for low power skyrmion based technologies.
Optical spectroscopy of quantum materials at ultralow temperatures is rarely
explored, yet it may provide critical characterizations of quantum phases not
possible using other approaches. We describe the development of a novel
experimental platform that enables optical spectroscopic studies, together with
standard electronic transport, of materials at millikelvin temperatures inside
a dilution refrigerator. The instrument is capable of measuring both bulk
crystals and micron-sized two-dimensional van der Waals materials and devices.
We demonstrate the performance by implementing photocurrent-based Fourier
transform infrared spectroscopy on a monolayer WTe$_2$ device and a multilayer
1T-TaS$_2$ crystal, with a spectral range available from near-infrared to
terahertz range and in magnetic fields up to 5 T. In the far-infrared regime,
we achieve spectroscopic measurements at a base temperature as low as ~ 43 mK
and a sample electron temperature of ~ 450 mK. Possible experiments and
potential future upgrades of this versatile instrumental platform are
envisioned.
A recent paper [Lee {\em et al.}, J. Korean Cryt. Growth Cryst. Techn. {\bf
33}, 61 (2023)] provides some experimental indications that
Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O with $x\approx 1$, coined LK-99, might be a
room-temperature superconductor at ambient pressure. Our density-functional
theory calculations show lattice parameters and a volume contraction with $x$
-- very similar to experiment. The DFT electronic structure shows Cu$^{2+}$ in
a $3d^9$ configuration with two extremely flat Cu bands crossing the Fermi
energy. This puts Pb$_{9}$Cu(PO$_4$)$_6$O in an ultra-correlated regime and
suggests that, without doping, it is a Mott or charge transfer insulator. If
doped such an electronic structure might support flat-band superconductivity or
an correlation-enhanced electron-phonon mechanism, whereas a diamagnet without
superconductivity appears to be rather at odds with our results.
We present a comprehensive study on the structure and optical properties of
Mn-and Co-doped ZnO samples prepared via solid-state reaction method with
different dopant concentrations and atmospheres. The samples were structural
and chemically characterized via X-ray diffraction, scanning electron
microscopy, energy-dispersive X-ray spectroscopy, and X-ray excited
photoelectron spectroscopy. The optical characterization was performed via
Raman, photoluminescence, and diffuse photoreflectance spectroscopies. Emphasis
was done on the studies of their vibrational properties. The structural data
confirm the incorporation of Mn and Co ions into the wurtzite ZnO lattice. It
is demonstrated that the usual observed additional bands in the Raman spectrum
of transitional metal (TM) doped ZnO are related to structural damage, deriving
from the doping process, and surface effects. The promoted surface optical
phonons (SOP) are of Fr\"ohlich character and, together with the longitudinal
optical (LO) polar phonons, are directly dependent on the ZnO electronic
structure. The enhancement of SOP and LO modes with TM-doping is explained in
terms of nonhomogeneous doping, with the dopants concentrating mainly on the
surface of grains, and a resonance effect due to the decrease of the ZnO
bandgap promoted by the introduction of the 3d TM levels within the ZnO
bandgap. We also discuss the origin of the controversial vibrational mode
commonly observed in the Mn-doped ZnO system. It is stated that the observation
of the analyzed vibrational properties is a signature of substitutional doping
of the ZnO structure with tuning of ZnO optical absorption into the visible
range of the electromagnetic spectrum.
First principles density functional theory based calculations have been
performed to investigate the strain and temperature induced tunability of the
thermoelectric properties of monolayer (ML) MoS$_2$. Modifications in the
electronic and phononic transport properties, under two anisotropic uniaxial
strains along the armchair (AC) and zigzag (ZZ) directions, have been explored
in detail. Considering the intrinsic carrier-phonon scattering, we found that
the charge carrier mobility ($\mu$) and relaxation time ($\tau$) increase
remarkably for strains along the ZZ direction. Concomitantly, strain along the
ZZ direction significantly reduces the lattice thermal conductivity
($\kappa_\text{L}$) of ML-MoS$_2$. The combined effect of shortened phonon
relaxation time and group velocity, and the reduced Debye temperature is found
to be the driving force behind the lowering of $\kappa_\text{L}$. The large
reduction in $\kappa_\text{L}$ and increase in $\tau$, associated with the
strains along the ZZ direction, act in unison to result in enhanced efficiency
and hence, improved thermoelectric performance. Nearly $150\%$ enhancement in
the thermoelectric efficiency can be achieved with the optimal doping
concentration. We, therefore, highlight the significance of in-plane tensile
strains, in general, and strains along the ZZ direction, in particular, in
improving the thermoelectric performance of ML-MoS$_2$.
Electrons in metals form a Fermi surface separating occupied from unoccupied
states in momentum space at zero temperature. Interactions between electrons
are usually accounted for by the Landau theory of Fermi liquids; however,
little is known about the stability of the Fermi liquid when the Fermi level
intercepts the crossing point between two bands, shrinking the Fermi surface to
a set of points known as conical intersections. Here we consider the
possibility of pairing electronic states across conical intersections that
results in a Bardeen-Cooper-Schrieffer-like state restricted to a finite range
of energies around the crossing point, hence, "floating" over an ordinary Fermi
sea of occupied states in the lower band. Although this state is not
superconducting in the usual sense and does not exhibit a gap in its excitation
spectrum, it is nevertheless immune to elastic scattering caused by any kind of
disorder, and is therefore expected to exhibit high electric conductivity at
low temperature, similar to a real superconductor. The stability of this
correlated state requires high density of electronic states in the vicinity of
the crossing point -- a feature that may occur in twisted multilayer graphene
structures, which are experimentally available. Our findings thus open an
exciting opportunity for creating a new class of highly conductive materials.
Four-dimensional scanning transmission electron microscopy (4D-STEM) has
recently gained widespread attention for its ability to image atomic electric
fields with sub-{\AA}ngstrom spatial resolution. These electric field maps
represent the integrated effect of the nucleus, core electrons and valence
electrons, and separating their contributions is non-trivial. In this paper, we
utilized simultaneously acquired 4D-STEM center of mass (CoM) images and
annular dark field (ADF) images to determine the electron charge density in
monolayer MoS2. We find that both the core electrons and the valence electrons
contribute to the derived electron charge density. However, due to blurring by
the probe shape, the valence electron contribution forms a nearly featureless
background while most of the spatial modulation comes from the core electrons.
Our findings highlight the importance of probe shape in interpreting charge
densities derived from 4D STEM.
We extend the continuum theories of active nematohydrodynamics to model a
two-fluid mixture with separate velocity fields for each fluid component,
coupled through a viscous drag. The model is used to study an active nematic
fluid, mixed with an isotropic fluid. We find micro-phase separation, and argue
that this results from an interplay between active anchoring and active flows
driven by concentration gradients. The results may be relevant to cell-sorting
and the formation of lipid rafts in cell membranes.
We theoretically discuss electronic transport via Majorana states in magnetic
topological insulator-superconductor junctions with an asymmetric split of the
applied bias voltage. We study normal-superconductor-normal (NSN) junctions
made of narrow (wire-like) or wide (film-like) magnetic topological insulator
slabs with a central proximitized superconducting sector. The occurrence of
charge non-conserving Andreev processes entails a nonzero conductance related
to an electric current flowing to ground from the proximitized sector of the
NSN junction. We show that topologically-protected Majorana modes require an
antisymmetry of this conductance with respect to the point of equally split
bias voltage across the junction.
We provide a universal tight bound on the energy gap of topological
insulators by exploring relationships between topology, quantum geometry, and
optical absorption. Applications of our theory to infrared absorption near
topological band inversion, magnetic circular dichorism in Chern insulators,
and topological gap in moir\'e materials are demonstrated.
Equilibrium atomic configuration and electronic structure of the (001)
surface of IV-VI semiconductors PbTe, PbSe, SnTe and SnSe, is studied using the
density functional theory (DFT) methods. At surfaces of all those compounds,
the displacements of ions from their perfect lattice sites reveal two features
characteristic of the rock salt crystals. First, the ionic displacements occur
only along the direction perpendicular to the surface, and they exhibit the
rumpling effect, i.e., the vertical shifts of cations and anions differ.
Second, the interlayer spacing of the first few monolayers at the surface
oscillates. Our results are in good agreement with the previous X-ray
experimental data and theoretical results where available. They also are
consistent with the presence of two {110} mirror planes at the (001) surface of
the rock salt. One the other hand, experiments preformed for the topological
Pb$_{1-x}$Sn$_x$ Se alloy indicate breaking of the mirror symmetry due to a
large 0.3 {\AA} relative displacement of the cation and anion sublattices at
the surface, which induces the opening of the gap of the Dirac cones. Our
results for Pb$_{1-x}$Sn$_x$Se including the simulated STM images, are in
contradiction with these findings, since surface reconstructions with broken
symmetry are never the ground state configurations. The impact of the
theoretically determined surface configurations and of the chemical disorder on
the surface states is analyzed.
The algebraic tools used to study topological phases of matter are not
clearly suited to studying processes in which the bulk energy gap closes, such
as phase transitions. We describe an elementary two edge thought experiment
which reveals the effect of an anyon condensation phase transition on the
robust edge properties of a sample, bypassing a limitation of the algebraic
description. In particular, the two edge construction allows some edge degrees
of freedom to be tracked through the transition, despite the bulk gap closing.
The two edge model demonstrates that bulk anyon condensation induces symmetry
breaking in the edge model. Further, the construction recovers the expected
result that the number of chiral current carrying modes at the edge cannot
change through anyon condensation. We illustrate the construction through
detailed analysis of anyon condensation transitions in an achiral phase, the
toric code, and in chiral phases, the Kitaev spin liquids.
Raman spectroscopy is widely used to assess the quality of 2D materials thin
films. This report focuses on $\rm{PtSe_2}$, a noble transition metal
dichalcogenide which has the remarkable property to transit from a
semi-conductor to a semi-metal with increasing layer number. While
polycrystalline $\rm{PtSe_2}$ can be grown with various cristalline qualities,
getting insight into the monocrystalline intrinsic properties remains
challenging. We report on the study of exfoliated 1 to 10 layers $\rm{PtSe_2}$
by Raman spectroscopy, featuring record linewidth. The clear Raman signatures
allow layer-thickness identification and provides a reference metrics to assess
crystal quality of grown films.

Date of feed: Wed, 02 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]+) **Large circular photocurrent in non-centrosymmetric magnetic Weyl semimetal CeAlSi. (arXiv:2308.00045v1 [cond-mat.mes-hall])**

Abhirup Roy Karmakar, A. Taraphder, G. P. Das

**MoS$_{2}$/Al$_{0.68}$Sc$_{0.32}$N negative capacitance field-effect transistors. (arXiv:2308.00067v1 [cond-mat.mtrl-sci])**

Seunguk Song, Kwan-Ho Kim, Srikrishna Chakravarthi, Zirun Han, Gwangwoo Kim, Kyung Yeol Ma, Hyeon Suk Shin, Roy H. Olsson III, Deep Jariwala

**Diverse universality classes of the topological deconfinement transitions of three-dimensional noncompact lattice Abelian-Higgs models. (arXiv:2308.00101v1 [cond-mat.stat-mech])**

Claudio Bonati, Andrea Pelissetto, Ettore Vicari

**Doped 2D diamond: properties and applications. (arXiv:2308.00124v1 [cond-mat.mtrl-sci])**

Bruno Ipaves, João F. Justo, Biplab Sanyal, Lucy V. C. Assali

**No Strings Attached: Boundaries and Defects in the Cubic Code. (arXiv:2308.00138v1 [quant-ph])**

Cory T. Aitchison, Daniel Bulmash, Arpit Dua, Andrew C. Doherty, Dominic J. Williamson

**Performance benchmarking of an ultra-low vibration laboratory to host a commercial millikelvin scanning tunnelling microscope. (arXiv:2308.00333v1 [cond-mat.supr-con])**

Yande Que, Amit Kumar, Michael S. Lodge, Zhengjue Tong, Marcus Lai Kar Fai, Wei Tao, Zhenhao Cui, Ranjith Shivajirao, Junxiang Jia, Siew Eang Lee, Bent Weber

**Local polar order controls mechanical stress and triggers layer formation in developing Myxococcus xanthus colonies. (arXiv:2308.00368v1 [cond-mat.soft])**

Endao Han, Chenyi Fei, Ricard Alert, Katherine Copenhagen, Matthias D. Koch, Ned S. Wingreen, Joshua W. Shaevitz

**CMOS on-chip thermometry at deep cryogenic temperatures. (arXiv:2308.00392v1 [physics.app-ph])**

Grayson M. Noah, Thomas Swift, Mathieu de Kruijf, Alberto Gomez-Saiz, John J. L. Morton, M. Fernando Gonzalez-Zalba

**Field-Emission Resonances in Thin Metallic Films: Nonexponential Decay of the Tunneling Current as a Function of the Sample-to-Tip Distance. (arXiv:2308.00418v1 [cond-mat.mes-hall])**

A. Yu. Aladyshkin, K. Schouteden

**Hydrostatic Pressure Induced Anomalous Enhancement in the Thermoelectric Performance of Monolayer MoS$_{2}$. (arXiv:2308.00423v1 [cond-mat.mtrl-sci])**

Saumen Chaudhuri, Amrita Bhattacharya, A. K. Das, G. P. Das, B. N. Dev

**Electrical detection and nucleation of a magnetic skyrmion in a magnetic tunnel junction observed via operando magnetic microscopy. (arXiv:2308.00445v1 [cond-mat.mtrl-sci])**

by J. Urrestarazu Larrañaga, Naveen Sisodia, Van Tuong Pham, Ilaria Di Manici, Aurélien Masseboeuf, Kevin Garello, Florian Disdier, Bruno Fernandez, Sebastian Wintz, Markus Weigand, Mohamed Belmeguenai, Stefania Pizzini, Ricardo Sousa, Liliana Buda-Prejbeanu, Gilles Gaudin, Olivier Boulle

**A Platform for Far-Infrared Spectroscopy of Quantum Materials at Millikelvin Temperatures. (arXiv:2308.00610v1 [cond-mat.mes-hall])**

Michael Onyszczak, Ayelet J. Uzan, Yue Tang, Pengjie Wang, Yanyu Jia, Guo Yu, Tiancheng Song, Ratnadwip Singha, Jason F. Khoury, Leslie M. Schoop, Sanfeng Wu

**Electronic structure of the putative room-temperature superconductor Pb$_9$Cu(PO$_4$)$_6$O. (arXiv:2308.00676v1 [cond-mat.supr-con])**

Liang Si, Karsten Held

**On the vibrational properties of transition metal doped ZnO: surface, defect, and bandgap engineering. (arXiv:2308.00684v1 [cond-mat.mtrl-sci])**

Viviane M. A. Lage, Carlos Rodríguez-Fernández, Felipe S. Vieira, Rafael T. da Silva, Maria Inês B. Bernardi, Maurício M de Lima Jr., Andrés Cantarero, Hugo B. de Carvalho

**Strain Driven Anomalous Anisotropic Enhancement in the Thermoelectric Performance of monolayer MoS$_{2}$. (arXiv:2203.12991v2 [cond-mat.mtrl-sci] UPDATED)**

Saumen Chaudhuri, Amrita Bhattacharya, A. K. Das, G. P. Das, B. N. Dev

**Electron pairing across a band intersection may create a highly conductive state. (arXiv:2207.05974v2 [cond-mat.str-el] UPDATED)**

Maxim Trushin, Liangtao Peng, Girish Sharma, Giovanni Vignale, Shaffique Adam

**Imaging the electron charge density in monolayer MoS2 at the {\AA}ngstrom scale. (arXiv:2210.09478v3 [cond-mat.mtrl-sci] UPDATED)**

Joel Martis, Sandhya Susarla, Archith Rayabharam, Cong Su, Timothy Paule, Philipp Pelz, Cassandra Huff, Xintong Xu, Hao-Kun Li, Marc Jaikissoon, Victoria Chen, Eric Pop, Krishna Saraswat, Alex Zettl, Narayana R. Aluru, Ramamoorthy Ramesh, Peter Ercius, Arun Majumdar

**Phase Separation Driven by Active Flows. (arXiv:2302.00153v2 [cond-mat.soft] UPDATED)**

Saraswat Bhattacharyya, Julia M. Yeomans

**Conductance asymmetry in proximitized magnetic topological insulator junctions with Majorana modes. (arXiv:2303.16261v2 [cond-mat.mes-hall] UPDATED)**

Daniele Di Miceli, Eduárd Zsurka, Julian Legendre, Kristof Moors, Thomas Schmidt, Llorenç Serra

**Fundamental bound on topological gap. (arXiv:2306.00078v2 [cond-mat.mes-hall] UPDATED)**

Yugo Onishi, Liang Fu

**Reconstruction, rumpling, and Dirac states at the (001) surface of a topological crystalline insulator Pb1-xSnxSe. (arXiv:2306.03582v2 [cond-mat.mtrl-sci] UPDATED)**

A. Łusakowski, P. Bogusławski, T. Story

**Edge Theories for Anyon Condensation Phase Transitions. (arXiv:2307.12509v2 [cond-mat.str-el] UPDATED)**

David M. Long, Andrew C. Doherty

**Raman Spectroscopy of Monolayer to Bulk PtSe2 Exfoliated Crystals. (arXiv:2307.15520v2 [cond-mat.mtrl-sci] UPDATED)**

Marin Tharrault, Eva Desgué, Dominique Carisetti, Bernard Plaçais, Christophe Voisin, Pierre Legagneux, Emmanuel Baudin

Found 2 papers in prb The parallels between the models of the weakly interacting Bose gas and elastic pseudogauge fields coupled to the massive Dirac fermions in two spatial dimensions reveal an intricate property of the Berry term in the former as compared to the Chern-Simons term of the latter. Guided by the Bogoliubov… Single-layer $α$-ruthenium trichloride $(α\text{−}{\mathrm{RuCl}}_{3})$ has been proposed as a potential quantum spin liquid. Graphene/${\mathrm{RuCl}}_{3}$ heterobilayers have been extensively studied with a focus on the large interlayer electron transfer that dopes both materials. Here we examine …

Date of feed: Wed, 02 Aug 2023 03:17:01 GMT**Search terms: **(topolog[a-z]+)|(graphit[a-z]+)|(rhombohedr[a-z]+)|(graphe[a-z]+)|(chalcog[a-z]+)|(landau)|(weyl)|(dirac)|(STM)|(scan[a-z]+ tunne[a-z]+ micr[a-z]+)|(scan[a-z]+ tunne[a-z]+ spectr[a-z]+)|(scan[a-z]+ prob[a-z]+ micr[a-z]+)|(MoS.+\d+|MoS\d+)|(MoSe.+\d+|MoSe\d+)|(MoTe.+\d+|MoTe\d+)|(WS.+\d+|WS\d+)|(WSe.+\d+|WSe\d+)|(WTe.+\d+|WTe\d+)|(Bi\d+Rh\d+I\d+|Bi.+\d+.+Rh.+\d+.+I.+\d+.+)|(BiTeI)|(BiTeBr)|(BiTeCl)|(ZrTe5|ZrTe.+5)|(Pt2HgSe3|Pt.+2HgSe.+3)|(jacuting[a-z]+) **Condensation of elastic pseudogauge fields and quantized response in the condensates**

Andreas Sinner and Zeinab Rashidian

Author(s): Andreas Sinner and Zeinab Rashidian

[Phys. Rev. B 108, 054501] Published Tue Aug 01, 2023

**Magnetic states of graphene proximitized Kitaev materials**

Jingtian Shi and A. H. MacDonald

Author(s): Jingtian Shi and A. H. MacDonald

[Phys. Rev. B 108, 064401] Published Tue Aug 01, 2023

Found 6 papers in prl We find that the duality between color and kinematics can be used to inform the high energy behavior of effective field theories. Namely, we demonstrate that the massless gauge theory of Yang-Mills deformed by a higher-derivative ${F}^{3}$ operator cannot be tree level color dual while consistently … MINERvA has measured the ${ν}_{μ}$-induced coherent ${π}^{+}$ cross section simultaneously in hydrocarbon (CH), graphite (C), iron (Fe), and lead (Pb) targets using neutrinos from 2 to 20 GeV. The measurements exceed the predictions of the Rein-Sehgal and Berger-Sehgal PCAC based models at multi-GeV… Inspired from electronic systems, topological photonics aims to engineer new optical devices with robust properties. In many cases, the ideas from topological phases protected by internal symmetries in fermionic systems are extended to those protected by crystalline symmetries. One such popular phot… Robust attraction and low-energy symmetry properties in transition metal dichalcogenide twisted bilayers may produce topologically protected superconductivity. We study quantum phase transitions of three-dimensional disordered systems in the chiral classes (AIII and BDI) with and without weak topological indices. We show that the systems with a nontrivial weak topological index universally exhibit an emergent thermodynamic phase where wave functions are de… The even-denominator fractional quantum Hall states (FQHSs) in half-filled Landau levels are generally believed to host non-Abelian quasiparticles and be of potential use in topological quantum computing. Of particular interest is the competition and interplay between the even-denominator FQHSs and …

Date of feed: Wed, 02 Aug 2023 03:17:02 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]+) **Color-Dual Fates of ${F}^{3}$, ${R}^{3}$, and $\mathcal{N}=4$ Supergravity**

John Joseph M. Carrasco, Matthew Lewandowski, and Nicolas H. Pavao

Author(s): John Joseph M. Carrasco, Matthew Lewandowski, and Nicolas H. Pavao

[Phys. Rev. Lett. 131, 051601] Published Tue Aug 01, 2023

**Neutrino-Induced Coherent ${π}^{+}$ Production in C, CH, Fe, and Pb at $⟨{E}_{ν}⟩∼6\text{ }\text{ }\mathrm{GeV}$**

M. A. Ramírez *et al.* (The MINERvA Collaboration)

Author(s): M. A. Ramírez *et al.* (The MINERvA Collaboration)

[Phys. Rev. Lett. 131, 051801] Published Tue Aug 01, 2023

**Absence of Topological Protection of the Interface States in ${\mathbb{Z}}_{2}$ Photonic Crystals**

Shupeng Xu, Yuhui Wang, and Ritesh Agarwal

Author(s): Shupeng Xu, Yuhui Wang, and Ritesh Agarwal

[Phys. Rev. Lett. 131, 053802] Published Tue Aug 01, 2023

**Topological Superconductivity in Doped Magnetic Moiré Semiconductors**

Valentin Crépel, Daniele Guerci, Jennifer Cano, J. H. Pixley, and Andrew Millis

Author(s): Valentin Crépel, Daniele Guerci, Jennifer Cano, J. H. Pixley, and Andrew Millis

[Phys. Rev. Lett. 131, 056001] Published Tue Aug 01, 2023

**Anisotropic Topological Anderson Transitions in Chiral Symmetry Classes**

Zhenyu Xiao, Kohei Kawabata, Xunlong Luo, Tomi Ohtsuki, and Ryuichi Shindou

Author(s): Zhenyu Xiao, Kohei Kawabata, Xunlong Luo, Tomi Ohtsuki, and Ryuichi Shindou

[Phys. Rev. Lett. 131, 056301] Published Tue Aug 01, 2023

**Highly Anisotropic Even-Denominator Fractional Quantum Hall State in an Orbitally Coupled Half-Filled Landau Level**

Chengyu Wang, A. Gupta, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, and M. Shayegan

Author(s): Chengyu Wang, A. Gupta, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler, and M. Shayegan

[Phys. Rev. Lett. 131, 056302] Published Tue Aug 01, 2023

Found 1 papers in sci-rep Scientific Reports, Published online: 01 August 2023; doi:10.1038/s41598-023-39544-1**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]+)