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Influence of structural deformations on the reentrant conductance
feature in semiconducting nanowires: Helical states can be measured through the observation of the reentrant
behaviour, which is a dip in the conductance probed in semiconducting nanowires
(NWs) with strong spin-orbit coupling (SOC) under the presence ... | cond-mat_mes-hall |
Electron drift velocity control in GaAs-in-Al2O3 quantum wire transistor
structure due to the electron scattering rate alteration: Electron transport in the transistor structure based on thin undoped
GaAs-in-Al2O3 quantum wire is simulated by ensemble Monte-Carlo method taking
into account electron scattering by the ... | cond-mat_mes-hall |
Optical control and decoherence of spin qubits in quantum dots: We discuss various methods of all-optical spin control in semiconductor
quantum dots. We present different ways of rotating a single confined electron
spin by optical coupling to a trion state. We also discuss a method for
controlling the polarization of a... | cond-mat_mes-hall |
Electronic Conduction in Short DNA Wires: A strict method is used to calculate the current-voltage characteristics of a
double-stranded DNA. A more reliable model considering the electrostatic
potential drop along an individual DNA molecular wire between the contacts is
considered and the corresponding Green's Function... | cond-mat_mes-hall |
Exceptional rings protected by emergent symmetry for mechanical systems: We propose mechanical systems, described by Newton's equation of motion, as
suited platforms for symmetry protection of non-Hermitian topological
degeneracies. We point out that systems possess emergent symmetry, which is a
unique properties of me... | cond-mat_mes-hall |
Non-equilibrium dynamics in coupled quantum dots: The aim of this work is to study the non-equilibrium dynamics of electrons in
a coupled quantum well pair. To achieve this aim, we consider a non-symmetric
distribution of electrons in a double quantum well. We derive the nonlinear
dynamical evolution of the carrier wav... | cond-mat_mes-hall |
All epitaxial self-assembly of vertically-confined silicon color centers
using ultra-low temperature epitaxy: Silicon-based color centers (SiCCs) have recently emerged as a source of
quantum light that could be well combined with existing telecom-based Si
Photonics platforms. However, considering the current SiCC fab... | cond-mat_mes-hall |
Magnetic nanoparticle sensing: decoupling the magnetization from the
excitation field: Remote sensing of magnetic nanoparticles has exciting applications for
magnetic nanoparticle hyperthermia and molecular detection. We introduce,
simulate, and experimentally demonstrate an innovation---a sensing coil that is
geomet... | cond-mat_mes-hall |
Ground state correlations in a trapped quasi one-dimensional Bose Gas: We review the basic concepts of a non-equilibrium kinetic theory of a trapped
bosonic gas. By extending the successful mean-field concept of the
Gross-Pitaevskii equation with the effects of non-local, two particle quantum
correlations, one obtains ... | cond-mat_mes-hall |
Unconventional Bloch-Grüneisen scattering in hybrid Bose-Fermi
systems: We report on the novel mechanism of electron scattering in hybrid Bose-Fermi
systems consisting of a two-dimensional electron gas in the vicinity of an
exciton condensate: We show that a pair-of-bogolons--mediated scattering proves
to be dominati... | cond-mat_mes-hall |
Ar+-sputtered Ge (001) surface nanostructuring at high implant
temperature: Ion sputtering induced nanoscale pattern formation on Ge (001) surface by 500
eV Ar+ bombardment has been investigated for a wide range of ion incidence
angles at temperature of 300 deg.C. A fourfold symmetric topography forms in
the angular ... | cond-mat_mes-hall |
DFT modelling of the effect of strong magnetic field on Aniline molecule: Aniline is an organic compound with the stoichiometric expression
$C_{6}H_{5}NH_{2}$; consisting of a phenyl structure attached to an amino
group. It is colorless, but it slowly oxidizes and resinifies in air, giving a
red-brown tint to aged samp... | cond-mat_mes-hall |
Energetics of metal slabs and clusters: the rectangle-box model: An expansion of energy characteristics of wide thin slab of thickness L in
power of 1/L is constructed using the free-electron approximation and the model
of a potential well of finite depth. Accuracy of results in each order of the
expansion is analyzed.... | cond-mat_mes-hall |
Voltage tunable quantum dot array by patterned Ge-nanowire based
metal-oxide-semiconductor (MOS) devices: Semiconductor quantum dots (QDs) are being regarded as the primary unit for a
wide range of advanced and emerging technologies including electronics,
optoelectronics, photovoltaics and biosensing applications as ... | cond-mat_mes-hall |
Dirac Spin-Orbit Torques at the Surface of Topological Insulators: We address the nature of spin-orbit torques at the magnetic surfaces of
topological insulators, using both Kubo formula and Keldysh formalism. Through
the analysis of the derived spin-charge equations, we find that the so-called
Dirac torques possess a ... | cond-mat_mes-hall |
Zero-field Time Correlation Functions of Four Classical Heisenberg Spins
on a Ring: A model relevant for the study of certain molecular magnets is the ring of
N=4 classical spins with equal near-neighbor isotropic Heisenberg exchange
interactions. Assuming classical Heisenberg spin dynamics, we solve explicitly
for t... | cond-mat_mes-hall |
Interplay of spin-orbit coupling and Coulomb interaction in ZnO-based
electron system: Spin-orbit coupling (SOC) is pivotal for various fundamental spin-dependent
phenomena in solids and their technological applications. In semiconductors,
these phenomena have been so far studied in relatively weak electron-electron
... | cond-mat_mes-hall |
Thermoelectric response of fractional quantized Hall and re-entrant
insulating states in the N=1 Landau level: Detailed measurements of the longitudinal thermopower of two-dimensional
electrons in the first excited Landau level are reported. Clear signatures of
numerous fractional quantized Hall states, including tho... | cond-mat_mes-hall |
Conductance saturation in a series of highly transmitting molecular
junctions: Understanding the properties of electronic transport across metal-molecule
interfaces is of central importance for controlling a large variety of
molecular-based devices such as organic light emitting diodes, nanoscale
organic spin-valves ... | cond-mat_mes-hall |
Rashba effect and magnetic field in quantum wires: We investigate the influence of a perpendicular magnetic field on the
spectral and spin properties of a ballistic quasi-one-dimensional electron
system with Rashba effect. The magnetic field strongly alters the spin-orbit
induced modification to the subband structure w... | cond-mat_mes-hall |
Transport phenomena in helical edge states interferometers. A Green's
function approach: We analyze the current and the shot-noise of an electron interferometer made
of the helical edge states of a two-dimensional topological insulator within
the framework of non-equilibrium Green's functions formalism. We study in
d... | cond-mat_mes-hall |
Electrical transport between epitaxial manganites and carbon nanotubes: The possibility of performing spintronics at the molecular level may be
realized in devices that combine fully spin polarized oxides such as manganites
with carbon nanotubes. However, it is not clear whether electrical transport
between such differ... | cond-mat_mes-hall |
On the radiative lifetime of free-moving two-dimensional excitons: A simple microscopic mechanism explaining the linear dependence of the
radiative lifetime of free-moving two-dimensional excitons on their effective
temperature is suggested. It is shown that there exists a characteristic
effective temperature (of about... | cond-mat_mes-hall |
Resonant dynamics of skyrmion lattices in thin film multilayers:
Localised modes and spin wave emission: The spectral signatures of magnetic skyrmions under microwave field
excitation are of fundamental interest and can be an asset for high frequency
applications. These topological solitons can be tailored in multila... | cond-mat_mes-hall |
Ideal Chern bands are Landau levels in curved space: We prove that all the criteria proposed in the literature to identify a Chern
band hosting exact fractional Chern insulating ground states, in fact, describe
an equivalence with a lowest Landau level defined in curved space under a
non-uniform magnetic field. In addi... | cond-mat_mes-hall |
Current-driven ferromagnetic resonance, mechanical torques and rotary
motion in magnetic nanostructures: We study theoretically the detection and possible utilization of electric
current-induced mechanical torques in ferromagnetic-normal metal
heterostructures that are generated by spin-flip scattering or the absorpt... | cond-mat_mes-hall |
Robust polaritons in magnetic monolayers of CrI3: We show that the regime of strong-light matter coupling with remarkable
magnetic properties can be realized in systems based on monolayers of chromium
triiodide (CrI3). This two-dimensional material combines the presence of
ferromagnetic ordering with the possibility of... | cond-mat_mes-hall |
Two-Dimensional Wide-Band-Gap II-V Semiconductors with a Dilated
Graphene-like Structure: Since the advent of graphene, two-dimensional (2D) materials become very
attractive and there is growing interest to explore new 2D beyond graphene.
Here, through density functional theory (DFT) calculations, we predict 2D
wide-... | cond-mat_mes-hall |
Dipole representation of half-filled Landau level: We introduce a variant of dipole representation for composite fermions in a
half-filled Landau level, taking into account the symmetry under exchange of
particles and holes. This is implemented by a special constraint on composite
fermion and composite hole degree of f... | cond-mat_mes-hall |
Emergent topological fields and relativistic phonons within the
thermoelectricity in topological insulators: Topological edge states are predicted to be responsible for the high
efficient thermoelectric response of topological insulators, currently the best
thermoelectric materials. However, to explain their figure o... | cond-mat_mes-hall |
OLEDs as models for bird magnetoception: detecting electron spin
resonance in geomagnetic fields: Certain species of living creatures are known to orientate themselves in the
geomagnetic field. Given the small magnitude of approximately 48 {\mu}T, the
underlying quantum mechanical phenomena are expected to exhibit co... | cond-mat_mes-hall |
Deflection of (anti)ferromagnetic skyrmions at heterochiral interfaces: Devising magnetic nanostructures with spatially heterogeneous
Dzyaloshinskii-Moriya interaction (DMI) is a promising pathway towards advanced
confinement and control of magnetic skyrmions in potential devices. Here we
discuss theoretically how a sk... | cond-mat_mes-hall |
Excess electron screening of remote donors and mobility in modern
GaAs/AlGaAs herostructures: In modern GaAs/Al$_x$Ga$_{1-x}$As heterostructures with record high
mobilities, a two-dimensional electron gas (2DEG) in a quantum well is provided
by two remote donor $\delta$-layers placed on both sides of the well. Each
$... | cond-mat_mes-hall |
Large low-frequency resistance noise in chemical vapor deposited
graphene: We report a detailed investigation of resistance noise in single layer
graphene films on Si/SiO$_2$ substrates obtained by chemical vapor deposition
(CVD) on copper foils. We find that noise in these systems to be rather large,
and when expres... | cond-mat_mes-hall |
Robustness of Helical Edge States Under Edge Reconstruction: The helical edge states of time-reversal invariant two-dimensional
topological insulators are protected against backscattering in idealized
models. In more realistic scenarios with a shallow confining potential at the
sample boundary, additional strongly inte... | cond-mat_mes-hall |
Anisotropy-assisted magnon condensation in ferromagnetic thin films: We theoretically demonstrate that adding an easy-axis magnetic anisotropy
facilitates magnon condensation in thin yttrium iron garnet (YIG) films.
Dipolar interactions in a quasi-equilibrium state stabilize room-temperature
magnon condensation in YIG.... | cond-mat_mes-hall |
Quantum criticality in a double quantum-dot system: We discuss the realization of the quantum-critical non-Fermi liquid state,
originally discovered within the two-impurity Kondo model, in double
quantum-dot systems. Contrary to the common belief, the corresponding fixed
point is robust against particle-hole and variou... | cond-mat_mes-hall |
Radio-frequency methods for Majorana-based quantum devices: fast charge
sensing and phase diagram mapping: Radio-frequency (RF) reflectometry is implemented in hybrid
semiconductor-superconductor nanowire systems designed to probe Majorana zero
modes. Two approaches are presented. In the first, hybrid nanowire-based
... | cond-mat_mes-hall |
Sign reversal of magnetoresistivity in massive nodal-line semimetals due
to Lifshitz transition of Fermi surface: Topological nodal-line semimetals offer an interesting research platform to
explore novel phenomena associated with its torus-shaped Fermi surface. Here,
we study magnetotransport in the massive nodal-lin... | cond-mat_mes-hall |
Non-Boltzmann classical correction to the velocity auto-correlation
function for isotropic scattering in two dimensions: The classical correction to the velocity auto-correlation function of
non-interacting particles due to memory effects, which are beyond the Boltzmann
equation, is calculated both analytically and n... | cond-mat_mes-hall |
Magnetoelectric effects and valley controlled spin quantum gates in
transition metal dichalcogenide bilayers: In monolayer group-VI transition metal dichalcogenides (TMDC), charge
carriers have spin and valley degrees of freedom, both associated with magnetic
moments. On the other hand, the layer degree of freedom in... | cond-mat_mes-hall |
Interplay of valley, layer and band topology towards interacting quantum
phases in bilayer graphene moire superlattice: A Bilayer of semiconducting 2D electronic systems has long been a versatile
platform to study electronic correlation with tunable interlayer tunneling,
Coulomb interactions and layer imbalance. In t... | cond-mat_mes-hall |
Mechanical Mixing in Nonlinear Nanomechanical Resonators: Nanomechanical resonators, machined out of Silicon-on-Insulator wafers, are
operated in the nonlinear regime to investigate higher-order mechanical mixing
at radio frequencies, relevant to signal processing and nonlinear dynamics on
nanometer scales. Driven by t... | cond-mat_mes-hall |
Surface Recombination Limited Lifetimes of Photoexcited Carriers in
Few-Layer Transition Metal Dichalcogenide MoS2: We present results on photoexcited carrier lifetimes in few-layer transition
metal dichalcogenide MoS2 using nondegenerate ultrafast optical pump-probe
technique. Our results show a sharp increase of th... | cond-mat_mes-hall |
Quasiparticle diffusion based heating in superconductor tunneling
micro-coolers: In a hybrid Superconductor - Insulator - Normal metal tunnel junction biased
just below the gap, the extraction of hot electrons out of the normal metal
results in electronic cooling effect. The quasiparticles injected in the
superconduc... | cond-mat_mes-hall |
Fingerprints of Qubit Noise in Transient Cavity Transmission: Noise affects the coherence of qubits and thereby places a bound on the
performance of quantum computers. We theoretically study a generic two-level
system with fluctuating control parameters in a photonic cavity and find that
basic features of the noise spe... | cond-mat_mes-hall |
From chaos to disorder: Statistics of the eigenfunctions of microwave
cavities: We study the statistics of the experimental eigenfunctions of chaotic and
disordered microwave billiards in terms of the moments of their spatial
distributions, such as the Inverse Participation Ratio (IPR) and
density-density auto-correl... | cond-mat_mes-hall |
The next nearest neighbor effect on the 2D materials properties: In this work, the effect of introducing next nearest neighbor (NNN) hopping
to the 2D materials was studied using the graphene 2D honeycomb two sublattice
as an example. It is found that introducing NNN to the 2D materials removes the
symmetry around the ... | cond-mat_mes-hall |
Dephasing effect promotes the appearance of quantized Hall plateaus: The quantum Hall effect (QHE) is a topologically protected phenomenon which
has been observed in various systems. In experiments, the size of Hall bar
device to realize the QHE is generally much larger than the phase coherence
length, in which the qua... | cond-mat_mes-hall |
Quantum magnetism and topological superconductivity in Yu-Shiba-Rusinov
chains: Chains of magnetic adatoms on superconductors have been discussed as
promising systems for realizing Majorana end states. Here, we show that dilute
Yu-Shiba-Rusinov (YSR) chains are also a versatile platform for quantum
magnetism and corr... | cond-mat_mes-hall |
Giant Magnetoresistance Oscillations Induced by Microwave Radiation and
a Zero-Resistance State in a 2D Electron System with a Moderate Mobility: The effect of a microwave field in the frequency range from 54 to 140
$\mathrm{GHz}$ on the magnetotransport in a GaAs quantum well with AlAs/GaAs
superlattice barriers and... | cond-mat_mes-hall |
Charge frustration in a triangular triple quantum dot: We experimentally investigate the charge (isospin) frustration induced by a
geometrical symmetry in a triangular triple quantum dot. We observe the
ground-state charge configurations of six-fold degeneracy, the manifestation of
the frustration. The frustration resu... | cond-mat_mes-hall |
Anomalous Characteristics of the Generation - Recombination Noise in
Quasi-One-Dimensional Van der Waals Nanoribbons: We describe the low-frequency current fluctuations, i.e. electronic noise, in
quasi-one-dimensional ZrTe3 van der Waals nanoribbons, which have recently
attracted attention owing to their extraordinar... | cond-mat_mes-hall |
Anisotropic contribution to the van der Waals and the Casimir-Polder
energies for CO$_2$ and CH$_4$ molecules near surfaces and thin films: In order to understand why carbon dioxide (CO$_2$) and methane (CH$_4$)
molecules interact differently with surfaces, we investigate the Casimir-Polder
energy of a linearly polar... | cond-mat_mes-hall |
Machine learning nonequilibrium electron forces for adiabatic spin
dynamics: We present a generalized potential theory of nonequilibrium torques for the
Landau-Lifshitz equation. The general formulation of exchange forces in terms
of two potential energies allows for the implementation of accurate machine
learning mo... | cond-mat_mes-hall |
Super-fermion representation of the Lindblad master equation for the
electron transport problem: We discuss the use of super-fermion formalism to represent and solve quantum
kinetic equations for the electron transport problem. Starting with the
Lindblad master equation for the molecule connected to two metal electro... | cond-mat_mes-hall |
Optical conductivity as a probe of the interaction-driven metal in
rhombohedral trilayer graphene: Study of the strongly correlated states in van der Waals heterostructures is
one of the central topics in modern condensed matter physics. Among these, the
rhombohedral trilayer graphene (RTG) occupies a prominent place... | cond-mat_mes-hall |
Electron-hole spin flip-flop in semiconductor quantum dots: We use temporally resolved intensity cross-correlation measurements to
identify the biexciton-exciton radiative cascades in a negatively charged QD.
The polarization sensitive correlation measurements show unambiguously that the
excited two electron triplet st... | cond-mat_mes-hall |
Breakdown of topological protection due to non-magnetic edge disorder in
two-dimensional materials in the Quantum Spin Hall phase: We study the suppression of the conductance quantization in quantum spin Hall
systems by a combined effect of electronic interactions and edge disorder, that
is ubiquitous in exfoliated a... | cond-mat_mes-hall |
Topological Quantum Computation Based on Chiral Majorana Fermions: Chiral Majorana fermion is a massless self-conjugate fermion which can arise
as the edge state of certain two-dimensonal topological matters. It has been
theoretically predicted and experimentally observed in a hybrid device of
quantum anomalous Hall in... | cond-mat_mes-hall |
Bolometric arrays and infrared sensitivity of VO2 films with varying
stoichiometry: Here we propose a linear microbolometric array based on VOx thin films. The
linear microbolometric array is fabricated by using micromachining technology,
and its thermo-sensitive VOx thin film has excellent infrared response spectrum... | cond-mat_mes-hall |
Generalized Bloch theorem and topological characterization: The Bloch theorem enables reduction of the eigenvalue problem of the
single-particle Hamiltonian that commutes with translational group. Based on a
group theory analysis we present generalization of the Bloch theorem that
incorporates all additional symmetries... | cond-mat_mes-hall |
Mechanisms of optical orientation of an individual Mn$^{2+}$ ion spin in
a II-VI quantum dot: We provide a theoretical description of the optical orientation of a single
Mn$^{2+}$ ion spin under quasi-resonant excitation demonstrated experimentally
by Goryca et al. [Phys. Rev. Lett. 103, 087401 (2009)]. We build and ... | cond-mat_mes-hall |
Element-specific soft X-ray spectroscopy, scattering and imaging studies
of skyrmion-hosting compound Co$_8$Zn$_8$Mn$_4$: A room-temperature skyrmion-hosting compound Co$_8$Zn$_8$Mn$_4$ has been
examined by means of soft X-ray absorption spectroscopy, resonant small-angle
scattering and extended reference holography.... | cond-mat_mes-hall |
Modified Confinement Model for Size Dependent Raman Shift and Linewidth
of Silicon Nanocrystals: A modified phonon confinement model considering the size distribution, an
improved phonon dispersion curve and a confinement function is developed for
the calculation of size dependent Raman spectra of the silicon (Si)
na... | cond-mat_mes-hall |
Antiferromagnetic Magnonic Crystals: We describe the features of magnonic crystals based upon antiferromagnetic
elements. Our main results are that with a periodic modulation of either
magnetic fields or system characteristics, such as the anisotropy, it is
possible to tailor the spin wave spectra of antiferromagnetic ... | cond-mat_mes-hall |
Non-quantized square-root topological insulators: a realization in
photonic Aharonov-Bohm cages: Topological Insulators are a novel state of matter where spectral bands are
characterized by quantized topological invariants. This unique quantized
non-local property commonly manifests through exotic bulk phenomena and
... | cond-mat_mes-hall |
Energetics and stability of vacancies in carbon nanotubes: In this work we present ab initio calculations of the formation energies and
stability of different types of multi-vacancies in carbon nanotubes. We
demonstrate that, as in the case of graphene, the reconstruction of the defects
has drastic effects on the energ... | cond-mat_mes-hall |
On magnetic-field-induced dissipationless electric current in helicoidal
graphene nanoribbons: We argue that twisted (helicoidal) graphene nanoribbons may support
dissipationless electric current in the presence of static uniform magnetic
field. The non-resistive charge transfer in this parity-odd system should be
en... | cond-mat_mes-hall |
Giant Zeeman splitting inducing near-unity valley polarization in van
der Waals heterostructures: Monolayers of semiconducting transition metal dichalcogenides exhibit
intriguing fundamental physics of strongly coupled spin and valley degrees of
freedom for charge carriers. While the possibility of exploiting these
p... | cond-mat_mes-hall |
Thermodynamic properties of tunneling quasiparticles in graphene-based
structures: Thermodynamic properties of quasiparticles in a graphene-based structures are
investigated. Two graphene superconducting layers (one superconducting
component is placed on the top layeredgraphene structure and the other
component in th... | cond-mat_mes-hall |
Resources of polarimetric sensitivity in spin noise spectroscopy: We attract attention to the fact that the ultimate (shot-noise-limited)
polarimetric sensitivity can be enhanced by orders of magnitude leaving the
photon flux incident onto the photodetector on the same low level. This
opportunity is of crucial importan... | cond-mat_mes-hall |
Spin Currents in Metallic Nanostructures; Explicit Calculations: In ultrathin ferromagnets deposited on metallic substrates, excitation of
precessional motion of the spins produces a spin current in the substrate that
transports angular momentum out of the film. This phenomenon is referred to as
spin pumping, and is a ... | cond-mat_mes-hall |
Moiré Imaging in Twisted Bilayer Graphene Aligned on Hexagonal Boron
Nitride: Moir\'e superlattices (MSL) formed in angle-aligned bilayers of van der Waals
materials have become a promising platform to realize novel two-dimensional
electronic states. Angle-aligned trilayer structures can form two sets of MSLs
which c... | cond-mat_mes-hall |
Non-linear transport and heat dissipation in metallic carbon nanotubes: We show that the local temperature dependence of thermalized electron and
phonon populations along metallic carbon nanotubes is the main reason behind
this non-linear transport characteristics in the high bias regime. Our model
that considers optic... | cond-mat_mes-hall |
Novel Exotic Magnetic Spin-order in Co5Ge3 Nano-size Materials: The Cobalt-germanium (Co-Ge) is a fascinating complex alloy system that has
unique structure and exhibit range of interesting magnetic properties which
would change when reduce to nanoscale dimension. At this experimental work, the
high-aspect-ratio Co5Ge3... | cond-mat_mes-hall |
Electronic transport in normal-conductor/graphene/normal-conductor
junctions and conditions for insulating behavior at a finite charge-carrier
density: We investigate the conductance of normal-conductor/graphene/normal-conductor
(NGN) junctions for arbitrary on-site potentials in the normal and graphitic
parts of t... | cond-mat_mes-hall |
A new method to epitaxially grow long-range ordered self-assembled InAs
quantum dots on (110) GaAs: We report on a new approach for positioning of self-assembled InAs quantum
dots on (110) GaAs with nanometer precision. By combining self-assembly of
quantum dots with molecular beam epitaxy on in-situ cleaved surfaces... | cond-mat_mes-hall |
Probing the helical edge states of a topological insulator by
Cooper-pair injection: We consider the proximity effect between a singlet s-wave superconductor and
the edge of a Quantum Spin Hall (QSH) topological insulator. We establish that
Andreev reflection at a QSH edge state/superconductor interface is perfect
wh... | cond-mat_mes-hall |
Spin Hall Insulator: Recent theories predict dissipationless spin current induced by an electric
field in doped semiconductors. Nevertheless, the charge current is still
dissipative in these systems. In this work, we theoretically predict the
dissipationless spin Hall effect, without any accompanying charge current, in... | cond-mat_mes-hall |
Absence of magnetic-proximity effect at the interface of Bi$_2$Se$_3$
and (Bi,Sb)$_2$Te$_3$ with EuS: We performed x-ray magnetic circular dichroism (XMCD) measurements on
heterostructures comprising topological insulators (TIs) of the
(Bi,Sb)$_2$(Se,Te)$_3$ family and the magnetic insulator EuS. XMCD measurements
al... | cond-mat_mes-hall |
Magnetoelectric control of topological phases in graphene: Topological antiferromagnetic (AFM) spintronics is an emerging field of
research, which involves the topological electronic states coupled to the AFM
order parameter known as the N$\acute{\rm e}$el vector. The control of these
states is envisioned through manip... | cond-mat_mes-hall |
Unified Semi-Classical Description of Intrinsic Spin-Hall Effect in
Spintronic, Optical, and Graphene Systems: A semi-classical description of the intrinsic spin-Hall effect (SHE) is
presented which is relevant for a wide class of systems. A heuristic model for
the SHE is developed, starting with a fully quantum mech... | cond-mat_mes-hall |
Backscattering off a driven Rashba impurity at the helical edge: The spin degree of freedom is crucial for both understanding and exploiting
the particular properties of the edges of two-dimensional topological
insulators. In the absence of superconductivity and magnetism, Rashba coupling
is the most relevant single pa... | cond-mat_mes-hall |
Electrons imitating light: Frustrated supercritical collapse in charged
arrays on graphene: The photon-like electronic dispersion of graphene bestows its charge carriers
with unusual confinement properties that depend strongly on the geometry and
strength of the surrounding potential. Here we report bottom-up synthes... | cond-mat_mes-hall |
Exact microscopic wave function for a topological quantum membrane: The higher dimensional quantum Hall liquid constructed recently supports
stable topological membrane excitations. Here we introduce a microscopic
interacting Hamiltonian and present its exact ground state wave function. We
show that this microscopic gr... | cond-mat_mes-hall |
The Synthesis and Electrical Transport of Ligand-Protected Au13 Clusters: The ligand-protected Au13 clusters have been synthesized by using
meso-2,3-imercaptosuccinic acid as the reducing and stabilizing agent.
Transmission electron microscopic analysis shows a size distribution of 0.6nm.
Optical spectrum shows an abso... | cond-mat_mes-hall |
Zero-Energy Modes from Coalescing Andreev States in a Two-Dimensional
Semiconductor-Superconductor Hybrid Platform: We investigate zero-bias conductance peaks that arise from coalescing subgap
Andreev states, consistent with emerging Majorana zero modes, in hybrid
semiconductor-superconductor wires defined in a two-d... | cond-mat_mes-hall |
Programmable two-qubit gates in capacitively coupled flopping-mode spin
qubits: Recent achievements in the field of gate defined semiconductor quantum dots
reinforce the concept of a spin-based quantum computer consisting of nodes of
locally connected qubits which communicate with each other via superconducting
circu... | cond-mat_mes-hall |
Electronic Noise of a Single Skyrmion: To enable the practical use of skyrmion-based devices, it is essential to
achieve a balance between energy efficiency and thermal stability, while also
ensuring reliable electrical detection against noise. Understanding how a
skyrmion interacts with material disorder and external ... | cond-mat_mes-hall |
Charging effects in the inductively shunted Josephson junction: The choice of impedance used to shunt a Josephson junction determines if the
charge transferred through the circuit is quantized: a capacitive shunt renders
the charge discrete, whereas an inductive shunt leads to continuous charge.
This discrepancy leads ... | cond-mat_mes-hall |
Enhanced thermoelectric properties in hybrid graphene-boron nitride
nanoribbons: The thermoelectric properties of hybrid graphene-boron nitride nanoribbons
(BCNNRs) are investigated using the non-equilibrium Green's function (NEGF)
approach. We find that the thermoelectric figure of merit (ZT) can be
remarkably enhan... | cond-mat_mes-hall |
Light Induced Aggregation of Specific Single Walled Carbon Nanotubes: We report optically induced aggregation and consequent separation of specific
diameter of pristine single walled carbon nanotubes (SWNT) from stable
solution. Well dispersed solution of pristine SWNTs, without any surfactant or
functionalization, sho... | cond-mat_mes-hall |
Dissipation-driven quantum phase transitions in a Tomonaga-Luttinger
liquid electrostatically coupled to a metallic gate: The dissipation induced by a metallic gate on the low-energy properties of
interacting 1D electron liquids is studied. As function of the distance to the
gate, or the electron density in the wire,... | cond-mat_mes-hall |
Raman Photogalvanic Effect: photocurrent at inelastic light scattering: We show theoretically that electromagnetic waves propagating in the
transparency region of a non-centrosymmetric medium can induce a dc electric
current. The origin of the effect is the Raman scattering of light by free
carriers in the system. Due ... | cond-mat_mes-hall |
Study of intrinsic spin and orbital Hall effects in Pt based on a (6s,
6p, 5d) tight-binding model: We study the origin of the intrinsic spin Hall conductivity (SHC) and the
d-orbital Hall conductivity (OHC) in Pt based on a multiorbital tight-binding
model with spin-orbit interaction. We find that the SHC reaches 10... | cond-mat_mes-hall |
Ultrafast mapping of optical polarization states onto spin coherence of
localized electrons in a semiconductor: We experimentally demonstrate an ultrafast method for preparing spin states
of donor-bound electrons in GaAs with single laser pulses. Each polarization
state of a preparation pulse has a direct mapping ont... | cond-mat_mes-hall |
Modeling ultrafast all-optical switching in synthetic ferrimagnets: Based on numerical simulations, we demonstrate thermally induced magnetic
switching in synthetic ferrimagnets composed of multilayers of rare-earth and
transition metals. Our findings show that deterministic magnetization reversal
occurs above a certai... | cond-mat_mes-hall |
Size Dependence of the Multiple Exciton Generation Rate in CdSe Quantum
Dots: The multiplication rates of hot carriers in CdSe quantum dots are quantified
using an atomistic pseudopotential approach and first order perturbation
theory. Both excited holes and electrons are considered, and electron-hole
Coulomb interac... | cond-mat_mes-hall |
Rectification and nonlinear transport in chaotic dots and rings: We investigate the nonlinear current-voltage characteristic of mesoscopic
conductors and the current generated through rectification of an alternating
external bias. To leading order in applied voltages both the nonlinear and the
rectified current are qua... | cond-mat_mes-hall |
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