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Coulomb-enhanced dynamic localization and Bell state generation in
coupled quantum dots: We investigate the dynamics of two interacting electrons in coupled quantum
dots driven by an AC field. We find that the two electrons can be trapped in
one of the dots by the AC field, in spite of the strong Coulomb repulsion. I... | cond-mat_mes-hall |
Purcell effect at metal-insulator transitions: We investigate the spontaneous emission rate of a two-level quantum emitter
next to a composite medium made of randomly distributed metallic inclusions
embedded in a dielectric host matrix. In the near-field, the Purcell factor can
be enhanced by two-orders of magnitude re... | cond-mat_mes-hall |
Interlayer binding energy of graphite -- A direct experimental
determination: Despite interlayer binding energy is one of the most important material
properties for graphite, there is still lacking report on its direct
experimental determination. In this paper, we present a novel experimental
method to directly measu... | cond-mat_mes-hall |
Observation of collapse of pseudospin order in bilayer quantum Hall
ferromagnets: The Hartree-Fock paradigm of bilayer quantum Hall states with finite
tunneling at filling factor $\nu$=1 has full pseudospin ferromagnetic order
with all the electrons in the lowest symmetric Landau level. Inelastic light
scattering mea... | cond-mat_mes-hall |
Resonant plasmonic effects in periodic graphene antidot arrays: We show that a graphene sheet perforated with micro- or nano-size antidots
have prominent absorption resonances in the microwave and terahertz regions.
These resonances correspond to surface plasmons of a continuous sheet
"perturbed" by a lattice. They are... | cond-mat_mes-hall |
Floquet approach to bichromatically driven cavity optomechanical systems: We develop a Floquet approach to solve time-periodic quantum Langevin
equations in steady state. We show that two-time correlation functions of
system operators can be expanded in a Fourier series and that a generalized
Wiener-Khinchin theorem re... | cond-mat_mes-hall |
A-geometrical approach to Topological Insulators with defects: The study of the propagation of electrons with a varying spinor orientability
is performed using the coordinate transformation method. Topological Insulators
are characterized by an odd number of changes of the orientability in the
Brillouin zone. For defec... | cond-mat_mes-hall |
Dynamics of quantum cellular automata electron transition in triple
quantum dots: The quantum cellular automata (QCA) effect is a transition in which multiple
electron move coordinately by Coulomb interactions and observed in multiple
quantum dots. This effect will be useful for realizing and improving quantum
cellul... | cond-mat_mes-hall |
Microwave Rectification at the Boundary between Two-Dimensional Electron
Systems: Rectification of microwave radiation (20-40 GHz) by a line boundary between
two two-dimensional metals on a silicon surface was observed and investigated
at different temperatures, in-plane magnetic fields and microwave powers. The
rect... | cond-mat_mes-hall |
Quantum electrodynamic approach to the conductivity of gapped graphene: The electrical conductivity of graphene with a nonzero mass-gap parameter is
investigated starting from the first principles of quantum electrodynamics in
(2+1)-dimensional space-time at any temperature. The formalism of the
polarization tensor def... | cond-mat_mes-hall |
Non-invasive detection of charge-rearrangement in a quantum dot in high
magnetic fields: We demonstrate electron redistribution caused by magnetic field on a single
quantum dot measured by means of a quantum point contact as non-invasive
detector. Our device which is fabricated by local anodic oxidation allows to
con... | cond-mat_mes-hall |
Monolithically integrated single quantum dots coupled to bowtie
nanoantennas: Deterministically integrating semiconductor quantum emitters with plasmonic
nano-devices paves the way towards chip-scale integrable, true nanoscale
quantum photonics technologies. For this purpose, stable and bright
semiconductor emitters ... | cond-mat_mes-hall |
Emission and absorption asymmetry in the quantum noise of a Josephson
junction: We measure current fluctuations of mesoscopic devices in the quantum regime,
when the frequency is of the order of or higher than the applied voltage or
temperature. Detection is designed to probe separately the absorption and
emission co... | cond-mat_mes-hall |
Bilayer WSe$_2$ as a natural platform for interlayer exciton condensates
in the strong coupling limit: Exciton condensates (EC) are macroscopic coherent states arising from
condensation of electron-hole pairs. Bilayer heterostructures, consisting of
two-dimensional electron and hole layers separated by a tunnel barri... | cond-mat_mes-hall |
Cavity-enhanced measurements of defect spins in silicon carbide: The identification of new solid-state defect qubit candidates in widely used
semiconductors has the potential to enable the use of nanofabricated devices
for enhanced qubit measurement and control operations. In particular, the
recent discovery of optical... | cond-mat_mes-hall |
Topological Hall signatures of magnetic hopfions: Magnetic hopfions are topologically protected three-dimensional solitons that
are constituted by a tube which exhibits a topologically nontrivial spin
texture in the cross-section profile and is closed to a torus. Here we show
that the hopfion's locally uncompensated em... | cond-mat_mes-hall |
Quasiparticle scattering off phase boundaries in epitaxial graphene: We investigate the electronic structure of terraces of single layer graphene
(SLG) by scanning tunneling microscopy (STM) on samples grown by thermal
decomposition of 6H-SiC(0001) crystals in ultra-high vacuum. We focus on the
perturbations of the loc... | cond-mat_mes-hall |
High-fidelity quantum memory utilizing inhomogeneous nuclear
polarization in a quantum dot: We numerically investigate the encoding and retrieval processes for a quantum
memory realized in a semiconductor quantum dot, by focusing on the effect of
inhomogeneously polarized nuclear spins whose polarization depends on t... | cond-mat_mes-hall |
Photon properties of single graphene nanoribbon microcavity laser: In this work, I propose a scheme about a single graphene nanoribbon (GNR)
emitter in a microcavity, and focus on a fully-quantum-mechanical treatment
model with the excitonic interaction included to investigate the photon
properties and lasing action. W... | cond-mat_mes-hall |
Spatial Confinement, Magnetic Localization and Their Interactions on
Massless Dirac Fermions: It is of keen interest to researchers understanding different approaches to
confine massless Dirac fermions in graphene, which is also a central problem in
making electronic devices based on graphene. Here, we studied spatia... | cond-mat_mes-hall |
Elastic strain field due to an inclusion of a polyhedral shape with a
non-uniform lattice misfit: An analytical solution in a closed form is obtained for the three-dimensional
elastic strain distribution in an unlimited medium containing an inclusion with
a coordinate-dependent lattice mismatch (an eigenstrain). Quan... | cond-mat_mes-hall |
Hot exciton relaxation in coupled ultra-thin CdTe/ZnTe quantum well
structures: The photoluminescence (PL) and PL excitation (PLE) spectra of CdTe/ZnTe
asymmetric double quantum well (QW) structures are studied on a series of
samples containing two CdTe layers with nominal thicknesses of 2 and 4
monolayers (ML) in th... | cond-mat_mes-hall |
Influence of Nuclear Quadrupole Moments on Electron Spin Coherence in
Semiconductor Quantum Dots: We theoretically investigate the influence of the fluctuating Overhauser
field on the spin of an electron confined to a quantum dot (QD). The
fluctuations arise from nuclear angular momentum being exchanged between
diffe... | cond-mat_mes-hall |
Ultrafast Relaxation Dynamics of Photoexcited Dirac Fermion in The Three
Dimensional Dirac Semimetal Cadmium Arsenide: Three dimensional (3D) Dirac semimetals which can be seen as 3D analogues of
graphene have attracted enormous interests in research recently. In order to
apply these ultrahigh-mobility materials in f... | cond-mat_mes-hall |
Carbon Nanotube Thermal Transport: Ballistic to Diffusive: We propose to use l_0/(l_0+L) for the energy transmission covering both
ballistic and diffusive regimes, where l_0 is mean free path and L is system
length. This formula is applied to heat conduction in carbon nanotubes (CNTs).
Calculations of thermal conductio... | cond-mat_mes-hall |
Practical Guide to Quantum Phase Transitions in Quantum-Dot-Based
Tunable Josephson Junctions: Quantum dots attached to BCS superconducting leads exhibit a $0-\pi$ impurity
quantum phase transition, which can be experimentally controlled either by the
gate voltage or by the superconducting phase difference. For the p... | cond-mat_mes-hall |
Giant Magneto-Oscillations of Electric-Field-Induced Spin Polarization
in 2DEG: We consider a disordered two-dimensional electron gas with spin-orbit
coupling placed in a perpendicular magnetic field and calculate the magnitude
and direction of the electric-field-induced spin polarization. We find that in
strong magn... | cond-mat_mes-hall |
Magnetic Response in Mesoscopic Rings and Moebius Strips: A Theoretical
Study: We investigate magnetic response in mesoscopic rings and moebius strips
penetrated by magnetic flux $\phi$. Based on a simple tight-binding framework
all the calculations are performed numerically which describe persistent
current and low-... | cond-mat_mes-hall |
Shot noise in diffusive conductors: A quantitative analysis of
electron-phonon interaction effects: Using the 'drift-diffusion-Langevin' equation, we have quantitatively
analyzed the effects of electron energy relaxation via their interaction with
phonons, generally in presence of electron-electron interaction, on sh... | cond-mat_mes-hall |
Magnetic translations for a spatially periodic magnetic field: It is shown that in the case of free electron in a spatially periodic
magnetic field the concept of magnetic translations operators is still valid
and, moreover, these operators can be defined in the same way as for a Bloch
electron in a uniform magnetic fi... | cond-mat_mes-hall |
PT Symmetric Floquet Topological Phase: In this paper, we study the existence of Floquet topological insulators for
PT symmetric non-Hermitian Hamiltonians. We consider an array of waveguide in
1D with periodically changing non-Hermitian potential and predict the existence
of Floquet topological insulators in the syste... | cond-mat_mes-hall |
Enhanced longevity of the spin helix in low-symmetry quantum wells: In a semiconductor, collective excitations of spin textures usually decay
rather fast due to D'yakonov-Perel' spin relaxation. The latter arises from
spin-orbit coupling, which induces wave-vector-dependent spin rotations that,
in conjunction with rand... | cond-mat_mes-hall |
Optimized Tersoff and Brenner empirical potential parameters for lattice
dynamics and phonon thermal transport in carbon nanotubes and graphene: We have examined the commonly used Tersoff and Brenner empirical interatomic
potentials in the context of the phonon dispersions in graphene. We have found
a parameter set f... | cond-mat_mes-hall |
Magnetic Splitting of the Zero Bias Peak in a Quantum Point Contact with
a Variable Aspect Ratio: We report a zero-bias peak in the differential conductance of a Quantum Point
Contact (QPC), which splits in an external magnetic field. The peak is observed
over a range of device conductance values starting significant... | cond-mat_mes-hall |
Transport Study of Charge Carrier Scattering in Monolayer WSe$_2$: Employing flux-grown single crystal WSe$_2$, we report charge carrier
scattering behaviors measured in $h$-BN encapsulated monolayer field effect
transistors. We perform quantum transport measurements across various hole
densities and temperatures and o... | cond-mat_mes-hall |
Magnetically induced oscillations of the spin polarization in the
Datta-Das geometry: The control of intrinsic magnetic degrees of freedom is very important as it
offers a practical means to manipulate and probe electron spin transport.
Tunable spin-orbit effect in quantum wires can in principle serve as a means to
a... | cond-mat_mes-hall |
Vacancy-induced localized modes and impurity band formation in the
Haldane model: a quantum dot analogy: In this study, the Haldane model's edge states are utilized to illustrate
that a zero-energy localized state forms around a single vacancy in the model.
In order to complete this task, the conventional unit cell a... | cond-mat_mes-hall |
Cryogenic spin Seebeck effect: We present a theory of the non-linearities of the spin Seebeck effect (SSE)
in a ferromagnetic nanowire at cryogenic temperatures. We adopt a microscopic
quantum noise model based on a collection of two-level systems. At certain
positions of Pt detectors to the wire, the transverse SSE ch... | cond-mat_mes-hall |
Tunable ferroelectricity in hBN intercalated twisted double-layer
graphene: Van der Waals (vdW) assembly of two-dimensional materials has been long
recognized as a powerful tool to create unique systems with properties that
cannot be found in natural compounds. However, among the variety of vdW
heterostructures and t... | cond-mat_mes-hall |
On the Implications of Discrete Symmetries for the Beta Function of
Quantum Hall Systems: We argue that the large discrete symmetry group of quantum Hall systems is
insufficient in itself to determine the complete beta function for the scaling
of the conductivities, $\sigma_{xx}$ and $\sigma_{xy}$. We illustrate this... | cond-mat_mes-hall |
Large quantum nonlinear dynamic susceptibility of single-molecule
magnets: The nonlinear dynamical response of Mn$_{12}$ single-molecule magnets is
experimentally found to be very large, quite insensitive to the spin-lattice
coupling constant, and displaying peaks reversed with respect to classical
superparamagnets. ... | cond-mat_mes-hall |
The electronic properties of doped single walled carbon nanotubes and
carbon nanotube sensors: We present ab initio calculations on the band structure and density of states
of single wall semiconducting carbon nanotubes with high degrees (up to 25%) of
B, Si and N substitution. The doping process consists of two phas... | cond-mat_mes-hall |
Trigonal distortion of topologically confined channels in bilayer
Graphene: In this work we show that the trigonal warping of the electronic bands in
bilayer graphene dramatically modifies the behavior of the one-dimensional
modes topologically confined due to an inhomogeneous bias that changes sign
across a channel.... | cond-mat_mes-hall |
Oligothiophene nano-rings as electron resonators for whispering gallery
modes: Structural and electronic properties of oligothiophene nano-wires and rings
synthesized on a Au(111) surface are investigated by scanning tunneling
microscopy. The spectroscopic data of the linear and cyclic oligomers show
remarkable diffe... | cond-mat_mes-hall |
Dynamical separation of bulk and edge transport in HgTe-based 2D
topological insulators: Topological effects in edge states are clearly visible on short lengths only,
thus largely impeding their studies. On larger distances, one may be able to
dynamically enhance topological signatures by exploiting the high mobility... | cond-mat_mes-hall |
Magneto-elastic universal logic gate: A non-volatile, error-resilient
Boolean logic gate with ultra-low energy-delay product: A long-standing goal of computer technology is to process and store digital
information with the same device in order to implement new architectures. One
way to accomplish this is to use nanom... | cond-mat_mes-hall |
Superfluidity of Dipolar Excitons in a Black Phosphorene Double Layer: We study the formation of dipolar excitons and their superfluidity in a black
phosphorene double layer. The analytical expressions for the single dipolar
exciton energy spectrum and wave function are obtained. It is predicted that a
weakly interacti... | cond-mat_mes-hall |
Optical generation and detection of pure valley current in monolayer
transition metal dichalcogenides: We propose a practical scheme to generate a pure valley current in monolayer
transition metal dichalcogenides by one-photon absorption of linearly polarized
light. We show that the pure valley current can be detecte... | cond-mat_mes-hall |
Quantum oscillations observed in graphene at microwave frequencies: We have measured the microwave conductance of mechanically exfoliated
graphene at frequencies up to 8.5 GHz. The conductance at 4.2 K exhibits
quantum oscillations, and is independent of the frequency. | cond-mat_mes-hall |
Time Reversal Invariant Topologically Insulating Circuits: From studies of exotic quantum many-body phenomena to applications in
spintronics and quantum information processing, topological materials are
poised to revolutionize the condensed matter frontier and the landscape of
modern materials science. Accordingly, the... | cond-mat_mes-hall |
Domain wall motion at low current density in a synthetic antiferromagnet
nanowire: The current-driven motion of magnetic domain walls (DWs) is the working
principle of magnetic racetrack memories. In this type of spintronic
technology, high current densities are used to propel DW motion in magnetic
nanowires, causing... | cond-mat_mes-hall |
Persistent current of correlated electrons in mesoscopic ring with
impurity: The persistent current of correlated electrons in a continuous
one-dimensional ring with a single scatterer is calculated by solving the
many-body Schrodinger equation for several tens of electrons interacting via
the electron-electron (e-e)... | cond-mat_mes-hall |
Current-induced forces in mesoscopic systems: a scattering matrix
approach: Nanoelectromechanical systems are characterized by an intimate connection
between electronic and mechanical degrees of freedom. Due to the nanoscopic
scale, current flowing through the system noticeably impacts the vibrational
dynamics of the... | cond-mat_mes-hall |
Microwave Experiments Simulating Quantum Search and Directed Transport
in Artificial Graphene: A series of quantum search algorithms have been proposed recently providing
an algebraic speedup compared to classical search algorithms from $N$ to
$\sqrt{N}$, where $N$ is the number of items in the search space. In
parti... | cond-mat_mes-hall |
In-plane gate single-electron transistor in Ga[Al]As fabricated by
scanning probe lithography: A single-electron transistor has been realized in a Ga[Al]As heterostructure
by oxidizing lines in the GaAs cap layer with an atomic force microscope. The
oxide lines define the boundaries of the quantum dot, the in-plane g... | cond-mat_mes-hall |
Plasmons in realistic graphene/hexagonal boron nitride moiré patterns: Van der Waals heterostructures employing graphene and hexagonal boron nitride
(hBN) crystals have emerged as a promising platform for plasmonics thanks to
the tunability of their collective modes with carrier density and record values
for plasmonics... | cond-mat_mes-hall |
Non-equilibrium fractional quantum Hall states visualized by optically
detected MRI: Using photoluminescence microscopy enhanced by MRI, we visualize in real
space both electron and nuclear polarization occurring in non-equilibrium FQH
liquids. We observe stripe-like regions comprising FQH excited states which
discre... | cond-mat_mes-hall |
Directional emission of a deterministically fabricated quantum dot -
Bragg reflection multi-mode waveguide system: We report on the experimental study and numerical analysis of chiral
light-matter coupling in deterministically fabricated quantum dot (QD)
waveguide structures. We apply in-situ electron beam lithograph... | cond-mat_mes-hall |
Strong parametric coupling between two ultra-coherent membrane modes: We demonstrate parametric coupling between two modes of a silicon nitride
membrane. We achieve the coupling by applying an oscillating voltage to a sharp
metal tip that approaches the membrane surface to within a few 100 nm. When the
voltage oscillat... | cond-mat_mes-hall |
Room-temperature coherent optical manipulation of single-hole spins in
solution-grown perovskite quantum dots: Manipulation of solid-state spin coherence is an important paradigm for
quantum information processing. Current systems either operate at very low
temperatures or are difficult to scale-up. Developing low-co... | cond-mat_mes-hall |
Micromagnetic Simulation of Amorphous Ferrimagnetic TbFeCo Films with
Exchange Coupled Nanophases: Amorphous ferrimagnetic TbFeCo thin films are found to exhibit exchange bias
effect near the compensation temperature by magnetic hysteresis loop
measurement. The observed exchange anisotropy is believed to originate fr... | cond-mat_mes-hall |
Photogalvanic effect in Weyl semimetals: We theoretically study the impact of impurities on the photogalvanic effect
(PGE) in Weyl semimetals with weakly tilted Weyl cones. Our calculations are
based on a two-nodes model with an inversion symmetry breaking offset and we
employ a kinetic equation approach in which both ... | cond-mat_mes-hall |
Topological Hofstadter Insulators in a Two-Dimensional Quasicrystal: We investigate the properties of a two-dimensional quasicrystal in the
presence of a uniform magnetic field. In this configuration, the density of
states (DOS) displays a Hofstadter butterfly-like structure when it is
represented as a function of the ... | cond-mat_mes-hall |
True amplification of spin waves in magnonic nano-waveguides: Magnonic nano-devices exploit magnons -- quanta of spin waves -- to transmit
and process information within a single integrated platform that has the
potential to outperform traditional semiconductor-based electronics for low
power applications. The main mis... | cond-mat_mes-hall |
Pair-wise decoherence in coupled spin qubit networks: Experiments involving phase coherent dynamics of networks of spins, such as
echo experiments, will only work if decoherence can be suppressed. We show
here, by analyzing the particular example of a crystalline network of Fe8
molecules, that most decoherence typicall... | cond-mat_mes-hall |
Hot electrons in a tunnel structure based on metal nanoclusters: We study the effect of temperature on the tunnel current in a structure based
on gold clusters taking into consideration their discrete electronic spectra.
We suggest that an overheating of electron subsystem leads to the disappearance
of a current gap an... | cond-mat_mes-hall |
Kondo Effect in a Many-Electron Quantum Ring: The Kondo effect is investigated in a many-electron quantum ring as a
function of magnetic field. For fields applied perpendicular to the plane of
the ring a modulation of the Kondo effect with the Aharonov-Bohm period is
observed. This effect is discussed in terms of the e... | cond-mat_mes-hall |
Spin-Hall Effect in A Symmetric Quantum Wells by A Random Rashba Field: Changes dopant ion concentrations in the sides of a symmetric quantum well
are known to create a random Rashba-type spin-orbit coupling. Here we
demonstrate that, as a consequence, a finite size spin-Hall effect is also
present. Our numerical algor... | cond-mat_mes-hall |
Coulomb drag in graphene near the Dirac point: We study Coulomb drag in double-layer graphene near the Dirac point. A
particular emphasis is put on the case of clean graphene, with transport
properties dominated by the electron-electron interaction. Using the quantum
kinetic equation framework, we show that the drag be... | cond-mat_mes-hall |
Hot electron cooling by acoustic phonons in graphene: We have investigated the energy loss of hot electrons in metallic graphene by
means of GHz noise thermometry at liquid helium temperature. We observe the
electronic temperature T / V at low bias in agreement with the heat diffusion
to the leads described by the Wied... | cond-mat_mes-hall |
Micromagnetic view on ultrafast magnon generation by femtosecond spin
current pulses: In this Article we discuss a micromagnetic modelling approach to describe the
ultrafast spin-transfer torque excitation of coherent and incoherent magnons on
the nanoscale. Implementing the action of a femtosecond spin current pulse... | cond-mat_mes-hall |
"Smoking gun" signatures of topological milestones in trivial materials
by measurement fine-tuning and data postselection: Exploring the topology of electronic bands is a way to realize new states of
matter with possible implications for information technology. Because bands
cannot always be observed directly, a cent... | cond-mat_mes-hall |
Liquid exfoliation of solvent-stabilised black phosphorus: applications
beyond electronics: Few layer black phosphorus is a new two-dimensional material which is of
great interest for applications, mainly in electronics. However, its lack of
stability severely limits our ability to synthesise and process this materia... | cond-mat_mes-hall |
Diffusion of photo-excited holes in viscous electron fluid: The diffusion of photo-generated holes is studied in a high-mobility
mesoscopic GaAs\ channel where electrons exhibit hydrodynamic properties. It is
shown that the injection of holes into such an electron system leads to the
formation of a hydrodynamic three-c... | cond-mat_mes-hall |
Temperature effect in the conductance of hydrogen molecule: We present a many-body calculation for the conductance of a conducting bridge
of a simple hydrogen molecule between $Pt$ electrodes.The experimental results
showed that the conductance $G=dI/dV$ has the maximum value near the quantum
unit $G_{0}=2e^{2}/h$.
T... | cond-mat_mes-hall |
Current and Shot Noise in a Quantum Dot Coupled to Ferromagnetic Leads
in the Large U Limit: Using the Keldysh nonequilibrium Green function technique, we study the
current and shot noise spectroscopy of a single interacting quantum dot coupled
to two ferromagnetic leads with different polarizations. The polarization... | cond-mat_mes-hall |
Electron spin resonance on a 2-dimensional electron gas in a single AlAs
quantum well: Direct electron spin resonance (ESR) on a high mobility two dimensional
electron gas in a single AlAs quantum well reveals an electronic $g$-factor of
1.991 at 9.35 GHz and 1.989 at 34 GHz with a minimum linewidth of 7 Gauss. The
E... | cond-mat_mes-hall |
Near-Field Radiative Heat Transfer between Drift-biased Graphene through
Nonreciprocal Surface Plasmons: In this Rapid Communication, we theoretically demonstrate that near-field
radiative heat transfer (NFRHT) can be modulated and enhanced by a new energy
transmission mode of evanescent wave, i.e. the nonreciprocal ... | cond-mat_mes-hall |
What do noise measurements reveal about fractional charge in FQH
liquids?: We present a calculation of noise in the tunneling current through junctions
between two two-dimensional electron gases (2DEG) in inequivalent Laughlin
fractional quantum Hall (FQH) states, as a function of voltage and temperature.
We discuss ... | cond-mat_mes-hall |
Sub-to-super-Poissonian photon statistics in cathodoluminescence of
color center ensembles in isolated diamond crystals: Impurity-vacancy centers in diamond offer a new class of robust photon
sources with versatile quantum properties. While individual color centers
commonly act as single-photon sources, their ensembl... | cond-mat_mes-hall |
Field-induced dissociation of two-dimensional excitons in
transition-metal dichalcogenides: Generation of photocurrents in semiconducting materials requires dissociation
of excitons into free charge carriers. While thermal agitation is sufficient to
induce dissociation in most bulk materials, an additional push is re... | cond-mat_mes-hall |
Non-stationary effects in the coupled quantum dots influenced by the
electron-phonon interaction: We analyzed time evolution of the localized charge in the system of two
interacting single level quantum dots (QDs) coupled with the continuous
spectrum states in the presence of electron-phonon interaction.
We demonst... | cond-mat_mes-hall |
Finite-size scaling effect on Néel temperature of antiferromagnetic
Cr$_2$O$_3$-(0001) films in an exchange-coupled heterostructure: The scaling of antiferromagnetic ordering temperature of corundum-type
chromia films have been investigated. N\'eel temperature $T_N$ was determined
from the effect of perpendicular exc... | cond-mat_mes-hall |
Spin-orbit fields in asymmetric (001) quantum wells: We measure simultaneously the in-plane electron g-factor and spin relaxation
rate in a series of undoped inversion-asymmetric (001)-oriented GaAs/AlGaAs
quantum wells by spin-quantum beat spectroscopy. In combination the two
quantities reveal the absolute values of b... | cond-mat_mes-hall |
Dirac-point engineering and topological phase transitions in honeycomb
optical lattices: We study the electronic structure and the phase diagram of non-interacting
fermions confined to hexagonal optical lattices. In the first part, we compare
the properties of Dirac points arising in the eigenspectrum of either honey... | cond-mat_mes-hall |
Shot noise of series quantum point contacts intercalating chaotic
cavities: Shot noise of series quantum point contacts forming a sequence of cavities in
a two dimensional electron gas are studied theoretically and experimentally.
Noise in such a structure originates from local scattering at the point
contacts as wel... | cond-mat_mes-hall |
Giga-Hertz quantized charge pumping in bottom gate defined InAs nanowire
quantum dots: Semiconducting nanowires (NWs) are a versatile, highly tunable material
platform at the heart of many new developments in nanoscale and quantum
physics. Here, we demonstrate charge pumping, i.e., the controlled transport of
individ... | cond-mat_mes-hall |
Analytical description of the 1s exciton linewidth
temperature-dependence in transition metal dichalcogenides: We obtain an analytical expression for the linewidth of the 1s-exciton as a
function of temperature in transition metal dichalcogenides. The total
linewidth, as function of temperature, is dominated by three... | cond-mat_mes-hall |
Topological Number of Edge States: We show that the edge states of the four-dimensional class A system can have
topological charges, which are characterized by Abelian/non-Abelian monopoles.
The edge topological charges are a new feature of relations among theories with
different dimensions. From this novel viewpoint, ... | cond-mat_mes-hall |
Controllable Spin-Transfer Torque on an Antiferromagnet in a Dual
Spin-Valve: We consider current-induced spin-transfer torque on an antiferromagnet in a
dual spin-valve setup. It is demonstrated that a net magnetization may be
induced in the AFM by partially or completely aligning the sublattice
magnetizations via a... | cond-mat_mes-hall |
Signatures of spin-orbit coupling in scanning gate conductance images of
electron flow from quantum point contacts: Electron flow through a quantum point contact in presence of spin-orbit
coupling is investigated theoretically in the context of the scanning gate
microscopy (SGM) conductance mapping. Although in the a... | cond-mat_mes-hall |
Probing the potential landscape inside a two-dimensional electron-gas: We report direct observations of the scattering potentials in a
two-dimensional electron-gas using electron-beam diffaction-experiments. The
diffracting objects are local density-fluctuations caused by the spatial and
charge-state distribution of th... | cond-mat_mes-hall |
Mechanism for self-formation of periodic structures on a plastic polymer
surface using a nanosecond and femtosecond laser pulses: The high UV laser dose at 193 nm induces grooves on poly allyl diglycol
carbonate PADC (CR39) at normal irradiation. The spatial period exhibits to be
nearly invariant for azimuth and pola... | cond-mat_mes-hall |
Control of Plasmons in Topological Insulators via Local Perturbations: We use a fully quantum mechanical approach to demonstrate control of
plasmonic excitations in prototype models of topological insulators by
molecule-scale perturbations. Strongly localized surface plasmons are present
in the host systems, arising fr... | cond-mat_mes-hall |
One-Dimensional Luttinger Liquids in a Two-Dimensional Moiré Lattice: The Luttinger liquid (LL) model of one-dimensional (1D) electronic systems
provides a powerful tool for understanding strongly correlated physics
including phenomena such as spin-charge separation. Substantial theoretical
efforts have attempted to ex... | cond-mat_mes-hall |
Anomalous Nernst effect and field-induced Lifshitz transition in Weyl
semimetals TaP and TaAs: The discovery of Weyl fermions in transition metal monoarsenides/phosphides
without inversion symmetry represents an exceptional breakthrough in modern
condensed matter physics. However, exploring the inherent nature of the... | cond-mat_mes-hall |
Tunnel magnetoresistance and temperature related effects in magnetic
tunnel junctions with embedded nanoparticles: Temperature dependence of the tunnel magnetoresistance (TMR) was calculated
in range of the quantum-ballistic model in the magnetic tunnel junctions (MTJs)
with embedded nanoparticles (NPs). The electron... | cond-mat_mes-hall |
Compensation of the Kondo effect in quantum dots coupled to
ferromagnetic leads within equation of motion approach: We propose a new approximation scheme within equation of motion approach
(EOM) to spin polarized transport through a quantum dot coupled to
ferromagnetic leads. It has some advantages over a widely used... | cond-mat_mes-hall |
Semiconductor quantum well irradiated by a two-mode electromagnetic
field as a terahertz emitter: We study theoretically the nonlinear optical properties of a semiconductor
quantum well (QW) irradiated by a two-mode electromagnetic wave consisting of a
strong resonant dressing field and a weak off-resonant driving fi... | cond-mat_mes-hall |
Mapping Spin Interactions from Conductance Peak Splitting in Coulomb
Blockade: We investigate the transport properties of a quantum dot coupled to leads
interacting with a multi-spin system using the generalized master equation
within the Coulomb blockade regime. We find that if two states for each
scattering region ... | cond-mat_mes-hall |
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