publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2019-07-31 | Resonant photoproduction of high-energy electron-positron pairs in the field of a nucleus and a plane electromagnetic wave | The resonant photoproduction of ultrarelativistic electron-positron pairs
(PPP) in a nuclear field and a weak laser field is theoretically studied. Under
resonance conditions, the intermediate virtual electron (positron) in the laser
field becomes a real particle. As a result, the initial process of the second
order in... | 1907.13560v1 |
2020-12-15 | Shifting and splitting of resonance lines due to dynamical friction in plasmas | A quasilinear plasma transport theory that incorporates Fokker-Planck
dynamical friction (drag) and pitch angle scattering is self-consistently
derived from first principles for an isolated, marginally-unstable mode
resonating with an energetic minority species. It is found that drag
fundamentally changes the structure... | 2012.08661v2 |
2021-01-29 | Electrokinetic oscillatory flow and energy conversion of viscoelastic fluids in microchannels: a linear analysis | We study the electrokinetic flow of viscoelastic fluids subjected to an
oscillatory pressure gradient, and particularly focus on the resonance
behaviors in the flow. The governing equations are restricted to linear regime
so that the velocity and streaming potential fields can be solved analytically.
Based on the inter... | 2101.12517v1 |
2021-03-10 | Assessing the impact of transient orbital resonances | One of the primary sources for the future space-based gravitational wave
detector, the Laser Interferometer Space Antenna, are the inspirals of small
compact objects into massive black holes in the centres of galaxies. The
gravitational waveforms from such Extreme Mass Ratio Inspiral (EMRI) systems
will provide measure... | 2103.06306v2 |
2021-07-18 | Widening, Transition and Coalescence of Local Resonance Band Gaps in Multi-resonator Acoustic Metamaterials: From Unit Cells to Finite Chains | Local resonance band gaps in acoustic metamaterials are widely known for
their strong attenuation yet narrow frequency span. The latter limits the
practical ability to implement subwavelength band gaps for broadband
attenuation and has motivated novel metamaterial designs in recent years. In
this paper, we investigate ... | 2107.08431v4 |
2022-03-24 | The gravitational imprint of an interior-orbital resonance in Jupiter-Io | At mid-mission perijove 17, NASA's Juno mission has revealed a $7\sigma$
discrepancy between Jupiter's observed high-degree tidal response and the
theoretical equilibrium tidal response, namely the Love number $k_{42}$. Here,
we propose an interpretation for this puzzling disagreement based on an
interior-orbital reson... | 2203.13175v1 |
2000-03-28 | Quantum Tunneling and Quantum-Classical Transitions in Large Spin Systems | We have studied quantum tunneling of large spins in a biaxial spin system and
in a single-axial spin system with a transverse magnetic field. The
asymptotically exact eigenvalues and eigenstates of the spin systems are
obtained by solving the Mathieu equation. When the height $4q$ of energy
barrier formed by the anisot... | 0003440v1 |
2002-06-07 | Spin-chirality duality in a spin ladder with four-spin cyclic exchange | Effect of four-spin cyclic exchange on magnetism is studied in the two-leg
S=1/2 ladder. We develop an exact spin-chirality duality transformation, under
which the system is self-dual when the four-spin exchange J_4 is half of the
two-spin exchange. Using the density-matrix renormalization-group method and
the duality ... | 0206102v2 |
2003-08-25 | Initialization of a nuclear spin system over the quantum Hall regime for quantum information processing | The application of the quantum mechanical properties of physical systems to
realize novel computational schemes and innovative device functions have been
topics of recent interest. Proposals for associated devices are to be found in
diverse branches of physics. Here, we are concerned with the experimental
realization o... | 0308501v1 |
2004-01-29 | Rashba spin-orbit coupling and spin relaxation in silicon quantum wells | Silicon is a leading candidate material for spin-based devices, and
two-dimensional electron gases (2DEGs) formed in silicon heterostructures have
been proposed for both spin transport and quantum dot quantum computing
applications. The key parameter for these applications is the spin relaxation
time. Here we apply the... | 0401615v2 |
2004-04-03 | Pumped spin-current and shot noise spectra in a single quantum dot | We exploit the pumped spin-current and current noise spectra under
equilibrium condition in a single quantum dot connected to two normal leads, as
an electrical scheme for detection of the electron spin resonance (ESR) and
decoherence. We propose spin-resolved quantum rate equations with correlation
functions in Laplac... | 0404064v3 |
2004-09-08 | Spin-dependent Andreev reflection tunneling through a quantum dot with intradot spin-flip scattering | We study Andreev reflection (AR) tunneling through a quantum dot (QD)
connected to a ferromagnet and a superconductor, in which the intradot
spin-flip interaction is included. By using the nonequibrium-Green-function
method, the formula of the linear AR conductance is derived at zero
temperature. It is found that compe... | 0409180v1 |
2004-09-13 | DC Spin Current Generation in a Rashba-type Quantum Channel | We propose and demonstrate theoretically that resonant inelastic scattering
(RIS) can play an important role in dc spin current generation. The RIS makes
it possible to generate dc spin current via a simple gate configuration: a
single finger-gate that locates atop and orients transversely to a quantum
channel in the p... | 0409291v3 |
2005-12-15 | Enhancement of electron spin coherence by optical preparation of nuclear spins | We study a large ensemble of nuclear spins interacting with a single electron
spin in a quantum dot under optical excitation and photon detection. When a
pair of applied laser fields satisfy two-photon resonance between the two
ground electronic spin states, detection of light scattering from the
intermediate exciton s... | 0512362v1 |
2001-06-18 | Algorithmic Cooling and Scalable NMR Quantum Computers | We present here algorithmic cooling (via polarization-heat-bath)- a powerful
method for obtaining a large number of highly polarized spins in liquid
nuclear-spin systems at finite temperature. Given that spin-half states
represent (quantum) bits, algorithmic cooling cleans dirty bits beyond the
Shannon's bound on data ... | 0106093v1 |
2006-05-20 | Polarization and readout of coupled single spins in diamond | We study the coupling of a single nitrogen-vacancy center in diamond to a
nearby single nitrogen defect at room temperature. The magnetic dipolar
coupling leads to a splitting in the electron spin resonance frequency of the
nitrogen-vacancy center, allowing readout of the state of a single nitrogen
electron spin. At ma... | 0605179v2 |
2007-07-31 | Coherent spin rotations in open driven double quantum dots | We analyze the charge and spin dynamics in a DC biased double quantum dot
driven by crossed DC and AC magnetic fields. In this configuration, spatial
delocalization due to inter-dot tunnel competes with intra-dot spin rotations
induced by the time dependent magnetic field, giving rise to a complicated time
dependent be... | 0707.4636v2 |
2008-04-28 | Coherent spin relaxation in molecular magnets | Numerical modelling of coherent spin relaxation in nanomagnets, formed by
magnetic molecules of high spins, is accomplished. Such a coherent spin
dynamics can be realized in the presence of a resonant electric circuit coupled
to the magnet. Computer simulations for a system of a large number of
interacting spins is an ... | 0804.4368v1 |
2008-10-07 | Coherent Manipulation and Decoherence of S=10 Single-Molecule Magnets | We report coherent manipulation of S=10 Fe$_{8}$ single-molecule magnets. The
temperature dependence of the spin decoherence time $T_2$ measured by high
frequency pulsed electron paramagnetic resonance indicates that strong spin
decoherence is dominated by Fe$_{8}$ spin bath fluctuations. By polarizing the
spin bath in... | 0810.1254v1 |
2008-11-03 | Collective spin dynamics in magnetic nanomaterials | Magnetic nanomaterials are considered, formed by magnetic nanomolecules with
high spins. The problem of spin reversal in these materials is analyzed, which
is of interest for the possible use of such materials for quantum information
processing and quantum computing. The fastest spin reversal can be achieved by
couplin... | 0811.0267v1 |
2009-05-13 | Spin-dependent dipole excitation in alkali-metal nanoparticles | We study the spin-dependent electronic excitations in alkali-metal
nanoparticles. Using numerical and analytical approaches, we focus on the
resonances in the response to spin-dependent dipole fields. In the spin-dipole
absorption spectrum for closed-shell systems, we investigate in detail the
lowest-energy excitation,... | 0905.2076v1 |
2009-06-22 | Theory of the spin relaxation of conduction electrons in silicon | A realistic pseudopotential model is introduced to investigate the
phonon-induced spin relaxation of conduction electrons in bulk silicon. We find
a surprisingly subtle interference of the Elliott and Yafet processes affecting
the spin relaxation over a wide temperature range, suppressing the significance
of the intrav... | 0906.4054v4 |
2009-06-26 | Nonlinear Spin-Charge Dynamics in a Driven Double Quantum Dot | The coupled nonlinear coordinate and spin dynamics of an electron in a double
quantum dot with spin-orbit interaction is studied semiclassically. The system
is driven by an electric field with the frequency matching the orbital or the
Zeeman resonance in magnetic field. Calculated evolution of the spin state is
crucial... | 0906.4854v1 |
2009-08-31 | Hyperfine Interactions and Spin Transport in Ferromagnet-Semiconductor Heterostructures | Measurements and modeling of electron spin transport and dynamics are used to
characterize hyperfine interactions in Fe/GaAs devices with $n$-GaAs channels.
Ga and As nuclei are polarized by electrically injected electron spins, and the
nuclear polarization is detected indirectly through the depolarization of
electron ... | 0909.0048v1 |
2010-04-16 | Proposal of a full Bell state analyzer for spin qubits in a double quantum dot | We propose a scheme for full Bell state measurement of spin qubits in a
double quantum dot. Our scheme consists of Pauli spin-blockade measurements and
biaxial electron-spin resonance. In order to eliminate the average of the
Zeeman fields, the double quantum dot is designed so that the Land\'e g-factors
of first and s... | 1004.2758v1 |
2010-05-10 | Anisotropy of Magnetic Interactions in the Spin-Ladder Compound (C$_5$H$_{12}$N)$_2$CuBr$_4$ | Magnetic excitations in the spin-ladder material (C$_5$H$_{12}$N)$_2$CuBr$_4$
[BPCB] are probed by high-resolution multi-frequency electron spin resonance
(ESR) spectroscopy. Our experiments provide a direct evidence for a biaxial
anisotropy ($\sim 5\%$ of the dominant exchange interaction), that is in
contrast to a fu... | 1005.1474v1 |
2010-05-14 | Perfect state transfers by selective quantum interferences within complex spin networks | We present a method that implement directional, perfect state transfers
within a branched spin network by exploiting quantum interferences in the
time-domain. That provides a tool to isolate subsystems from a large and
complex one. Directionality is achieved by interrupting the spin-spin coupled
evolution with periods ... | 1005.2593v1 |
2010-06-20 | Inter-layer spin diffusion and electric conductivity in the organic conductors κ-ET2-Cl and κ-ET2-Br | A high frequency (111.2-420 GHz) electron spin resonance study of the
inter-layer (perpendicular) spin diffusion as a function of pressure and
temperature is presented in the conducting phases of the layered organic
compounds, {\kappa}-(BEDT-TTF)2-Cu[N(CN)2]X ({\kappa}-ET2-X), X=Cl or Br. The
resolved ESR lines of adja... | 1006.3939v1 |
2010-07-26 | Fractional spin textures in the frustrated magnet SrCr$_{9p}$Ga$_{12-9p}$O$_{19}$ | We consider the archetypal frustrated antiferromagnet
SrCr$_{9p}$Ga$_{12-9p}$O$_{19}$ in its well-known spin-liquid state, and
demonstrate that a Cr$^{3+}$ spin $S=3/2$ ion in direct proximity to a pair of
vacancies (in disordered $p<1$ samples) is cloaked by a spatially extended spin
texture that encodes the correlati... | 1007.4507v1 |
2010-08-24 | Low temperature electron-spin relaxation in the crystalline and glassy states of solid ethanol | X-band electron paramagnetic resonance (EPR) spectroscopy was used to study
the spectral properties of a nitroxide spin probe in ethanol glass and
crystalline ethanol, at 5 - 11.5 K. The different anisotropy of molecular
packing in the two host matrices was evidenced by different rigid limit values
for maximal hyperfin... | 1008.4032v1 |
2011-05-25 | Spin Relaxation Times of Single-Wall Carbon Nanotubes | We have measured temperature ($T$)- and power-dependent electron spin
resonance in bulk single-wall carbon nanotubes to determine both the
spin-lattice and spin-spin relaxation times, $T_1$ and $T_2$. We observe that
$T_1^{-1}$ increases linearly with $T$ from 4 to 100 K, whereas $T_2^{-1}$ {\em
decreases} by over a fa... | 1105.5095v3 |
2011-11-22 | Spatial Analogue of Quantum Spin Dynamics via Spin-Orbit Interaction | We map electron spin dynamics from time to space in quantum wires with
spatially uniform and oscillating Rashba spin-orbit coupling. The presence of
the spin-orbit interaction introduces pseudo-Zeeman couplings of the electron
spins to effective magnetic fields. We show that by periodically modulating the
spin-orbit co... | 1111.5311v1 |
2011-11-30 | Theory of the ac spin-valve effect | The spin-valve complex magnetoimpedance of symmetric ferromagnet/normal
metal/ferromagnet junctions is investigated within the drift-diffusion
(standard) model of spin injection. The ac magnetoresistance---the real part
difference of the impedances of the parallel and antiparallel magnetization
configurations---exhibit... | 1111.7244v1 |
2011-12-12 | Spin-blockade effect and coherent control of DNA-damage by free radicals: a proposal on bio-spintronics | Coherent control of OH-free radicals interacting with the spin-triplet state
of a DNA molecule is investigated. A model Hamiltonian for molecular spin
singlet-triplet resonance is developed. We illustrate that the spin-triplet
state in DNA molecules can be efficiently populated, as the spin-injection rate
can be tuned ... | 1112.2733v1 |
2012-02-28 | Spin-chain system as a tunable simulator of frustrated planar magnetism | At low temperatures, weakly coupled spin chains develop a magnetic order that
reflects the character of gapless spin fluctuations along the chains. Using
nuclear magnetic resonance, we identify and characterize two ordered states in
the gapless region of the antiferromagnetic, Ising-like spin-chain system
BaCo2V2O8, bo... | 1202.6374v1 |
2012-05-30 | Circuit Quantum Electrodynamics with a Spin Qubit | Circuit quantum electrodynamics allows spatially separated superconducting
qubits to interact via a "quantum bus", enabling two-qubit entanglement and the
implementation of simple quantum algorithms. We combine the circuit quantum
electrodynamics architecture with spin qubits by coupling an InAs nanowire
double quantum... | 1205.6767v1 |
2013-03-16 | 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 multilayers is
associated with electrical polarization. Here, we show that TMDC bilayers offer
an unprecedented... | 1303.3932v1 |
2013-04-17 | A dual-isotope rubidium comagnetometer to search for anomalous long-range spin-mass (spin-gravity) couplings of the proton | The experimental concept of a search for a long-range coupling between
rubidium (Rb) nuclear spins and the mass of the Earth is described. The
experiment is based on simultaneous measurement of the spin precession
frequencies for overlapping ensembles of Rb-85 and Rb-87 atoms contained within
an evacuated, antirelaxati... | 1304.4660v1 |
2013-05-07 | High-Resolution Correlation Spectroscopy of 13C Spins Near a Nitrogen-Vacancy Center in Diamond | Spin complexes comprising the nitrogen-vacancy (NV) center and neighboring
spins are being considered as a building block for a new generation of
spintronic and quantum information processing devices. Because assembling
identical spin clusters is difficult, new strategies are in order to determine
individual node struc... | 1305.1536v1 |
2013-05-28 | Spin fluctuations with two-dimensional XY behavior in a frustrated S = 1/2 square-lattice ferromagnet | The spin dynamics of the layered square-lattice vanadate Pb2VO(PO4)2 is
investigated by electron spin resonance at various magnetic fields and at
temperatures above magnetic ordering. The linewidth divergence towards low
temperatures seems to agree with isotropic Heisenberg-type spin exchange
suggesting that the spin r... | 1305.6518v1 |
2013-06-27 | High temperature collective spin-photon coupling in a microwave cavity | An ensemble of N identical noninteracting spins being in thermal equilibrium
and coupled to the resonant mode of a lossless microwave cavity is studied at
arbitrary temperature T. Near T = 0 the system is known to be in a coupled
spin-photon state that manifests itself by the splitting of the cavity mode
(vacuum Rabi s... | 1306.6425v1 |
2013-10-22 | Control of Majorana Edge Modes by a g-factor Engineered Nanowire Spin Transistor | We propose the manipulation of Majorana edge states via hybridization and
spin currents in a nanowire spin transistor. The spin transistor is based on a
heterostructure nanowire comprising of semiconductors with large and small
g-factors that form the topological and non-topological regions respectively.
The hybridizat... | 1310.5847v1 |
2014-08-27 | Control of vibrational states by spin-polarized transport in a carbon nanotube resonator | We study spin-dependent transport in a suspended carbon nanotube quantum dot
in contact with two ferromagnetic leads and with the dot's spin coupled to the
flexural mechanical modes. The spin-vibration interaction induces spin-flip
processes between the two energy levels of the dot. This interaction arises
from the spi... | 1408.6357v3 |
2014-09-17 | Momentum resolved spin dynamics of bulk and surface excited states in the topological insulator $\mathrm{Bi_{2}Se_{3}}$ | The prospective of optically inducing a spin polarized current for spintronic
devices has generated a vast interest in the out-of-equilibrium electronic and
spin structure of topological insulators (TIs). In this Letter we prove that
only by measuring the spin intensity signal over several order of magnitude in
spin, t... | 1409.5018v1 |
2014-09-29 | Effectiveness of classical spin simulations for describing NMR relaxation of quantum spins | We investigate the limits of effectiveness of classical spin simulations for
predicting free induction decays (FIDs) measured by solid-state nuclear
magnetic resonance (NMR) on systems of quantum nuclear spins. The specific
limits considered are associated with the range of interaction, the size of
individual quantum s... | 1409.8564v1 |
2014-11-03 | Signatures of Majorana Zero Modes in Spin-Resolved Current Correlations | We consider a normal lead coupled to a Majorana bound state. We show that the
spin-resolved current correlations exhibit unique features which distinguish
Majorana bound states from other low-energy resonances. In particular, the
spin-up and spin-down currents from a Majorana bound state are anti-correlated
at low bias... | 1411.0673v2 |
2014-11-25 | Fast Electrical Control of Single Electron Spins in Quantum Dots with Vanishing Influence from Nuclear Spins | We demonstrate fast universal electrical spin manipulation with inhomogeneous
magnetic fields. With fast Rabi frequency up to 127 MHz, we leave the
conventional regime of strong nuclear-spin influence and observe a spin-flip
fidelity > 96%, a distinct chevron Rabi pattern in the spectral-time domain,
and spin resonance... | 1411.6738v1 |
2015-01-28 | Universal spin-triplet superconducting correlations of Majorana fermions | We establish that Majorana fermions on the boundary of topological
superconductors have only spin-triplet superconducting correlations independent
of whether the bulk superconducting gap is spin singlet or triplet. This is
universal for time-reversal broken (respected) topological superconductors
(TSCs) with an odd num... | 1501.07273v2 |
2015-07-30 | Hierarchical spin-orbital polarisation of a giant Rashba system | The Rashba effect is one of the most striking manifestations of spin-orbit
coupling in solids, and provides a cornerstone for the burgeoning field of
semiconductor spintronics. It is typically assumed to manifest as a
momentum-dependent splitting of a single initially spin-degenerate band into
two branches with opposit... | 1507.08588v1 |
2015-08-26 | Spin Polarization Enhanced by Spin-Triplet Pairing in Sr$_2$RuO$_4$ Probed by NMR | We report a novel phenomenon intimately related to the spin-triplet
superconductivity. It is well known that the spin susceptibility decreases
below the superconducting transition temperature in almost all superconductors
because of spin-singlet pair formation, while it may remain unchanged in a
handful of spin-triplet... | 1508.06421v1 |
2015-10-17 | Direct evidence for minority spin gap in the Co2MnSi Heusler alloy | Half Metal Magnets are of great interest in the field of spintronics because
of their potential full spin-polarization at the Fermi level and low
magnetization damping. The high Curie temperature and predicted 0.7eV minority
spin gap make the Heusler alloy Co2MnSi very promising for applications.We
investigated the hal... | 1510.05085v1 |
2015-10-26 | Magnetic field induced anisotropy of $^{139}\mathrm{La}$ spin-lattice relaxation rates in stripe ordered ${\mathrm{La}}_{1.875}{\mathrm{Ba}}_{0.125}{\mathrm{CuO}}_{4}$ | We report $^{139}$La nuclear magnetic resonance studies performed on a
La$_{1.875}$Ba$_{0.125}$CuO$_4$ single crystal. The data show that the
structural phase transitions (high-temperature tetragonal $\rightarrow$
low-temperature orthorhombic $\rightarrow$ low-temperature tetragonal phase)
are of the displacive type in... | 1510.07529v1 |
2016-10-05 | Prominent role of spin-orbit coupling in FeSe | In most existing theories for iron-based superconductors, spin-orbit coupling
(SOC) has been assumed insignificant. Even though recent experiments have
revealed an influence of SOC on the electronic band structure, whether SOC
fundamentally affects magnetism and superconductivity remains an open question.
Here we use s... | 1610.01277v1 |
2016-10-27 | Purification of an unpolarized spin ensemble into entangled singlet pairs | Dynamical polarization of nuclear spin ensembles is of central importance for
magnetic resonance studies, precision sensing and for applications in quantum
information theory. Here we propose a scheme to generate long-lived singlet
pairs in an unpolarized nuclear spin ensemble which is dipolar coupled to the
electron s... | 1610.08886v2 |
2017-11-09 | Room Temperature Giant Charge-to-Spin Conversion at SrTiO3/LaAlO3 Oxide Interface | Two-dimensional electron gas (2DEG) formed at the interface between SrTiO3
(STO) and LaAlO3 (LAO) insulating layer is supposed to possess strong Rashba
spin-orbit coupling. To date, the inverse Edelstein effect (i.e. spin-to-charge
conversion) in the 2DEG layer is reported. However, the direct effect of
charge-to-spin ... | 1711.03268v1 |
2018-01-23 | Density and $T_1$ of surface and bulk spins in diamond in high magnetic field gradients | We report on surface and bulk spin density measurements of diamond, using
ultra-sensitive magnetic force microscopy with magnetic field gradients up to
0.5 T/$\mu$m. At temperatures between 25 and 800 mK, we measure the shifts in
the resonance frequency and quality factor of a cantilever with a micromagnet
attached to ... | 1801.07535v1 |
2018-11-05 | Nonadiabatic dynamics and geometric phase of an ultrafast rotating electron spin | The spin in a rotating frame has attracted a lot of attentions recently, as
it deeply relates to both fundamental physics such as pseudo-magnetic field and
geometric phase, and applications such as gyroscopic sensors. However, previous
studies only focused on adiabatic limit, where the rotating frequency is much
smalle... | 1811.01641v1 |
2017-05-28 | Breakdown of single spin-fluid model in heavily hole-doped superconductor CsFe2As2 | Although Fe-based superconductors are multiorbital correlated electronic
systems, previous nuclei magnetic resonance (NMR) measurement suggests that a
single spin-fluid model is sufficient to describe its spin behavior. Here, we
firstly observed the breakdown of single spin-fluid model in a heavily
hole-doped Fe-based ... | 1705.09885v1 |
2018-10-01 | Determination of spin Hall angle in heavy metal/CoFeB-based heterostructures with interfacial spin-orbit fields | Magnetization dynamics in W/CoFeB, CoFeB/Pt and W/CoFeB/Pt multilayers was
investigated using spin-orbit-torque ferromagnetic resonance (SOT-FMR)
technique. An analytical model based on magnetization dynamics due to SOT was
used to fit heavy metal (HM) thickness dependence of symmetric and
antisymmetric components of t... | 1810.00641v1 |
2018-12-03 | Spin decoherence independent of antiferromagnetic order in IrMn | We investigate the impact of pinned antiferromagnetic order on the
decoherence of spin current in polycrystalline IrMn. In NiFe/Cu/IrMn/CoFe
multilayers, we coherently pump an electronic spin current from NiFe into IrMn,
whose antiferromagnetic order is globally pinned by static exchange-bias
coupling with CoFe. We obs... | 1812.00702v1 |
2020-04-23 | Nanoscale Detection of Magnon Excitations with Variable Wavevectors Through a Quantum Spin Sensor | We report the optical detection of magnons with a broad range of wavevectors
in magnetic insulator Y3Fe5O12 thin films by proximate nitrogen-vacancy (NV)
single-spin sensors. Through multi-magnon scattering processes, the excited
magnons generate fluctuating magnetic fields at the NV electron spin resonance
frequencies... | 2004.11067v1 |
2016-03-26 | Direct coupling between charge current and spin polarization by extrinsic mechanisms in graphene | Spintronics---the all-electrical control of the electron spin for quantum or
classical information storage and processing---is one of the most promising
applications of the two-dimensional material graphene. Although pristine
graphene has negligible spin-orbit coupling (SOC), both theory and experiment
suggest that SOC... | 1603.08107v2 |
2017-02-13 | Inter-valley dark trion states with spin lifetimes of 150 ns in WSe$_2$ | We demonstrate long trion spin lifetimes in a WSe$_2$ monolayer of up to 150
ns at 5 K. Applying a transverse magnetic field in time-resolved Kerr-rotation
measurements reveals a complex composition of the spin signal of up to four
distinct components. The Kerr rotation signal can be well described by a model
which inc... | 1702.03712v1 |
2017-06-27 | Optical and spin properties of a single praseodymium ion in a crystal | The investigation of single atoms in solids, with both optical and nuclear
spin access is of particularly interest with applications ranging from
nanoscale sensing to quantum computation. Here, we study the optical and spin
properties of single praseodymium ions in an yttrium aluminum garnet (YAG)
crystal at cryogenic ... | 1706.08736v2 |
2017-10-10 | Co-tunneling spin blockade observed in a three-terminal triple quantum dot | We prepare a triple quantum dot with a separate contact lead to each dot to
study Pauli spin blockade in the tunnel-coupled three dots in a row. We measure
the tunneling current flowing between the center dot and either the left or
right dot with the left and right leads as a common source and the center lead
as a drai... | 1710.03378v1 |
2017-10-13 | Optical holonomic single quantum gates with a geometric spin under a zero field | Realization of fast fault-tolerant quantum gates on a single spin is the core
requirement for solid-state quantum-information processing. As polarized light
shows geometric interference, spin coherence is also geometrically controlled
with light via the spin-orbit interaction. Here, we show that a geometric spin
in a d... | 1710.04885v1 |
2019-03-03 | Near-Unity Spin Hall Ratio in Ni$_x$Cu$_{1-x}$ Alloys | We report a large spin Hall effect in the 3$d$ transition metal alloy
Ni$_x$Cu$_{1-x}$ for $x\in\left\{ 0.3,0.75\right\} $, detected via the
ferromagnetic resonance of a Permalloy (Py = Ni$_{80}$Fe$_{20}$) film deposited
in a bilayer with the alloy. A thickness series at $x$ = 0.6, for which the
alloy is paramagnetic a... | 1903.00910v2 |
2019-03-22 | Exceptional points in classical spin dynamics | Non-conservative physical systems admit a special kind of spectral
degeneracy, known as exceptional point (EP), at which eigenvalues and
eigenvectors of the corresponding non-Hermitian Hamiltonian coalesce. Dynamical
parametric encircling of the EP can lead to non-adiabatic evolution associated
with a state flip, a sha... | 1903.09729v2 |
2020-03-28 | Spin transport and dynamic properties of two-dimensional spin-momentum locked states | Materials with spin-momentum locked surface or interface states provide an
interesting playground for studying physics and application of charge-spin
current conversion. To characterize their non-equilibrium magnetic and
transport properties in the presence of a time-dependent external magnetic
field and a spin injecti... | 2003.12700v1 |
2020-11-27 | Experimental Detection of the Correlation Rényi Entropy in the Central Spin Model | We propose and experimentally measure an entropy that quantifies the volume
of correlations among qubits. The experiment is carried out on a nearly
isolated quantum system composed of a central spin coupled and initially
uncorrelated with 15 other spins. Due to the spin-spin interactions,
information flows from the cen... | 2011.13948v1 |
2021-10-05 | Fractional spin excitations and conductance in the spiral staircase Heisenberg ladder | We investigate theoretically the spiral staircase Heisenberg spin-$1/2$
ladder in the presence of antiferromagnetic long-range spin interactions and a
uniform magnetic field. As a special case we also consider the Kondo necklace
model. If the magnetizations of the two chains forming the ladder satisfy a
certain resonan... | 2110.02130v2 |
2021-10-06 | Dissipation-assisted preparation of steady spin-squeezed states of SiV centers | We propose an efficient scheme for generating spin-squeezed states at steady
state in a spin-mechanical hybrid system, where an ensemble of SiV centers are
coupled to a strongly damped nanomechanical resonator. We show that,there
exists a collective steady state in the system, which is exactly formed by the
collective ... | 2110.02837v1 |
2008-06-17 | Effect of environmental spins on Landau-Zener transitions | Landau-Zener (LZ) transitions of a two-level system (e. g., electronic spin
in molecular magnets) coupled to one or many environmental spins (e. g.,
nuclear spins) are studied. For rather general interactions the LZ problem is
reduced to that of a Landau-Zener grid. It is shown analytically that
environmental spins ini... | 0806.2830v1 |
2017-04-20 | Dynamics of a j=3/2 quantum spin liquid | We study a spin-orbital model for 4$d^{1}$ or 5$d^{1}$ Mott insulators in
ordered double perovskites with strong spin-orbit coupling. This model is
conveniently written in terms of pseudospin and pseudo-orbital operators
representing multipoles of the effective $j=3/2$ angular momentum. Similarities
between this model ... | 1704.06134v3 |
2019-09-24 | Manipulation of Inverse Spin Hall Effect in Palladium by Absorption of Hydrogen Gas | The spintronic properties of a palladium thin film have been investigated in
the presence of hydrogen gas in cobalt/palladium bilayers. Measurements of the
inverse spin Hall Effect (ISHE) using cavity ferromagnetic resonance allow
estimations of the spin Hall conductivity and spin diffusion length in both
nitrogen and ... | 1909.10661v1 |
2020-06-11 | Observation of a strongly ferromagnetic spinor Bose-Einstein condensate | We report the observation of strongly ferromagnetic $F=1$ spinor
Bose-Einstein condensates of $^7$Li atoms. The condensates are generated in an
optical dipole trap without using magnetic Feshbach resonances, so that the
condensates have internal spin degrees of freedom. Studying the non-equilibrium
spin dynamics, we ha... | 2006.06228v1 |
2020-12-06 | Femtosecond Laser Writing of Spin Defects in Hexagonal Boron Nitride | Optically active spin defects in wide-bandgap materials have many potential
applications in quantum information and quantum sensing. Spin defects in
two-dimensional layered van der Waals materials are just emerging to be
investigated. Here we demonstrate that optically-addressable spin ensembles in
hexagonal boron nitr... | 2012.03207v2 |
2021-05-12 | Probing Strong Coupling between a Microwave Cavity and a Spin Ensemble with Raman Heterodyne Spectroscopy | Raman heterodyne spectroscopy is a powerful tool for characterizing the
energy and dynamics of spins. The technique uses an optical pump to transfer
coherence from a spin transition to an optical transition where the coherent
emission is more easily detected.
Here Raman heterodyne spectroscopy is used to probe an iso... | 2105.05387v1 |
2021-06-08 | One-directional polarization transport in electron/nuclear spin chains with loss and gain | Understanding the joint dynamics of electron and nuclear spins is central to
core concepts in solid-state magnetic resonance - such as spin-lattice
relaxation and dynamic nuclear polarization - but a generalization that
capitalizes on competing polarization loss and gain channels is still lacking.
Here, we theoreticall... | 2106.04326v1 |
2021-06-28 | The emergent linear Rashba spin-orbit coupling offering the fast manipulation of hole-spin qubits in germanium | The electric dipole spin resonance (EDSR) combining strong spin-orbit
coupling (SOC) and electric-dipole transitions facilitates fast spin control in
a scalable way, which is the critical aspect of the rapid progress made
recently in germanium (Ge) hole-spin qubits. However, a puzzle is raised
because centrosymmetric G... | 2106.14684v2 |
2021-07-21 | Dynamics of two ferromagnetic insulators coupled by superconducting spin current | A conventional superconductor sandwiched between two ferromagnets can
maintain coherent equilibrium spin current. This spin supercurrent results from
the rotation of odd-frequency spin correlations induced in the superconductor
by the magnetic proximity effect. In the absence of intrinsic magnetization,
the superconduc... | 2107.09959v2 |
2021-12-09 | Electronic control and switching of entangled spin state using anisotropy and exchange in the three-particle paradigm | We explore the control and switching of the entangled spin states of
multi-spin particle qubit coupled to an electron using a three-particle spin
model described by $S_i$ ($i=1,2,3$), in which $S_1=\tfrac{1}{2}$ is an
electron and $S_{2,3}$ can have any spin with both exchange coupling and
magnetic anisotropy. We deriv... | 2112.05223v2 |
2021-12-30 | Electrical manipulation of a hole `spin'-orbit qubit in nanowire quantum dot: the nontrivial magnetic field effects | Strong `spin'-orbit coupled one-dimensional hole gas is achievable in a Ge
nanowire in the presence of a strong magnetic field. The strong magnetic field
lifts the two-fold degeneracy in the hole subband dispersions, so that the
effective low-energy subband dispersion exhibits strong `spin'-orbit coupling.
Here, we stu... | 2112.14899v3 |
2022-01-14 | An Anderson impurity interacting with the helical edge states in a quantum spin Hall insulator | Using the natural orbitals renormalization group (NORG) method, we have
investigated the screening of the local spin of an Anderson impurity
interacting with the helical edge states in a quantum spin Hall insulator. We
find that there is a local spin formed at the impurity site and the local spin
is completely screened... | 2201.05308v1 |
2022-01-27 | Effect of vertex corrections on the enhancement of Gilbert damping in spin pumping into a two-dimensional electron gas | We theoretically consider the effect of vertex correction on spin pumping
from a ferromagnetic insulator (FI) into a two-dimensional electron gas (2DEG)
in which the Rashba and Dresselhaus spin-orbit interactions coexist. The
Gilbert damping in the FI is enhanced by elastic spin-flipping or magnon
absorption. We show t... | 2201.11498v3 |
2022-03-09 | Mapping single electron spins with magnetic tomography | Mapping the positions of single electron spins is a highly desired capability
for applications such as nanoscale magnetic resonance imaging and quantum
network characterization. Here, we demonstrate a method based on rotating an
external magnetic field to identify the precise location of single electron
spins in the vi... | 2203.04892v2 |
2022-08-20 | Unravelling the contributions to spin-lattice relaxation in Kramers single-molecule magnets | The study of how spin interacts with lattice vibrations and relaxes to
equilibrium provides unique insights on its chemical environment and the
relation between electronic structure and molecular composition. Despite its
importance for several disciplines, ranging from magnetic resonance to quantum
technologies, a conv... | 2208.09674v1 |
2022-08-24 | 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-cost, scalable
materials whose spins can be coherently manipulated at room temperature is thus
highly-attractive fo... | 2208.11614v1 |
2022-10-30 | Using parity-nonconserving spin-spin coupling to measure the Tl nuclear anapole moment in a TlF molecular beam | An experiment utilizing a TlF molecular beam is being developed by the
CeNTREX collaboration to search for hadronic interactions that violate both
time-reversal (T) and parity (P) invariance. Here we propose to use the same
beam to look for a T-invariance conserving but P-nonconserving (PNC) effect
induced by the anapo... | 2210.16910v2 |
2022-12-07 | Mechanism of Spin Scattering in Ta investigated by Scanning Inverse Spin Hall Effect Meters | In this work, a scanning inverse spin Hall effect measurement system based on
a shorted coaxial resonator has been built, which provides a high throughput
method to characterize spin transport properties. The spin diffusion length of
Ta at room temperature is determined via automatic measurements of Py/Ta
bilayer strip... | 2212.03556v1 |
2023-04-21 | Theory of absorption in a frustrated spin gap system ${\rm SrCu_2(BO_3)_2}$ | We achieve a comprehensive understanding of the magnetic excitations observed
by electric spin resonance and far-infrared spectroscopy in a frustrated spin
gap system ${\rm SrCu_2(BO_3)_2}$ by considering the effects of magnetoelectric
couplings and Dzyaloshinskii-Moriya interactions in the Shastry-Sutherland
model. Th... | 2304.10823v1 |
2023-05-10 | Collisionless dynamics of superconducting gap excited by spin-splitting field | We study the coherent dynamic interaction of a time-dependent spin-splitting
field with the homogeneous superconducting order parameter $\Delta(t)$ mediated
by spin-orbit coupling using the time-dependent Bogoliubov-de Gennes theory. In
the first part of the work we show that linear response of the superconductor
is st... | 2305.06201v1 |
2023-05-16 | Antiferromagnetic spin fluctuations and unconventional superconductivity in topological superconductor candidate YPtBi revealed by $^{195}$Pt-NMR | We report $^{195}$Pt nuclear magnetic resonance (NMR) measurements on
topological superconductor candidate YPtBi which has the broken inversion
symmetry and topological non-trivial band structures due to the strong
spin-orbit coupling(SOC). In the normal state, we find that Knight shift $K$ is
field- and temperature-in... | 2305.09437v1 |
2023-05-23 | Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas | The inverse Rashba-Edelstein effect (IREE) in a two-dimensional electron gas
(2DEG) induced by spin pumping from an adjacent ferromagnetic insulator (FI) is
investigated theoretically. In particular, spin and current densities in the
2DEG in which both Rashba and Dresselhaus spin-orbit interactions coexist are
formulat... | 2305.13953v3 |
2023-07-24 | Super narrow peaks in excitation spectrum of alkali spin polarization: non-adiabatic case of spin dynamics | We theoretically describe the phenomenon of non-adiabatic spin dynamics,
which occurs in a gas cell filled by alkali vapor in presence of a strong
alternating magnetic field and pump light. Steep increase of the spin
polarization occurs if frequency of the magnetic field is equal to the certain
value. Although, the obs... | 2307.12647v2 |
2023-08-22 | Observation of Current-induced Nonlinear Spin Polarization in Pt-Py Bilayers | We experimentally observe nonlinear spin polarization in metallic bilayers of
platinum and permalloy by means of spin-torque ferromagnetic resonance (ST-FMR)
with the spin-Hall effects. The ST-FMR results under massive dc current
injection contain striking features, which are not caused by extrinsic Joule
heating, but ... | 2308.11156v2 |
2023-09-25 | Fast coherent control of nitrogen-14 spins associated with nitrogen-vacancy centers in diamonds using dynamical decoupling | A nitrogen-vacancy (NV) center in a diamond enables the access to an electron
spin, which is expected to present highly sensitive quantum sensors. Although
exploiting a nitrogen nuclear spin improves the sensitivity, manipulating it
using a resonant pulse requires a long gate time owing to its small
gyromagnetic ratio.... | 2309.14278v1 |
2023-09-27 | Direct Sensing of Remote Nuclei: Expanding the Reach of Cross-Effect Dynamic Nuclear Polarization | Dynamic Nuclear Polarization (DNP) has revolutionized the field of
solid-state NMR spectroscopy by significantly enhancing the sensitivity of
nuclear magnetic resonance experiments. Conventionally, cross effect DNP relies
on biradicals to transfer polarization from coupled electron spins to nearby
nuclear spins and sub... | 2309.15653v1 |
2023-10-16 | Generation and detection of spin current in iridate/manganite heterostructures | The present study focuses on experimental investigations of spin current
across the interface of an iridate/manganite heterostructure
(SrIrO3/La0.7Sr0.3MnO3) consisting of oxide epitaxial films with nanometer
thickness. Pure spin current is induced by microwave irradiation in the GHz
frequency band, specifically under ... | 2310.10297v1 |
2023-10-17 | Direct measurement of spin-flip rates in single-electron tunneling | Spin-flips are one of the limiting factors for spin-based information
processing. We demonstrate a transport approach for determining the spin-flip
rates of a self-assembled InAs double quantum dot occupied by a single
electron. In such devices, different Land\'e factors lead to an inhomogeneous
Zeeman splitting, so th... | 2310.11259v2 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.