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2019-12-09 | NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO$_3$)$_3$ with a triangular lattice | In this paper, we study the spin excitation properties of the frustrated
triangular-lattice antiferromagnet Yb(BaBO$_3$)$_3$ with nuclear magnetic
resonance. From the spectral analysis, neither magnetic ordering nor spin
freezing is observed with temperature down to $T=0.26$ K, far below its
Curie-Weiss temperature $|\... | 1912.03814v2 |
2019-12-13 | Pulse-width-induced polarization enhancement of optically-pumped N-V electron spin in diamond | The nitrogen-vacancy (N-V) center in diamond is a widely-used platform for
quantum information processing and metrology. The electron-spin state of N-V
center could be initialized and readout optically, and manipulated by resonate
microwave fields. In this work, we analyze the dependence of electron-spin
initialization... | 1912.06284v1 |
2020-01-14 | Hole spin in tunable Ge hut wire double quantum dot | Holes in germanium (Ge) exhibit strong spin-orbit interaction, which can be
exploited for fast and all-electrical manipulation of spin states. Here, we
report transport experiments in a tunable Ge hut wire hole double quantum dot.
We observe the signatures of Pauli spin blockade (PSB) with a large
singlet-triplet energ... | 2001.04834v2 |
2020-05-06 | Sub-Nanosecond Spin-Transfer Torque in an Ensemble of Superparamagnetic-Like Nanomagnets | Spin currents can exert spin-transfer torques on magnetic systems even in the
limit of vanishingly small net magnetization, as is the case for
antiferromagnets. Here, we experimentally show that a spin-transfer torque is
operative in a material with weak, short-range magnetic order -- namely, a
macroscopic ensemble of ... | 2005.03081v1 |
2020-05-14 | High-bandwidth microcoil for fast nuclear spin control | The active manipulation of nuclear spins with radio-frequency (RF) coils is
at the heart of nuclear magnetic resonance (NMR) spectroscopy and spin-based
quantum devices. Here, we present a microcoil transmitter system designed to
generate strong RF pulses over a broad bandwidth, allowing for fast spin
rotations on arbi... | 2005.06837v1 |
2020-05-16 | Simultaneous observation of anti-damping and inverse spin Hall effect in La$_{0.67}$Sr$_{0.33}$MnO$_{3}$/Pt bilayer system | Manganites have shown potential in spintronics because they exhibit high spin
polarization. Here, by ferromagnetic resonance we have studied the damping
properties of La$_{0.67}$Sr$_{0.33}$MnO$_{3}$/Pt bilayers which are prepared by
oxide molecular beam epitaxy. The damping coefficient ($\alpha$) of
La$_{0.67}$Sr$_{0.3... | 2005.07848v3 |
2020-05-18 | Pseudospin-electric coupling for holes beyond the envelope-function approximation | In the envelope-function approximation, interband transitions produced by
electric fields are neglected. However, electric fields may lead to a spatially
local ($k$-independent) coupling of band (internal, pseudospin) degrees of
freedom. Such a coupling exists between heavy-hole and light-hole (pseudo-)spin
states for ... | 2005.08821v2 |
2020-12-23 | Spin noise spectroscopy of a noise-squeezed atomic state | Spin noise spectroscopy is emerging as a powerful technique for studying the
dynamics of various spin systems also beyond their thermal equilibrium and
linear response. Here, we study spin fluctuations of room-temperature neutral
atoms in a Bell-Bloom type magnetometer. Driven by indirect pumping and
undergoing a param... | 2012.12617v1 |
2021-03-04 | X-Ray Scattering from Light-Driven Spin Fluctuations in a Doped Mott Insulator | Manipulating spin fluctuations with ultrafast laser pulses is a promising
route to dynamically control collective phenomena in strongly correlated
materials. However, understanding how photoexcited spin degrees of freedom
evolve at a microscopic level requires a momentum- and energy-resolved
characterization of their n... | 2103.03369v2 |
2021-05-01 | Interacting electron spins in $κ$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]I investigated by ESR spectroscopy | We performed angular and temperature-dependent electron-spin-resonance
measurements in the quasi-two-dimensional organic conductor
$\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]I. The interlayer spin-diffusion is much
weaker compared to the Cl- and Br-analogues, which are antiferromagnetic
insulator and paramagnetic metal, respe... | 2105.00251v1 |
2021-12-16 | Decoupling of Spin Decoherence Paths near Zero Magnetic Field | We demonstrate a method to quantify and manipulate nuclear spin decoherence
mechanisms that are active in zero to ultralow magnetic fields. These include:
(i) non-adiabatic switching of spin quantization axis, due to residual
background fields; (ii) scalar pathways due to through-bond couplings between
$^1$H and hetero... | 2112.08536v1 |
2022-02-03 | Element Doping Enhanced Charge-to-Spin Conversion Efficiency in Amorphous PtSn4 Dirac Semimetal | Topological semimetals (TSs) are promising candidates for low-power
spin-orbit torque (SOT) devices due to their large charge-to-spin conversion
efficiency. Here, we investigated the charge-to-spin conversion efficiency of
amorphous PtSn4 (5 nm)/CoFeB (2.5-12.5 nm) layered structures prepared by a
magnetron sputtering ... | 2202.01384v1 |
2022-02-08 | Spin-Phonon Relaxation in Magnetic Molecules: Theory, Predictions and Insights | Magnetic molecules have played a central role in the development of magnetism
and coordination chemistry and their study keeps leading innovation in
cutting-edge scientific fields such as magnetic resonance, magnetism,
spintronics, and quantum technologies. Crucially, a long spin lifetime well
above cryogenic temperatu... | 2202.03776v1 |
2022-02-15 | Selective measurement of the longitudinal electron spin relaxation time $T_1$ of Ce$^{3+}$ ions in a YAG lattice: Resonant spin inertia | Electron spin oriented along an external magnetic field is subject to
longitudinal spin relaxation with characteristic time $T_1$. The corresponding
decay is nonoscillating, so one cannot readily ascribe $T_1$ to a certain $g$
factor. This becomes a problem when several electronic states with different
$g$ factors are ... | 2202.07223v2 |
2022-05-09 | Direct and alternating magnon spin currents across a junction interface irradiated by linearly polarized laser | The developments in the field of quantum optics raise expectations that
laser-matter coupling is a promising building block for magnonics. Here, we
propose a method for the generation of direct and alternating spin currents of
magnons across the junction interface irradiated by linearly polarized laser.
In a junction o... | 2205.04572v1 |
2022-06-29 | The role of electron polarization on nuclear spin diffusion | Dynamic nuclear polarization (DNP) is capable of boosting signals in nuclear
magnetic resonance by orders of magnitude by creating out-of-equilibrium
nuclear spin polarization. The diffusion of nuclear spin polarization in the
vicinity of paramagnetic dopants is a crucial step for DNP and remains yet not
well understoo... | 2206.14771v1 |
2022-07-14 | Spin relaxation dynamics of radical-pair processes at low magnetic fields | We report measurements of room-temperature spin-relaxation times $T_1$ and
$T_2$ of charge-carrier spins in a $\pi$-conjugated polymer thin film under
bipolar injection and low ($1\mbox{ mT}\lesssim B_0\lesssim 10\mbox{ mT}$)
static magnetic fields, using electrically detected magnetic resonant Hahn-echo
and inversion-... | 2207.07086v1 |
2022-08-10 | Efficient spin-to-charge interconversion in Weyl semimetal TaP at room temperature | In this paper we present spin-to-charge current conversion properties in the
Weyl semimetal TaP by means of the inverse Rashba-Edelstein effect (IREE) with
the integration of this quantum material with the ferromagnetic metal Permalloy
$(Py=Ni_{81}Fe_{19})$. The spin currents are generated in the Py layer by the
spin p... | 2208.05151v1 |
2022-08-29 | Microwave fluorescence detection of spin echoes | Counting the microwave photons emitted by an ensemble of electron spins when
they relax radiatively has recently been proposed as a sensitive method for
electron paramagnetic resonance (EPR) spectroscopy, enabled by the development
of operational Single Microwave Photon Detectors (SMPD) at millikelvin
temperature. Here... | 2208.13586v1 |
2022-09-15 | Chasing the spin gap through the phase diagram of a frustrated Mott insulator | The quest for entangled spin excitations has stimulated intense research on
frustrated magnetic systems. For almost two decades, the triangular-lattice
Mott insulator $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$ has been the hottest
candidate for a $gapless$ quantum spin liquid with itinerant spinons. Very
recently, however, ... | 2209.07639v1 |
2022-10-25 | Constant-adiabaticity ultralow magnetic field manipulations of parahydrogen-induced polarization: application to an AA'X spin system | The field of magnetic resonance imaging with hyperpolarized contrast agents
is rapidly expanding, and parahydrogen-induced polarization (PHIP) is emerging
as an inexpensive and easy-to-implement method for generating the required
hyperpolarized biomolecules. Hydrogenative PHIP delivers hyperpolarized proton
spin order ... | 2210.14342v1 |
2022-12-18 | Exact Entanglement Dynamics of Two Spins in Finite Baths | We consider the buildup and decay of two-spin entanglement through phase
interactions in a finite environment of surrounding spins, as realized in
quantum computing platforms based on arrays of atoms, molecules, or nitrogen
vacancy centers. The non-Markovian dephasing caused by the spin environment
through Ising-type p... | 2212.09151v1 |
2023-01-02 | Topological Kondo Superconductors | Spin-triplet $p$-wave superconductors are promising candidates for
topological superconductors. They have been proposed in various
heterostructures where a material with strong spin-orbit interaction is coupled
to a conventional $s$-wave superconductor by proximity effect. However,
topological superconductors existing ... | 2301.00538v1 |
2023-01-26 | Optical orientation of excitons in a longitudinal magnetic field in indirect band gap (In,Al)As/AlAs quantum dots with type-I band alignment | The exciton recombination and spin dynamics in (In,Al)As/AlAs quantum dots
(QDs) with indirect band gap and type-I band alignment are studied. The
negligible (less than $0.2~\mu$eV) value of the anisotropic exchange
interaction in these QDs prevents a mixing of the excitonic basis states with
pure spin and allows for t... | 2301.11138v1 |
2023-05-18 | Giant optical orientation of exciton spins in lead halide perovskite crystals | Optical orientation of carrier spins by circularly polarized light is the
basis of spin physics in semiconductors. Here, we demonstrate strong optical
orientation of 85\%, approaching the ultimate limit of unity, for excitons in
FA$_{0.9}$Cs$_{0.1}$PbI$_{2.8}$Br$_{0.2}$ lead halide perovskite bulk crystals.
Time-resolv... | 2305.10875v1 |
2023-10-10 | Modulating Resonant Electronic Coupling of Tungsten Diselenide Monolayers with Vanadyl Phthalocyanine for Spin-Valley Polarization Control | Combining the synthetic tunability of molecular compounds with the optical
selection rules of transition metal dichalcogenides (TMDC) that derive from
spin-valley coupling could provide interesting opportunities for the readout of
quantum information. However, little is known about the electronic and spin
interactions ... | 2310.06979v1 |
2023-10-25 | Spin-photon entanglement with direct photon emission in the telecom C-band | The ever-evolving demands for computational power and for a securely
connected world dictate the development of quantum networks where entanglement
is distributed between connected parties. Solid-state quantum emitters in the
telecom C-band are a promising platform for quantum communication applications
due to the mini... | 2310.16930v1 |
2023-11-10 | Spin noise of a halide perovskite | We report on first observation of spin noise in a strongly birefringent
semiconductor -- halide perovskite single crystal MAPbI$_3$. The observed spin
noise resonance is ascribed to free holes with a record spin dephasing time of
4 ns. The spin dynamics is found to be affected by the residual light
absorption of the cr... | 2311.06077v1 |
2024-01-26 | Protocol for certifying entanglement in surface spin systems using a scanning tunneling microscope | Certifying quantum entanglement is a critical step towards realizing
quantum-coherent applications of surface spin systems. In this work, we show
that entanglement can be unambiguously shown in a scanning tunneling microscope
(STM) with electron spin resonance by exploiting the fact that entangled states
undergo a free... | 2401.15017v1 |
2024-04-15 | Optical probing of the carriers-mediated coupling of the spin of two Co atoms in a quantum dot | We report on the optical spectroscopy of the spin of two Co atoms in a
quantum dot and interacting with a single exciton. The spectrum of quantum dots
containing two Co atoms are exchange interaction and by the strain at the
location of the magnetic atoms. A wide range of spectrum can be obtained
depending on the relat... | 2404.09534v1 |
2019-03-20 | A nonreciprocal optical resonator with broken time-invariance for arbitrarily high time-bandwidth performance | Most present-day resonant systems, throughout physics and engineering, are
characterized by a strict time-reversal symmetry between the rates of energy
coupled in and out of the system, which leads to a trade-off between how long a
wave can be stored in the system and the system bandwidth. Any attempt to
reduce the los... | 1903.08386v2 |
2020-07-17 | Gravitational wave detectors with broadband high frequency sensitivity | The binary neutron star coalescence GW170817 was observed by gravitational
wave detectors during the inspiral phase but sensitivity in the 1-5 kHz band
was insufficient to observe the expected nuclear matter signature of the merger
itself, and the process of black hole formation. This provides strong
motivation for imp... | 2007.08766v1 |
2023-05-15 | Extreme mass-ratio inspiral of a spinning body into a Kerr black hole I: Evolution along generic trajectories | The study of spinning bodies moving in curved spacetime has relevance to
binary black hole systems with large mass ratios, as well as being of formal
interest. At zeroth order in a binary's mass ratio, the smaller body moves on a
geodesic of the larger body's spacetime. Post-geodesic corrections describing
forces drivi... | 2305.08919v2 |
2014-10-31 | Spin-orbit coupling in fluorinated graphene | We report on theoretical investigations of the spin-orbit coupling effects in
fluorinated graphene. First-principles density functional calculations are
performed for the dense and dilute adatom coverage limits. The dense limit is
represented by the single-side semifluorinated graphene, which is a metal with
spin-orbit... | 1411.0016v2 |
2018-02-20 | Reverse Monte Carlo reconstruction of electron spin-label coordinates from scanned-probe magnetic resonance microscope signals | Individual electron spins have been observed using magnetic resonance in
combination with a number of distinct detection approaches. The coordinates of
an individual electron spin can then in principle be determined by introducing
a 10 to 100 nm diameter magnetic needle, scanning the needle, and collecting
signal as a ... | 1802.07247v1 |
2020-11-26 | Direct high resolution resonant Raman scattering measurements of InAs quantum dot dynamic nuclear spin polarization states | We report on the direct measurement of the electron spin splitting and the
accompanying nuclear Overhauser (OH) field, and thus the underlying nuclear
spin polarization (NSP) and fluctuation bandwidth, in a single InAs quantum dot
under resonant excitation conditions with unprecedented spectral resolution.
The electron... | 2011.13249v1 |
2020-12-29 | Coherent single-spin electron resonance spectroscopy manifested at an exceptional-point singularity in a doped polyacetylene | Spin-dependent charge transfer decay in an alkali atom doped polyacetylene is
studied in terms of the complex spectral analysis, revealing the single-spin
Zeeman splitting influenced by the spin-orbit interaction. Nonhermitian
effective Hamiltonian has been derived from the total system hermitian
Hamiltonian using Bril... | 2012.14655v1 |
2011-03-31 | Acoustic spin pumping as the origin of the long-range spin Seebeck effect | The spin Seebeck effect (SSE) is known as the generation of 'spin voltage' in
a magnet as a result of a temperature gradient. Spin voltage stands for the
potential for spins, which drives a spin current. The SSE is of crucial
importance in spintronics and energy-conversion technology, since it enables
simple and versat... | 1103.6120v1 |
2011-08-08 | Spin-Orbital Locking, Emergent Pseudo-Spin, and Magnetic order in Honeycomb Lattice Iridates | The nature of the effective spin Hamiltonian and magnetic order in the
honeycomb iridates is explored by considering a trigonal crystal field effect
and spin-orbit coupling. Starting from a Hubbard model, an effective spin
Hamiltonian is derived in terms of an emergent pseudo-spin-1/2 moment in the
limit of large trigo... | 1108.1806v3 |
2015-03-17 | Successive magnetic transitions relating to itinerant spins and localized Cu spins in La2-xSrxCu1-yFeyO4: Possible existence of stripe correlations in the overdoped regime | In order to investigate the relationship between the so-called stripe
correlations and the high-Tc superconductivity, we have carried out magnetic
susceptibility and zero-field muon-spin-relaxation measurements in partially
Fe-substituted La2-xSrxCu1-yFeyO4 (LSCFO). It has been found that the Fe
substitution induces su... | 1503.04902v1 |
2015-07-25 | Quantum entanglement in the one-dimensional spin-orbital SU(2)$\otimes XXZ$ model | We investigate the phase diagram and the spin-orbital entanglement of a
one-dimensional SU(2)$\otimes XXZ$ model with SU(2) spin exchange and
anisotropic $XXZ$ orbital exchange interactions and negative exchange coupling.
As a unique feature, the spin-orbital entanglement entropy in the entangled
ground states increase... | 1507.07103v1 |
2016-02-25 | Phase diagram and collective excitation in excitonic insulator: from the orbital physics viewpoint | Excitonic insulating system is studied from the viewpoints of the orbital
physics in strongly correlated electron systems. An effective model Hamiltonian
for low-energy electronic states is derived from the two-orbital Hubbard model
with a finite energy difference corresponding to the crystalline field
splitting. The e... | 1602.07831v2 |
2018-11-10 | Spin-valley half-metal in systems with Fermi surface nesting | Half-metals have fully spin polarized charge carriers at the Fermi surface.
Such polarization usually occurs due to strong electron--electron correlations.
Recently [Phys. Rev. Lett. {\bf{119}}, 107601 (2017)], we have demonstrated
theoretically that adding (or removing) electrons to systems with Fermi surface
nesting ... | 1811.04202v1 |
2020-03-05 | The Evolution of Primordial Black Holes and their Final Observable Spins | Primordial black holes in the mass range of ground-based gravitational-wave
detectors can comprise a significant fraction of the dark matter. Mass and spin
measurements from coalescences can be used to distinguish between an
astrophysical or a primordial origin of the binary black holes. In standard
scenarios the spin ... | 2003.02778v2 |
2019-10-21 | High-frequency magnon excitation due to femtosecond spin-transfer torques | Femtosecond laser pulses can induce ultrafast demagnetization as well as
generate bursts of hot electron spin currents. In trilayer spin valves
consisting of two metallic ferromagnetic layers separated by a nonmagnetic one,
hot electron spin currents excited by an ultrashort laser pulse propagate from
the first ferroma... | 1910.09412v1 |
2022-11-08 | Spin effects in Spherical Harmonic Modes of Gravitational Waves from Eccentric Compact Binary Inspirals | We compute the leading and sub-leading spin effects through the second
post-Newtonian order (2PN) in spherical harmonic modes of gravitational
waveforms from inspiralling compact binaries in non-circular orbits with
non-precessing components. The two spin couplings, linear-in-spin (spin-orbit;
SO) and quadratic-in-spin... | 2211.04155v2 |
2023-02-14 | Collapsar Gamma-ray Bursts Grind their Black Hole Spins to a Halt | The spin of a newly formed black hole (BH) at the center of a massive star
evolves from its natal value due to two competing processes: accretion of gas
angular momentum that increases the spin, and extraction of BH angular momentum
by outflows that decreases the spin. Ultimately, the final, equilibrium spin is
set by ... | 2302.07281v1 |
2023-02-22 | Quantum sensing and imaging with spin defects in hexagonal boron nitride | Color centers in hexagonal boron nitride (hBN) have recently emerged as
promising candidates for a new wave of quantum applications. Thanks to hBN's
high stability and 2-dimensional (2D) layered structure, color centers in hBN
can serve as robust quantum emitters that can be readily integrated into
nanophotonic and pla... | 2302.11169v2 |
2023-08-02 | Constraining the nature of dark compact objects with spin-induced octupole moment measurement | Various theoretical models predict the existence of exotic compact objects
that can mimic the properties of black holes (BHs). Gravitational waves (GWs)
from the mergers of compact objects have the potential to distinguish between
exotic compact objects and BHs. The measurement of spin-induced multipole
moments of comp... | 2308.01309v2 |
2023-11-20 | Ground state of the $S$=1/2 pyrochlore Heisenberg antiferromagnet: A quantum spin liquid emergent from dimensional reduction | The quantum antiferromagnet on the pyrochlore lattice offers an archetypal
frustrated system, which potentially realizes a quantum spin liquid
characterized by the absence of standard spontaneous symmetry breaking even at
zero temperature, unusually as an isotropic 3D system. Despite tremendous
progress in the literatu... | 2311.11561v1 |
2005-05-16 | Spin-Dependent Cyclotron Decay Rates in Strong Magnetic Fields | Cyclotron decay and absorption rates have been well studied in the
literature, focusing primarily on spectral, angular and polarization
dependence. Astrophysical applications usually do not require retention of
information on the electron spin state, and these are normally averaged in
obtaining the requisite rates. In ... | 0505327v1 |
2007-06-27 | Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study | We systematically study the influence of ferromagnetic leads on the Kondo
resonance in a quantum dot tuned to the local moment regime. We employ Wilson's
numerical renormalization group method, extended to handle leads with a spin
asymmetric density of states, to identify the effects of (i) a finite spin
polarization i... | 0706.3997v1 |
2013-01-17 | 63,65Cu Nuclear Resonance Study of the Coupled Spin Dimers and Chains Compound Cu2Fe2Ge4O13 | Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) of Cu
have been measured in a coupled spin dimers and chains compound Cu2Fe2Ge4O13.
Cu NQR has also been measured in an isostructural material Cu2Sc2Ge4O13
including only spin dimers. Comparison of the temperature dependence of the
63Cu nuclear spi... | 1301.3974v2 |
2013-02-01 | $Ξ$ baryon strong decays in a chiral quark model | The strong decays of $\Xi$ baryons up to N=2 shell were studied in a chiral
quark model. The strong decay properties of these well-established ground
decuplet baryons were reasonably described. We found that (i) $\Xi(1690)$ and
$\Xi(1820)$ could be assigned to the spin-parity $J^P=1/2^-$ state
$|70,^{2}{8},1,1,1/2^->$ ... | 1302.0079v2 |
2014-07-23 | Preferential antiferromagnetic coupling of vacancies in graphene on SiO_2: Electron spin resonance and scanning tunneling spectroscopy | Monolayer graphene grown by chemical vapor deposition and transferred to
SiO_2 is used to introduce vacancies by Ar^+ ion bombardment at a kinetic
energy of 50 eV. The density of defects visible in scanning tunneling
microscopy (STM) is considerably lower than the ion fluence implying that most
of the defects are singl... | 1407.6280v2 |
2016-06-24 | The Spin-Orbit Evolution of GJ 667C System: The Effect of Composition and Other Planet's Perturbations | Potentially habitable planets within the habitable zone of M-dwarfs are
affected by tidal interaction. We studied the tidal evolution in GJ 667C using
a numerical code we call TIDEV. We reviewed the problem of the dynamical
evolution focusing on the effects that a rheological treatment, different
compositions and the i... | 1606.07546v2 |
2017-07-13 | Feedback control optimisation of ESR experiments | Numerically optimised microwave pulses are used to increase excitation
efficiency and modulation depth in electron spin resonance experiments
performed on a spectrometer equipped with an arbitrary waveform generator. The
optimisation procedure is sample-specific and reminiscent of the magnet
shimming process used in th... | 1707.05184v3 |
2017-08-14 | Super-spinning compact objects and models of high-frequency quasi-periodic oscillations observed in Galactic microquasars. II. Forced resonances | In our previous work (Paper I) we applied several models of high-frequency
quasi-periodic oscillations (HF QPOs) to estimate the spin of the central
compact object in three Galactic microquasars assuming the possibility that the
central compact body is a super-spinning object (or a naked singularity) with
external spac... | 1708.04300v1 |
2018-12-09 | Spin squeezing via one- and two-axis twisting induced by a single off-resonance stimulated Raman scattering in a cavity | Squeezed spin states have important applications in quantum metrology and
sensing. It has been shown by S{\o}rensen and M{\o}lmer [Phys. Rev. A 66,
022314(2002)] that an effective one-axis-twisting interaction can be realized
in a cavity setup via a double off-resonance stimulated Raman scattering,
resulting in a noise... | 1812.03463v2 |
2016-03-09 | Suppression of spin-exciton state in hole overdoped iron-based superconductors | The mechanism of Cooper pair formation in iron-based superconductors remains
a controversial topic. The main question is whether spin or orbital
fluctuations are responsible for the pairing mechanism. To solve this problem,
a crucial clue can be obtained by examining the remarkable enhancement of
magnetic neutron scatt... | 1603.02762v1 |
2017-04-05 | Influence of the nuclear Zeeman effect on mode locking in pulsed semiconductor quantum dots | The coherence of the electron spin in a semiconductor quantum dot is strongly
enhanced by mode locking through nuclear focusing, where the synchronization of
the electron spin to periodic pulsing is slowly transferred to the nuclear
spins of the semiconductor material, mediated by the hyperfine interaction
between thes... | 1704.01468v2 |
2020-12-18 | Single-electron spin resonance in a nanoelectronic device using a global field | Spin-based silicon quantum electronic circuits offer a scalable platform for
quantum computation, combining the manufacturability of semiconductor devices
with the long coherence times afforded by spins in silicon. Advancing from
current few-qubit devices to silicon quantum processors with upwards of a
million qubits, ... | 2012.10225v3 |
2022-01-19 | Supercurrent in the presence of direct transmission and a resonant localized state | Inspired by recent experimental findings that will be presented elsewhere, we
formulate and investigate a model of a superconducting junction that combines
the electron propagation in a quantum channel with an arbitrary transmission,
and that through a localized state. Interesting situation occurs if the energy
of the ... | 2201.07848v1 |
2022-07-24 | Tilting Uranus via Secular Spin-Orbit Resonance with Planet 9 | Uranus' startlingly large obliquity of 98 degrees has yet to admit a
satisfactory explanation. The most widely accepted hypothesis involving a giant
impactor that tipped Uranus onto its side encounters several difficulties with
regards to the Uranus' spin rate and its prograde satellite system. An
obliquity increase th... | 2207.11823v1 |
2022-07-31 | Possible coexistence of short-range resonating-valence-bond and long-range stripe correlations in the spatially anisotropic triangular-lattice quantum magnet Cu$_2$(OH)$_3$NO$_3$ | We show that short-range resonating-valence-bond correlations and long-range
order can coexist in the ground state (GS) of a frustrated spin system. Our
study comprises a comprehensive investigation of the quantum magnetism on the
structurally disorder-free single crystal of Cu$_2$(OH)$_3$NO$_3$, which
realizes the $s$... | 2208.00382v1 |
2023-10-02 | Evolution of Stellar Bars in Spinning Dark Matter Halos and Stellar Bulges | We use high-resolution numerical simulations to follow the barred disk
evolution in a suite of models with progressively more massive stellar bulges,
with bulge-to-total (disk$+$bulge) mass ratios of $B/T\sim 0-0.25$, embedded in
dark matter (DM) halos with the spin $\lambda \sim 0 - 0.09$. We focus on
models with a se... | 2310.01411v1 |
2023-10-19 | Resonant TERS of a Single-Molecule Kondo System | Single-molecule tip-enhanced Raman spectroscopy (TERS) under ultra-high
vacuum (UHV) and cryogenic conditions enables exploration of the relations
between the adsorption geometry, electronic state, and vibrational fingerprints
of individual molecules. TERS capability of reflecting spin states in
open-shell molecular co... | 2310.12546v1 |
2011-01-19 | Spectral properties of cylindrical quasi-optical cavity resonator with random-inhomogeneous side boundary: correlation between dephasing and dissipation | A rigorous solution for the spectrum of quasioptical cylindrical cavity
resonator with a randomly rough side boundary has been obtained for the first
time. To accomplish this task, we have developed a novel method for variables
separation in wave equation, which enables one, in principle, to rigorously
examine any limi... | 1101.3743v2 |
2011-06-19 | Oscillatory Energy Exchange Between Waves Coupled by a Dynamic Artificial Crystal | We describe a general mechanism of controllable energy exchange between waves
propagating in a dynamic artificial crystal. We show that if a spatial
periodicity is temporarily imposed on the transmission properties of a
wave-carrying medium whilst a wave is inside, this wave is coupled to a
secondary counter-propagatin... | 1106.3722v1 |
2017-03-07 | Partial waves in $B_s^* \bar B_s^*$ production in $e^+e^-$ annihilation near threshold | The production of the vector meson pairs $B_s^* \bar B_s^*$ in the $e^+e^-$
annihilation is generally contributed by two $P$ wave amplitudes with different
total spin $S$ of the mesons, $S=0$ and $S=2$, and also by an $F$ wave
amplitude. Belle has recently reported a study of the available data at the
energy of the $\U... | 1703.02524v1 |
2003-06-19 | Theory of the Mercury's spin-orbit motion and analysis of its main librations | The upcoming space missions, MESSENGER and BepiColombo with onboard
instrumentation capable of measuring the rotational parameters stimulate the
objective to reach an accurate theory of the rotational motion of Mercury. For
obtaining the real motion of Mercury, we have used our relativistic BJV model
of solar system in... | 0306387v2 |
2004-02-13 | Probing spin and orbital Kondo effects with a mesoscopic interferometer | We investigate theoretically the transport properties of a closed
Aharonov-Bohm interferometer containing two quantum dots in the strong coupling
regime. We find two distinct physical scenarios depending on the strength of
the interdot Coulomb interaction. When the interdot Coulomb interaction is
negligible only spin f... | 0402361v2 |
2011-06-15 | Non-Zeeman splitting for a spin-resolved STM with a Kondo adatom in a spin-polarized two-dimensional electron gas | We theoretically investigate the spin-resolved local density of states
(SR-LDOS) of a spin-polarized two-dimensional electron gas in the presence of a
Kondo adatom and a STM probe. Using Green function formalism and the atomic
approach in the limit of infinite Coulomb correlation, it is found an
analytical SR-LDOS expr... | 1106.2853v5 |
2011-10-24 | Enhancement of the Electron Spin Resonance of Single-Walled Carbon Nanotubes by Oxygen Removal | We have observed a nearly fourfold increase in the electron spin resonance
(ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to
oxygen desorption. By performing temperature-dependent ESR spectroscopy both
before and after thermal annealing, we found that the ESR in SWCNTs can be
reversibly al... | 1110.5220v1 |
2013-09-25 | Sensing and atomic-scale structure analysis of single nuclear spin clusters in diamond | Single-molecule nuclear magnetic resonance (NMR) is a crown-jewel challenge
in the field of magnetic resonance spectroscopy and has important applications
in chemical analysis and in quantum computing. Recently, it becomes possible to
tackle this grand challenge thanks to experimental advances in preserving
quantum coh... | 1309.6548v1 |
2016-08-02 | RESPECT: Neutron Resonance Spin-Echo Spectrometer for Extreme Studies | We propose the design of a Resonance SPin-echo spECtrometer for exTreme
studies, RESPECT, that is ideally suited for the exploration of non-dispersive
processes such as diffusion, crystallization, slow dynamics, tunneling
processes, crystal electric field excitations, and spin fluctuations. It is a
variant of the conve... | 1608.00836v1 |
2016-10-17 | Momentum and doping dependence of spin excitations in electron-doped cuprate superconductors | Superconductivity in copper oxides emerges on doping holes or electrons into
their Mott insulating parent compounds. The spin excitations are thought to be
the mediating glue for the pairing in superconductivity. Here the momentum and
doping dependence of the dynamical spin response in the electron-doped cuprate
superc... | 1610.05041v2 |
2017-08-08 | Spin-orbit-torque driven magnetoimpedance in Pt-layer/magnetic-ribbon heterostructures | When a flow of electron passes through a paramagnetic layer with strong
spin-orbit-coupling such as platinum (Pt), a net spin current is produced via
spin Hall effect (SHE). This spin current can exert a torque on the
magnetization of an adjacent ferromagnetic layer which can be probed via
magnetization dynamic respons... | 1708.02402v2 |
2018-03-27 | Theory of Hole-Spin Qubits in Strained Germanium Quantum Dots | We theoretically investigate the properties of holes in a
Si$_{x}$Ge$_{1-x}$/Ge/ Si$_{x}$Ge$_{1-x}$ quantum well in a perpendicular
magnetic field that make them advantageous as qubits, including a large
($>$100~meV) intrinsic splitting between the light and heavy hole bands, a very
light ($\sim$0.05$\, m_0$) in-plane ... | 1803.10320v5 |
2019-05-27 | The Chaotic Nature of TRAPPIST-1 Planetary Spin States | The TRAPPIST-1 system has 7 known terrestrial planets arranged compactly in a
mean motion resonant chain around an ultra-cool central star, some within the
estimated habitable zone. Given their short orbital periods of just a few days,
it is often presumed that the planets are tidally locked such that the spin
rate is ... | 1905.11419v2 |
2021-02-25 | Unidirectional magnetoresistance and spin-orbit torque in NiMnSb | Spin-dependent transport phenomena due to relativistic spin-orbit coupling
and broken space-inversion symmetry are often difficult to interpret
microscopically, in particular when occurring at surfaces or interfaces. Here
we present a theoretical and experimental study of spin-orbit torque and
unidirectional magnetores... | 2102.12838v1 |
2021-03-31 | Resistively detected NMR as a probe of the topological nature of conducting edge/surface states | Electron spins in edge or surface modes of topological insulators (TIs) with
strong spin-orbit coupling cannot be directly manipulated with microwaves due
to the locking of electron spin to its momentum. We show by contrast that a
resistively detected nuclear magnetic resonance (RDNMR) based technique can be
used to pr... | 2104.00146v2 |
2021-10-13 | Spin-lasing in bimodal quantum dot micropillar cavities | Spin-controlled lasers are highly interesting photonic devices and have been
shown to provide ultra-fast polarization dynamics in excess of 200 GHz. In
contrast to conventional semiconductor lasers their temporal properties are not
limited by the intensity dynamics, but are governed primarily by the
interaction of the ... | 2110.06960v1 |
2008-06-25 | Ultrafast control of donor-bound electron spins with single detuned optical pulses | The ability to control spins in semiconductors is important in a variety of
fields including spintronics and quantum information processing. Due to the
potentially fast dephasing times of spins in the solid state [1-3], spin
control operating on the picosecond or faster timescale may be necessary. Such
speeds, which ar... | 0806.4137v1 |
2019-12-22 | A single-hole spin qubit | Qubits based on quantum dots have excellent prospects for scalable quantum
technology due to their inherent compatibility with standard semiconductor
manufacturing. While early on it was recognized that holes may offer a
multitude of favourable properties for fast and scalable quantum control,
research thus far has rem... | 1912.10426v2 |
2020-01-25 | Resonant Exchange Operation in Triple-Quantum-Dot Qubits for Spin-Photon Transduction | Triple quantum dots (TQDs) are promising semiconductor spin qubits because of
their all-electrical control via fast, tunable exchange interactions and
immunity to global magnetic fluctuations. These qubits can experience strong
transverse interaction with photons in the resonant exchange (RX) regime, when
exchange is s... | 2001.09240v3 |
2020-10-15 | Longitudinal and transverse electric field manipulation of hole spin-orbit qubits in one-dimensional channels | Holes confined in semiconductor nanostructures realize qubits where the
quantum mechanical spin is strongly mixed with the quantum orbital angular
momentum. The remarkable spin-orbit coupling allows for fast all electrical
manipulation of such qubits. We study an idealization of a CMOS device where
the hole is strongly... | 2010.07787v2 |
2023-03-05 | Resonant two-laser spin-state spectroscopy of a negatively charged quantum dot-microcavity system with a cold permanent magnet | A high-efficiency spin-photon interface is an essential piece of quantum
hardware necessary for various quantum technologies. Self-assembled InGaAs
quantum dots have excellent optical properties, if embedded into an optical
micro-cavity they can show near-deterministic spin-photon entanglement and spin
readout, but an ... | 2303.02763v1 |
2023-06-20 | Spin-orbit interaction enabled electronic Raman scattering from charge collective modes | Electronic Raman scattering in the fully symmetric channel couples to the
charge excitations in the system, including the plasmons. However, the plasmon
response has a spectral weight of $\sim q^2$, where $q$, the momentum
transferred by light, is small. In this work, we show that in inversion
symmetry broken systems w... | 2306.11240v2 |
2007-05-10 | Some properties of the resonant state in quantum mechanics and its computation | The resonant state of the open quantum system is studied from the viewpoint
of the outgoing momentum flux. We show that the number of particles is
conserved for a resonant state, if we use an expanding volume of integration in
order to take account of the outgoing momentum flux; the number of particles
would decay expo... | 0705.1388v2 |
2012-06-25 | Crosstalk Reduction for Superconducting Microwave Resonator Arrays | Large-scale arrays of Microwave Kinetic Inductance Detectors (MKIDs) are
attractive candidates for use in imaging instruments for next generation
submillimeter-wave telescopes such as CCAT. We have designed and fabricated
tightly packed ~250-pixel MKID arrays using lumped-element resonators etched
from a thin layer of ... | 1206.5571v1 |
2016-06-29 | Double resonance response of a superconducting quantum metamaterial: manifestation of non-classical states of photons | We report a theoretical study of ac response of superconducting quantum
metamaterials (SQMs), i.e. an array of qubits (two-levels system) embedded in
the low-dissipative resonator. By making use of a particular example of SQM,
namely the array of charge qubits capacitively coupled to the resonator, we
obtain a second-o... | 1606.09078v1 |
2017-06-20 | Transition of EMRIs through resonance: corrections to higher order in the on-resonance flux modification | Extreme mass ratio in-spirals (EMRIs) are candidate events for gravitational
wave detection in the millihertz range (by detectors like LISA and eLISA).
These events involve a stellar-mass black hole, or a similar compact object,
descending in the gravitational field of a supermassive black hole, eventually
merging with... | 1706.06639v3 |
2020-03-23 | Mathematical analysis of electromagnetic scattering by dielectric nanoparticles with high refractive indices | In this work, we are concerned with the mathematical modeling of the
electromagnetic (EM) scattering by arbitrarily shaped non-magnetic
nanoparticles with high refractive indices. When illuminated by visible light,
such particles can exhibit a very strong isotropic magnetic response, resulting
from the coupling of the ... | 2003.10223v2 |
2020-09-16 | Unconventional magnon excitation by off-resonant microwaves | It is widely recognized that a physical system can only respond to a periodic
driving significantly when the driving frequency matches the normal mode
frequency of the system, which leads to resonance. Off-resonant phenomena are
rarely considered because of the difficulty to realize strong coupling between
physical sys... | 2009.07948v2 |
2019-04-08 | Point-dipole approximation for small systems of strongly coupled radiating nanorods | Systems of closely-spaced resonators can be strongly coupled by interactions
mediated by scattered electromagnetic fields. In large systems the resulting
response has been shown to be more sensitive to these collective interactions
than to the detailed structure of individual resonators. Attempts to describe
such syste... | 1904.03935v1 |
2019-08-26 | Individual nanoantennas empowered by bound states in the continuum for nonlinear photonics | Bound states in the continuum (BICs) represent localized modes with energies
embedded in the continuous spectrum of radiating waves. BICs were discovered
initially as a mathematical curiosity in quantum mechanics, and more recently
were employed in photonics. Pure mathematical bound states have
infinitely-large quality... | 1908.09790v1 |
2020-05-25 | Observation of supercavity modes in subwavelength dielectric resonators | Electromagnetic response of dielectric resonators with high refractive index
is governed by optically induced electric and magnetic Mie resonances
facilitating confinement of light with the amplitude enhancement. However,
strong subwavelength trapping of light was associated traditionally only with
plasmonic or epsilon... | 2006.02262v2 |
2020-06-08 | Applicability of the Rytov full effective-medium formalism to the physical description and design of resonant metasurfaces | Periodic photonic lattices constitute a fundamental pillar of physics
supporting a plethora of scientific concepts and applications. The advent of
metamaterials and metastructures is grounded in deep understanding of their
properties. Based on the original 1956 formulation by Rytov, it is well known
that a photonic lat... | 2006.04852v1 |
2020-12-30 | Nonlinear effects in locally-resonant nanostrip phononic metasurface at GHz frequencies | In this paper, we report on the observation of nonlinear effects in a
nanostrip phononic metasurface (NPM) that enable the tuning of resonance
frequencies at 1.42 GHz. The NPM resonator made of periodic nanostrip array is
fabricated on a lithium niobate substrate. Each of the nanostrip is 250-nm wide
and is made of 680... | 2012.15314v1 |
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