320 citations · 4.5k across the 79 of their papers we have counts for
34 papers · 1 filter
Image of dynamic local exchange interactions in the dc magnetoresistance of spin-polarized current through a dopant
Stephen R. McMillan, Nicholas J. Harmon, Michael E. Flatté
We predict strong, dynamical effects in the dc magnetoresistance of current flowing from a spin-polarized electrical contact through a magnetic dopant in a nonmagnetic host. Using…
Blurring the boundaries between topological and non-topological phenomena in dots
Denis R. Candido, M. E. Flatté, J. Carlos Egues
We investigate the electronic and transport properties of topological and trivial InAsBi quantum dots (QDs). By considering the rapid band gap change within valence ban…
Broadband EPR Spectroscopy in Diverse Field Conditions Using Optically Detected Nitrogen-Vacancy Centers in Diamond
C. M. Purser, V. P. Bhallamudi, C. S. Wolfe +5
Paramagnetic magnetic resonance, a powerful technique for characterizing and identifying chemical targets, is increasingly used for imaging; however, low spin polarization at room…
Spin injection and detection up to room temperature in Heusler~alloy/-GaAs spin valves
T. A. Peterson, S. J. Patel, C. C. Geppert +7
We have measured the spin injection efficiency and spin lifetime in CoFeSi/-GaAs lateral nonlocal spin valves from 20 to 300 K. We observe large (40 V) spin valve s…
Strong modulation of spin currents in bilayer graphene by static and fluctuating proximity exchange fields
Simranjeet Singh, Jyoti Katoch, Tiancong Zhu +6
Two dimensional (2D) materials provide a unique platform to explore the full potential of magnetic proximity driven phenomena, which can be further used for applications in next ge…
Nonlocal Drag of Magnons in a Ferromagnetic Bilayer
Tianyu Liu, G. Vignale, M. E. Flatté
Quantized spin waves, or magnons, in a magnetic insulator are assumed to interact weakly with the surroundings, and to flow with little dissipation or drag, producing exceptionally…
Exchange-driven spin relaxation in ferromagnet/oxide/semiconductor heterostructures
Yu-Sheng Ou, Yi-Hsin Chiu, N. J. Harmon +6
We investigate electron spin relaxation in GaAs in the proximity of a Fe/MgO layer using spin-resolved optical pump-probe spectroscopy, revealing a strong dependence of the spin re…
Spin-orbit coupling and operation of multi-valley spin qubits
M. Veldhorst, R. Ruskov, C. H. Yang +7
Spin qubits composed of either one or three electrons are realized in a quantum dot formed at a Si/SiO_2-interface in isotopically enriched silicon. Using pulsed electron spin reso…
Tunable Giant Spin Hall Conductivities in a Strong Spin-Orbit Semimetal: BiSb
Cüneyt Şahin, Michael E. Flatté
Intrinsic spin Hall conductivities are calculated for strong spin-orbit BiSb semimetals, from the Kubo formula and using Berry curvatures evaluated throughout the Brill…
Electric-field coupling to spin waves in a centrosymmetric ferrite
Xufeng Zhang, Tianyu Liu, Michael E. Flatté +1
We experimentally demonstrate that the spin-orbit interaction can be utilized for direct electric-field tuning of the propagation of spin waves in a single-crystal yttrium iron gar…
Long-lived spin plasmons in a spin-polarized two-dimensional electron gas
Amit Agarwal, Marco Polini, Giovanni Vignale +1
Collective charge-density modes (plasmons) of the clean two-dimensional unpolarized electron gas are stable, for momentum conservation prevents them from decaying into single-parti…
Organic Magnetoelectroluminescence for Room Temperature Transduction between Magnetic and Optical Information
Ferran Macià, Fujian Wang, Nicholas J. Harmon +3
Magnetic and spin-based technologies for data storage and processing pose unique challenges for information transduction to light because of magnetic metals' optical loss, and the…
Distinguishing Spin Relaxation Mechanisms in Organic Semiconductors
N. J. Harmon, M. E. Flatté
A theory is introduced for spin relaxation and spin diffusion of hopping carriers in a disordered system. For disorder described by a distribution of waiting times between hops (e.…
Intrinsic Spin Hall Effect at Oxide Interfaces: a Simple Model
Lorien H. Hayden, R. Raimondi, M. E. Flatte' +1
An asymmetric triangular potential well provides the simplest model for the confinement of mobile electrons at the interface between two insulating oxides, such as LaAlO_3 and SrTi…
Domain wall attraction and repulsion during spin-torque-induced coherent motion
E. A. Golovatski, M. E. Flatté
We calculate the interaction between two magnetic domain walls during their current-induced motion. This interaction produces a separation-dependent resistance and also a different…
g-Factors and diamagnetic coefficients of electrons, holes and excitons in InAs/InP quantum dots
J. van Bree, A. Yu. Silov, P. M. Koenraad +2
The electron, hole, and exciton g-factors and diamagnetic coefficients have been calculated using envelope-function theory for cylindrical InAs/InP quantum dots in the presence of…
Electron beam formation from spin-orbit interactions in zincblende semiconductor quantum wells
David H. Berman, Michael E. Flatté
We find a dramatic enhancement of electron propagation along a narrow range of real-space angles from an isotropic source in a two-dimensional quantum well made from a zincblende s…
Size-dependence of Strong-Coupling Between Nanomagnets and Photonic Cavities
Ö. O. Soykal, M. E. Flatté
The coherent dynamics of a coupled photonic cavity and a nanomagnet is explored as a function of nanomagnet size. For sufficiently strong coupling eigenstates involving highly enta…
Electrical manipulation of an electronic two-state system in Ge/Si quantum dots
C. E. Pryor, M. E. Flatté, J. Levy
We calculate that the electron states of strained self-assembled Ge/Si quantum dots provide a convenient two-state system for electrical control. An electronic state localized at t…
Spin torque and charge resistance of ferromagnetic semiconductor and domain walls
E. A. Golovatski, M. E. Flatté
Charge resistance and spin torque are generated by coherent carrier transport through ferromagnetic 360 degree domain walls, although they follow qualitatively different trends tha…
Electric-field control of a hydrogenic donor's spin in a semiconductor
A. De, Craig E. Pryor, Michael E. Flatté
An AC electric field applied to a donor-bound electron in a semiconductor modulates the orbital character of its wave function, which affects the electron's spin dynamics via the s…
Method for Full Bloch-Sphere Control of a Localized Spin via a Single Electrical Gate
Joseph Pingenot, Craig E. Pryor, Michael E. Flatté
We calculate the dependence on an applied electric field of the g tensor of a single electron in a self-assembled InAs/GaAs quantum dot. We identify dot sizes and shapes for which…
Spin-Hall effect in a [110] quantum well
E. M. Hankiewicz, G. Vignale, M. Flatte
A self-consistent treatment of the spin-Hall effect requires consideration of the spin-orbit coupling and electron-impurity scattering on equal footing. This is done here for the e…
Spin Gunn Effect
Yunong Qi, Zhi-Gang Yu, Michael E. Flatté
We predict that the flow of unpolarized current in electron-doped GaAs and InP at room temperature is unstable at high electric fields to the dynamic formation of spin-polarized cu…