Generating Spin Currents in Semiconductors with the Spin Hall Effect

Abstract

We investigate electrically-induced spin currents generated by the spin Hall effect in GaAs structures that distinguish edge effects from spin transport. Using Kerr rotation microscopy to image the spin polarization, we demonstrate that the observed spin accumulation is due to a transverse bulk electron spin current, which can drive spin polarization nearly 40 microns into a region in which there is minimal electric field. Using a model that incorporates the effects of spin drift, we determine the transverse spin drift velocity from the magnetic field dependence of the spin polarization.

4 pages, 4 figures

References in corpus (13)

• Spin Hall effect
• Universal Intrinsic Spin-Hall Effect
• Dissipationless Quantum Spin Current at Room Temperature
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Spatial imaging of the spin Hall effect and current-induced polarization in two-dimensional electron gases
• Current induced electron spin polarization in strained semiconductors
• On A Proper Definition of Spin Current
• Theory of Spin Hall conductivity in n-doped GaAs
• Electrical Detection of Spin Accumulation at a Ferromagnet-Semiconductor Interface
• Spin Hall Effect in Doped Semiconductor Structures
• Edge spin accumulation in semiconductor two-dimensional hole gases
• Spin Accumulation in the Extrinsic Spin Hall Effect
• Spatial Imaging of Magnetically Patterned Nuclear Spins in GaAs

Cited by in corpus (51)

• Semiconductor Spintronics
• Spin pumping with coherent elastic waves
• Quantum transport in Rashba spin-orbit materials: A review
• Current-Induced Polarization and the Spin Hall Effect at Room Temperature
• Observation of a One-Dimensional Spin-Orbit Gap in a Quantum Wire
• Transport Properties and Diamagnetism of Dirac Electrons in Bismuth
• Nonlocal Charge Transport Mediated by Spin Diffusion in the Spin-Hall Effect Regime
• Persistent spin current in nano-devices and definition of the spin current
• Topological insulator: a new quantized spin Hall resistance robust to dephasing
• Pump-Probe Faraday Rotation and Ellipticity in an Ensemble of Singly Charged Quantum Dots
• Spin Nernst effect and Nernst effect in two-dimensional electron systems
• Intrinsic Spin Hall Effect Induced by Quantum Phase Transition in HgCdTe Quantum Wells
• Tunable Giant Spin Hall Conductivities in a Strong Spin-Orbit Semimetal: Bi${}_{1-x}$Sb${}_x$
• Electrical generation of pure spin currents in a two-dimensional electron gas
• Influence of dephasing process on the quantum Hall effect and the spin Hall effect
• Double quantum dot as detector of spin bias
• Theory of coupled spin-charge transport due to spin-orbit interaction in inhomogeneous two-dimensional electron liquids
• Spin Hall photoconductance in a 3D topological insulator at room temperature
• Detection of spin polarized currents in quantum point contacts via transverse electron focusing
• Spin Hall effect in the kagome lattice with Rashba spin-orbit interaction
• Spin-Hall edge spin polarization in a ballistic 2D electron system
• Frequency dependence of induced spin polarization and spin current in quantum wells
• Drift and Diffusion of Spins Generated by the Spin Hall Effect
• Gilbert damping and spin Coulomb drag in a magnetized electron liquid with spin-orbit interaction
• Macroscopic transverse drift of long current-induced spin coherence in two-dimensional electron gases
• Induced spin-orbit coupling in silicon thin films by bismuth doping
• A proposal for the measurement of Rashba and Dresselhaus spin-orbit interaction strengths in a single sample
• Kinetic investigation on extrinsic spin Hall effect induced by skew scattering
• Geometric Correlations and Breakdown of Mesoscopic Universality in Spin Transport
• Spin Injection in Quantum Wells with Spatially Dependent Rashba Interaction
• Magnification of spin Hall effect in bilayer electron gas
• Surface states, Friedel oscillations, and spin accumulation in p-doped semiconductors
• Spin-Hall effect and spin-coherent excitations in a strongly confined two-dimensional hole gas
• Phase biasing of a Josephson junction using Rashba-Edelstein effect
• Understanding spin transport from the motion in SU(2)$\times$U(1) fields
• Measurements of the magnetic properties of conduction electrons
• Generation and detection of dissipationless spin current in MgO/Si bilayer
• Domain-wall-controlled transverse spin injection
• Understanding spin Hall effects from the motion in SU(2)XU(1) fields
• Coupled spin-charge drift-diffusion approach for a two-dimensional electron gas with Rashba spin-orbit coupling
• Spin generation away from boundaries by nonlinear transport
• Bulk Spin-Hall Effect
• Macroscopic transport of a current-induced spin polarization
• Hanle Effect near Boundaries
• Influence of inelastic relaxation time on intrinsic spin Hall effects in a disordered two-dimensional electron gas
• Steady-state spin densities and currents
• Spin magnetotransport in two-dimensional hole systems
• Intrinsic Spin Hall Effect with Spin-Tensor-Momentum Coupling
• Effects of scattering area shape on spin conductance in a four-terminal spin-Hall setup
• Effect of boundary scattering on spin-hall effect
• Screening effect in Spin-Hall Devices