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 (5)

• Dissipationless Quantum Spin Current at Room Temperature
• 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

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• Double quantum dot as detector of spin bias
• 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
• Drift and Diffusion of Spins Generated by the Spin Hall Effect
• Frequency dependence of induced spin polarization and spin current in quantum wells
• Gilbert damping and spin Coulomb drag in a magnetized electron liquid with spin-orbit interaction
• Kinetic investigation on extrinsic spin Hall effect induced by skew scattering
• Spin Injection in Quantum Wells with Spatially Dependent Rashba Interaction
• Surface states, Friedel oscillations, and spin accumulation in p-doped semiconductors
• Magnification of spin Hall effect in bilayer electron gas
• Spin-Hall effect and spin-coherent excitations in a strongly confined two-dimensional hole gas
• Understanding spin transport from the motion in SU(2)$\times$U(1) fields
• 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
• Influence of inelastic relaxation time on intrinsic spin Hall effects in a disordered two-dimensional electron gas
• Hanle Effect near Boundaries
• Spin magnetotransport in two-dimensional hole systems