Effect of boundary scattering on spin-hall effect

Abstract

The spin dependent reflection in quasi-two-dimensional electron gas from an impenetrable barrier in presence of Rashba and Dresselhaus spin-orbit coupling is analyzed in detail. It is shown that due to spin-orbit effects the reflected beam split in two beams gives rise to multiple reflection analogous to phenomena birefringence. The interplay between Rashba and Dresselhaus spin-orbit coupling gives rise to anisotropy in Fermi energy surface and a non-zero net spin-polarized current oscillating with two frequencies for all the values of incident angle except at $45^o$ when averaged over all components of reflected beam. It is also shown that in over critical region, all the three polarization components as well as net polarization has non-zero values and are exponentially decaying as distance from the barrier increases which in turns spin-accumulation near the barrier is an important consequence of spin-hall effect.

6 pages, 8 figures

References in corpus (8)

• Dissipationless Quantum Spin Current at Room Temperature
• Emergence of the persistent spin helix in semiconductor quantum wells
• Generating Spin Currents in Semiconductors with the Spin Hall Effect
• Spin Accumulation and Equilibrium Currents at the Edge of 2DEGs with Spin-Orbit Coupling
• Drift and Diffusion of Spins Generated by the Spin Hall Effect
• Spin angular impulse due to spin-dependent reflection off a barrier
• Giant edge spin accumulation in a symmetric quantum well with two subbands
• Edge spin accumulation in 2D electron and hole systems in a quasi-ballistic regime