Regular Article

Effect of boundary scattering on spin-hall effect

¹ Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
² Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211019 India
³ Homi Bhaha National Institute, Anushaktinagar Mumbai, Maharashtra 400094, India

^a e-mail: shishir.kr.pandey@gmail.com
^b Present address: International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, P.R. China.

Received: 10 August 2018
Received in final form: 4 April 2019
Published online: 19 June 2019

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 analysed in detail. It is shown that the due to spin-orbit effects the reflected beam split in two beams gives rise to multiple reflection analogous to phenomenon 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° 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.