Spin-Hall effect on edge magnetization and electric conductance of a 2D semiconductor strip

TL;DR

This paper investigates how the intrinsic spin-Hall effect influences edge spin polarization and electric conductance in a 2D semiconductor strip, highlighting the roles of Dresselhaus and Rashba spin-orbit interactions.

Contribution

It demonstrates the impact of Dresselhaus spin-orbit interaction, including cubic terms, on edge spin accumulation and conductance in a finite-width 2D electron gas.

Findings

Spin polarization exhibits damped oscillations with strip width.

Cubic Dresselhaus terms are essential for edge spin accumulation.

Rashba interaction shows no effect on spin accumulation or conductance.

Abstract

The intrinsic spin-Hall effect on spin accumulation and electric conductance in a diffusive regime of a 2D electron gas has been studied for a 2D strip of a finite width. It is shown that the spin polarization near the flanks of the strip, as well as the electric current in the longitudinal direction exhibit damped oscillations as a function of the width and strength of the Dresselhaus spin-orbit interaction. Cubic terms of this interaction are crucial for spin accumulation near the edges. As expected, no effect on the spin accumulation and electric conductance have been found in case of Rashba spin-orbit interaction.