Waveguide diffusion modes and slowdown of D'yakonov-Perel' spin relaxation in narrow 2-D semiconductor channels

TL;DR

This paper predicts that in narrow 2D semiconductor channels, specific waveguide diffusion modes significantly slow down D'yakonov-Perel' spin relaxation, with potential applications in spin-based transistors.

Contribution

It introduces the concept of waveguide diffusion modes that reduce spin relaxation rates in narrow 2D channels, supported by theoretical analysis and proposed experiments.

Findings

Relaxation slowdown in narrow channels due to waveguide modes

Theoretical prediction of spin propagation behavior

Potential for spintronic device applications

Abstract

We have shown that in narrow 2D semiconductor channels the D'yakonov-Perel' spin relaxation rate is strongly reduced. This relaxation slowdown appears in special waveguide diffusion modes which determine the propagation of spin density in long channels. Experiments are suggested to detect the theoretically predicted effects. A possible application is a field effect transistor operated with injected spin current.