Datta-and-Das spin transistor controlled by a high-frequency electromagnetic field

TL;DR

This paper develops a theoretical model showing how high-frequency electromagnetic fields can control spin-dependent transport in Datta-and-Das spin transistors by renormalizing spin-orbit coupling, enabling light-based control of spintronics.

Contribution

The study introduces a theoretical framework for controlling spin transport in spin transistors using high-frequency electromagnetic fields, highlighting the renormalization of spin-orbit coupling.

Findings

Electromagnetic field drastically modifies spin transport.

Dressing field renormalizes spin-orbit coupling constants.

Conductivity of the spin transistor can be controlled by light.

Abstract

We developed the theory of spin dependent transport through a spin-modulator device (so-called Datta-and-Das spin transistor) in the presence of a high-frequency electromagnetic field (dressing field). Solving the Schr\"odinger problem for dressed electrons, we demonstrated that the field drastically modifies the spin transport. In particular, the dressing field leads to renormalization of spin-orbit coupling constants that varies conductivity of the spin transistor. The present effect paves the way for controlling the spin-polarized electron transport with light in prospective spin-optronic devices.