Control of spin dynamics in a two-dimensional electron gas by electromagnetic dressing

A. A. Pervishko, O. V. Kibis, S. Morina, I. A. Shelykh

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28 Citations (Scopus)

Abstract

We solved the Schrödinger problem for a two-dimensional electron gas (2DEG) with the Rashba spin-orbit interaction in the presence of a strong high-frequency electromagnetic field (dressing field). The found eigenfunctions and eigenenergies of the problem are used to describe the spin dynamics of the dressed 2DEG within the formalism of the density matrix response function. Solving the equations of spin dynamics, we show that the dressing field can switch the spin relaxation in the 2DEG between the cases corresponding to the known Elliott-Yafet and D'yakonov-Perel' regimes. As a result, the spin properties of the 2DEG can be tuned by a high-frequency electromagnetic field. The present effect opens an unexplored way for controlling the spin with light and, therefore, forms the physical prerequisites for creating light-tuned spintronics devices.

Original languageEnglish
Article number205403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number20
DOIs
Publication statusPublished - 3 Nov 2015

Bibliographical note

Publisher Copyright:
© 2015 American Physical Society.

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