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FIELD-INDUCED SPIN EXCITATIONS IN RASHBA-DRESSELHAUS TWO-DIMENSIONAL ELECTRON SYSTEMS PROBED BY SURFACE ACOUSTIC WAVES

P. KLEINERT

Paul-Drude-Intitut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany

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and

V. V. BRYKSIN

A.F. Ioffe Physical Technical Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia

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https://doi.org/10.1142/S0217979209053242Cited by:0 (Source: Crossref)

Abstract

A spin-rotation symmetry in spin-orbit coupled two-dimensional electron systems gives rise to a long-lived spin excitation that is robust against short-range impurity scattering. The influence of a constant in-plane electric field on this persistent spin helix is studied. To probe the field-induced eigen-modes of the spin-charge coupled system, a surface acoustic wave is exploited that provides the wave-vector for resonant excitation. The approach takes advantage of methods worked out in the field of space-charge waves. Sharp resonances in the field dependence of the in-plane and out-of-plane magnetization are identified.

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