Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations
Mesoscale and Nanoscale Physics
2013-10-30 v1 Materials Science
Abstract
Spin-orbit (SO) fields in a spin-polarized electron gas are studied by angle-resolved inelastic light scattering on a CdMnTe quantum well. We demonstrate a striking organization and enhancement of SO fields acting on the collective spin excitation (spin-flip wave). While individual electronic SO fields have a broadly distributed momentum dependence, giving rise to D'yakonov-Perel' dephasing, the collective spin dynamics is governed by a single collective SO field which is drastically enhanced due to many-body effects. The enhancement factor is experimentally determined. These results provide a powerful indication that these constructive phenomena are universal to collective spin excitations of conducting systems.
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Cite
@article{arxiv.1310.7613,
title = {Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations},
author = {Florent Baboux and Florent Perez and Carsten A. Ullrich and Irene D'Amico and Grzegorz Karczewski and Tomasz Wojtowicz},
journal= {arXiv preprint arXiv:1310.7613},
year = {2013}
}
Comments
5 pages, 4 figures