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arXiv · 1310.7613

Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations

Florent Baboux·Florent Perez·Carsten A. Ullrich·Irene D'Amico·Grzegorz Karczewski·Tomasz Wojtowicz
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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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Florent Baboux, Florent Perez, Carsten A. Ullrich, Irene D'Amico, Grzegorz Karczewski, Tomasz Wojtowicz. 2013-10-28. Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations. https://doi.org/10.1103/physrevb.87.121303

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