Giant Collective Spin-Orbit Field in a Quantum Well: Fine Structure of Spin Plasmons
Abstract
We employ inelastic light scattering with magnetic fields to study intersubband spin plasmons in a quantum well. We demonstrate the existence of a giant collective spin-orbit (SO) field that splits the spin-plasmon spectrum into a triplet. The effect is remarkable as each individual electron would be expected to precess in its own momentum-dependent SO field, leading to D'yakonov-Perel' dephasing. Instead, many-body effects lead to a striking organization of the SO fields at the collective level. The macroscopic spin moment is quantized by a uniform collective SO field, five times higher than the individual SO field. We provide a momentum-space cartography of this field.
Keywords
Cite
@article{arxiv.1310.7508,
title = {Giant Collective Spin-Orbit Field in a Quantum Well: Fine Structure of Spin Plasmons},
author = {Florent Baboux and Florent Perez and Carsten A. Ullrich and Irene D'Amico and Javier Gómez and Mathieu Bernard},
journal= {arXiv preprint arXiv:1310.7508},
year = {2013}
}
Comments
5 pages, 4 figures. Supplemental material available here as an ancillary file