Spin-orbit anisotropy measured using ballistic spin resonance
Mesoscale and Nanoscale Physics
2010-09-30 v1
Abstract
Spin relaxation can be greatly enhanced in narrow channels of two-dimensional electron gas due to ballistic spin resonance, which is mediated by spin-orbit interaction for trajectories that bounce rapidly between channel walls. The channel orientation determines which momenta affect the relaxation process, so comparing relaxation for two orientations provides a direct determination of spin-orbit anisotropy. Electrical measurements of pure spin currents are shown to reveal an order of magnitude stronger relaxation for channels fabricated along the [110] crystal axis in a GaAs electron gas compared to [-110] channels, believed to result from interference between structural and bulk inversion asymmetries.
Cite
@article{arxiv.1009.5702,
title = {Spin-orbit anisotropy measured using ballistic spin resonance},
author = {W. W. Yu and S. M. Frolov and S. Luescher and J. A. Folk and W. Wegscheider},
journal= {arXiv preprint arXiv:1009.5702},
year = {2010}
}