Rashba Conduction Band Spin-Splitting for Asymmetric Quantum Well Potentials |
| |
| Authors: | P S Eldridge W J H Leyland J D Mar P G Lagoudakis R Winkler O Z Karimov M Henini D Taylor R T Phillips R T Harley |
| |
| Affiliation: | 1.School of Physics and Astronomy,University of Southampton,Southampton,UK;2.Cavendish Laboratory,Cambridge,UK;3.Department of Physics,Northern Illinois University,DeKalb,USA;4.School of Physics and Astronomy,University of Nottingham,Nottingham,UK |
| |
| Abstract: | Asymmetric quantum well potentials are expected to produce a conduction band spin-splitting which contributes to Dyakonov–Perel
(Sov. Phys. Solid State 13:3023, 1971) spin relaxation. Much experimental work has focused on the effect of an electric field on spin dynamics (Karimov et al.,
in Phys. Rev. Lett. 91:246601, 2003) and little on asymmetry from alloy engineering. By combining time-resolved Kerr rotation measurements with transient spin
grating measurements in GaAs/AlGaAs quantum wells we have compared the conduction band spin-splitting resulting from asymmetric
alloy engineering with that from applied electric field. The latter is easily measurable, whilst the former is no greater
than that in symmetric wells. These results are consistent with an envelope function approximation model that considers the
potential profile in both the conduction and the valence bands (Winkler, in Springer Tracts in Modern Physics, vol. 191, 2003). |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
