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Rashba conduction band spin-splitting for asymmetric quantum well potentials

Rashba conduction band spin-splitting for asymmetric quantum well potentials
Rashba conduction band spin-splitting for asymmetric quantum well potentials
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).
Rashba, Spin dynamics
1557-1939
157-159
Eldridge, P. S.
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Leyland, W. J. H.
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Mar, J. D.
61ff148e-12e0-4d87-86dd-5f11b386bebd
Lagoudakis, P. G.
ea50c228-f006-4edf-8459-60015d961bbf
Winkler, R.
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Karimov, O. Z.
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Henini, M.
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Taylor, D.
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Phillips, R. T.
d23a75c7-986b-4a83-87e4-e22abae5ade2
Harley, R. T.
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Eldridge, P. S.
62739b3b-14eb-4a0b-8e6d-4d4f24cc836d
Leyland, W. J. H.
e6a7d9aa-be90-41ef-90db-bc411363b84b
Mar, J. D.
61ff148e-12e0-4d87-86dd-5f11b386bebd
Lagoudakis, P. G.
ea50c228-f006-4edf-8459-60015d961bbf
Winkler, R.
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Karimov, O. Z.
e5137e05-4b16-484e-aae8-952a6fd69da4
Henini, M.
dffaac17-caab-4a18-9eb6-c858d8bb1ed2
Taylor, D.
cfa866c4-3420-44a6-9b2b-23b25b699dd0
Phillips, R. T.
d23a75c7-986b-4a83-87e4-e22abae5ade2
Harley, R. T.
54613031-f60f-45f4-9b20-e49bcfd53b77

Eldridge, P. S., Leyland, W. J. H., Mar, J. D., Lagoudakis, P. G., Winkler, R., Karimov, O. Z., Henini, M., Taylor, D., Phillips, R. T. and Harley, R. T. (2010) Rashba conduction band spin-splitting for asymmetric quantum well potentials. Journal of Superconductivity and Novel Magnetism, 23 (1), 157-159. (doi:10.1007/s10948-009-0546-x).

Record type: Article

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).

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More information

Published date: January 2010
Keywords: Rashba, Spin dynamics

Identifiers

Local EPrints ID: 430490
URI: http://eprints.soton.ac.uk/id/eprint/430490
ISSN: 1557-1939
PURE UUID: 003183c0-232c-4f29-9996-97e09be47c21

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Date deposited: 02 May 2019 16:30
Last modified: 02 May 2019 16:30

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