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research
Spin-orbit fields in asymmetric (001)-oriented GaAs/AlxGa 1-xAs quantum wells
Authors
P.S. Eldridge
R.T. Harley
+4 more
M. Henini
Jens Hübner
S. Oertel
Michael Oestreich
Publication date
1 January 2011
Publisher
College Park, MD : American Physical Society
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Abstract
We measure simultaneously the in-plane electron g factor and spin-relaxation rate in a series of undoped inversion-asymmetric (001)-oriented GaAs/AlGaAs quantum wells by spin-quantum beat spectroscopy. In combination the two quantities reveal the absolute values of both the Rashba and the Dresselhaus coefficients and prove that the Rashba coefficient can be negligibly small despite huge conduction-band potential gradients which break the inversion symmetry. The negligible Rashba coefficient is a consequence of the "isomorphism" of conduction- and valence-band potentials in quantum systems where the asymmetry is solely produced by alloy variations. © 2011 American Physical Society
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 21/11/2017