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Anisotropic spin splitting and spin relaxation in asymmetric zinc-blende semiconductor quantum structures
Spin relaxation due to the D'yakonov-Perel' mechanism is intimately related
with the spin splitting of the electronic states. We determine the spin
relaxation rates from anisotropic spin splittings of electron subbands in
n-(001) zinc-blende semiconductor quantum structures calculated
self-consistently in the multi-band envelope function approach. The giant
anisotropy of spin relaxation rates found for different spin-components in the
(001) plane can be ascribed to the interplay between the bulk and quantum well
inversion asymmetry. One of the in-plane relaxation rates may exhibit a
striking nonmonotonous dependence on the carrier density.Comment: 6 pages, 7 figures; revised version with minor changes after
refereein
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