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Spin-Orbit Effects in Diluted Magnetic Semiconductors

Authors :
Lee, Byounghak
Cartoixa, Xavier
Trivedi, Nandini
Martin, Richard M.
Publication Year :
2004
Publisher :
arXiv, 2004.

Abstract

We present a theoretical study of diluted magnetic semiconductors that treats the local sp-d exchange interaction J between the itinerant carriers and the Mn d electrons within a realistic band structure and goes beyond previous mean-field approaches. In case of (Ga,Mn)As, we find that strong exchange potentials tightly bind carriers near impurity sites. Spin-orbit coupling is found to have a more pronounced effect on spin polarization at weak coupling and this feature can be exploited for magnetotransport. For low doping regime, we predict that spin-orbit coupling splits impurity bands and can induce a novel insulating phase.<br />Comment: 4 pages, 5 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....4fa2c9cde68149036255d29d074b3c17
Full Text :
https://doi.org/10.48550/arxiv.cond-mat/0410051