Spin-Orbit Effects in Diluted Magnetic Semiconductors

Details Spin-Orbit Effects in Diluted Magnetic Semiconductors Spin-Orbit Effects in Diluted Magnetic Semiconductors

2004-10-03

arxiv.org/abs/cond-mat/0410051v1

Physics

Condensed Matter

Materials Science

4 pages, 5 figures

Scientific paper

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.

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