Hole-hole correlation effects on magnetic properties of Mn${}_x$III${}_{1-x}$V diluted magnetic semiconductors

Abstract

The mean-field theory represents a useful starting point for studying carrier-induced ferromagnetism in Mn${}_x$III${}_{1-x}$V diluted magnetic semiconductors. A detail description of these systems requires to include correlations in the many-body hole system. We discuss the effects of correlations among itinerant carriers on magnetic properties of bulk Mn${}_x$III${}_{1-x}$V and magnetic semiconductor quantum wells. Presented results were obtained using parabolic band approximation and we also derive a many-body perturbation technique that allows to account for hole-hole correlations in realistic semiconductor valence bands.

4 pages, 2 figures, to appear in Physica E

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