Abstract
An effective Hamiltonian for the hybridization-induced hole-ion interaction, reported previously, is used to calculate the valence-band Zeeman splitting in cubic V-, Cr-, Ni- and Cu-based diluted magnetic semiconductors (DMS). The orbital coupling terms predicted for these systems lead to drastic modifications of the band splitting expected from the usual spin-exchange model. In V-based DMS we obtain a highly asymmetric splitting. But, in the case of Cr static Jahn-Teller distortion tends to quench the orbital effects, in agreement with experiment in Zn 1− x Cr x Se. For Ni-based DMS a sign reversal of the m = ± 1 2 subbands is predicted. The splitting vanishes in Cu-based DMS.
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