Effects of disorder on ferromagnetism in diluted magnetic semiconductors.
We present results of a numerical mean-field treatment of interacting spins and carriers in doped diluted magnetic semiconductors, which takes into account the positional disorder present in these alloy systems. Within our mean-field approximation, disorder enhances the ferromagnetic transition temperature for metallic densities not too far from the metal-insulator transition. Concurrently, the ferromagnetic phase is found to have very unusual temperature dependence of the magnetization as well as specific heat as a result of disorder. Unusual spin and charge transport is implied.
Berciu
M
M
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Bhatt
R N
RN