Modern Physics Letters B 23, 3171 - 3177 (2009)

SCI

Curie Temperature of the Two-Band Model for Diluted Magnetic Semiconductors in Coherent Potential Approximation

Hoang Anh Tuan

Coherent potential approximation (CPA) is extended to a two-band model for diluted magnetic semiconductors (DMS). The magnetic transition temperature Tc as a function of magnetic coupling constants, hopping parameters and carrier densities is calculated by minimizing the free energy of the coupled carrier-localized spin system. It is shown that Tc can be substantially raised by considering multiband systems.