Kondo coupling and Curie temperature of Ga1-xMnxAs in the coherent potential approximation

The ferromagnetism of Ga1-xMnxAs is studied in the coherent potential approximation (CPA). In this work, we used the exact Hilbert transformation of the face-centered cubic (fcc) density of states (DOS), which is different from the usual semi-circle DOS employed in previous works. Using Weiss molecular theory, we obtained a nonlinear relation of Curie temperature with respect to Kondo coupling. Our calculated TC agrees very well with measured values.