Curie temperature of GaMnN and GaMnAs from LDA-SIC electronic structure calculations

We present the electronic structures, magnetic exchange interactions and Curie temperature (T-C) of GaMnN and GaMnAs calculated by self-interaction-corrected local-density approximation (LDA-SIC). In GaMnAs, the LDA-SIC results of T-C do not differ so much from the LDA results. Both the LDA and LDA-SIC values are in a good agreement with the experimental data. In GaMnN, on the other hand, the ferromagnetic exchange interactions are enhanced due to the suppression of antiferromagnetic super-exchange interaction, resulting in T-C higher than the LDA results.