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Correlated Doping in Semiconductors: The Role of Donors in III-V Diluted Magnetic Semiconductors

J. Masek, I. Turek, V. Drchal, J. Kudrnovsky, F. Maca

cond-mat.mtrl-sciarXiv:cond-mat/0302176

Abstract

We investigate the compositional dependence of the total energy of the mixed crystals (Ga,Mn)As co-doped with As, Sn, and Zn. Using the ab initio LMTO-CPA method we find a correlation between the incorporation of acceptors (Mn, Zn) and donors (Sn, antisite As). In particular, the formation energy of AsGa is reduced by approx. 0.1 eV in the presence of Mn, and vice versa. This leads to the self-compensating behavior of (Ga,Mn)As.

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