Theory of hydrogen complexes in Mn xGa1-xAs dilute magnetic semiconductors
AUTOR(ES)
Giannozzi, P., Filippone, F., Bonapasta, A. Amore
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2006-06
RESUMO
Atomic hydrogen diffuses in semiconductor lattices and binds to impurities by forming complexes that can lead to a full neutralization of the impurity effects. In the present paper, the structural, vibrational, electronic and magnetic properties of complexes formed by H in the Mn xGa1-xAs (x=0.03) dilute magnetic semiconductor have been investigated by using first-principles DFT-LSD and LDA+U theoretical methods. The results account for recent experimental findings showing a H passivation of the electronic and magnetic properties of Mn in GaAs. Moreover, they show that electron correlation has crucial effects on the properties of H-Mn complexes.
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