Abstract

The electronic structure of the substitutional alkali metal impurities in InP has been studied by MSXαSCF method. The shift of the tDBH2-level for different impurities is determined. In none of the cases the impurity level is shifted out of the band gap. Li and Na impurities with their shallow acceptor levels behave as p-type semiconductors whereas K impurity with its deep level behave somewhat like a semi-insulator.

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