Abstract

α-In2Te3, s-In2Te3, and Ga2Te3 crystals doped with iron or tin are studied. Both, iron and tin are found in divalent states in s-In2Te3 and Ga2Te3 by Mossbauer spectroscopy. Their electrical inactivity is explained by a compensation effect of In+ or Ga+ ions which pins the Fermi level to the middle of the energy gap. In α-In2Te3 doped with iron or tin some impurity enriched regions which results in an additional conductivity at low temperature are found. [Russian Text Ignored]

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