Abstract
AbstractThe first calculation of the electron energy spectrum of antiferromagnetic MnTe is made using Green's function method. In accordance with the experiment MnTe is found to be a semiconductor with an indirect gap ≈0.8 eV and a direct gap of ≈1.26 eV. The results obtained confirm the validity of Allen's qualitative model for the MnTe energy structure. Special moments of symmetry are discussed. The semiconductor character is shown to be connected with antiferromagnetic order. The effective masses of valence band top electrons are calculated in the kp approximation and compared with the experiment.
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