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VOLUME 48 (1988) | ISSUE 10 | PAGE 550
Direct observation of resonant states associated with vacancy defects in the chalcogenide sublattice of PbTe
A 5-function singularity has been observed in the state density of the conduction band in polycrystalline samples of я-type PbTe with a slight excess of lead (— 0.1 at. %) by the method of low-temperature calorimetric spectroscopy. This singularity is interpreted as a narrow (— 0.01-е V) band of resonant states associated with vacancy defects in the anionic sublattice of the samples.