A pronounced nonlinearity of the current-voltage characteristics (CVC)
accompanied by a high photosensitivity to IR-illumination was observe
d in In contact-[p-PbTe(Ga)]-Pt contact structures. The experimental d
ata are discussed in terms of energy-band distortion near the Schottky
barrier taking into account that at high-ohmic state formation the Fe
rmi level (FL) is pinned by an impurity level within the energy gap. T
he possible influence of the crystal imperfections is also considered.
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