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Metastable Electronic States and Thermoelectrical Instabilities in PbTe7(In) Based Films
Author(s) -
Akimov B.A.,
Bogoyavlenskiy V.A.,
Ryabova L.I.,
Vasilikov V.N.
Publication year - 1998
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199812)210:2<787::aid-pssb787>3.0.co;2-q
Subject(s) - metastability , impurity , excitation , materials science , thermal , condensed matter physics , charge carrier , charge (physics) , analytical chemistry (journal) , atomic physics , physics , optoelectronics , chemistry , thermodynamics , chromatography , quantum mechanics
Thermally induced currents (TIC) and instabilities of photoresponse in Pb 1— x — y Sn x Ge yTe(In) (0.06 < x < 0.2; 0.08 < y < 0.12; 0.5% < C In < 1%) films on BaF 2 substrates have been investigated at temperatures 4.2 K < T < 30 K. The temperature T M corresponding to maximum values of single TIC peaks appears to be extremely low varying from 6 K up to 14 K. The combined effect of lighting and slight heating of the sample from 4.2 K up to ≈ 6 K results in photoresponse instabilities depending on the experimental regime. The results are interpreted in terms of thermal excitation of charge carriers from metastable impurity level.