Metastable electronic states and thermoelectrical instabilities in PbTe(In) based filmsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Thermally induced currents (TIC) and instabilities of photoresponse in Pb1-x-ySnxGeyTe(In) (0.06 < x < 0.2; 0.08 < y < 0.12; 0.5% < C-In < 1%) films on BaF2 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 approximate 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.