A dielectric state and residual photoconductivity are observed in a Pb
1-xGexTe (x = 0.06) solid solution doped simultaneously with impurity
Ga (0.3 at.%) and Yb (0.5-1 at.%). The kinetic properties and spectral
characteristics of the photoconductivity in single crystals are inves
tigated experimentally. The data are explained in terms of a model whi
ch describes a restructuring of the deep center in configuration space
. (C) 1996 American Institute of Physics.