Strong-field effects in disordered dielectrics with hopping conduction

It has been stated in a number of studies that the field dependence of differential conductivity in disordered dielectrics with hopping conduction has a minimum, an exponential rise in γ(E) being preceded by a region of conductivity decline with increasing field strength Bottger and Bryksin (1985). The present pair shows that such a behaviour of the nonohmic hopping conductivity of disordered dielectrics is due to a change in charge transport paths and electronic density redistribution, and is inherent in systems with strong electron-phonon interaction