NONOHMIC HOPPING CONDUCTION.

A theory of nonohmic hopping conducting is developed for moderately strong electric fields E. A deviation from Ohm's law is predicted for a field E approximately equals E//c identical kT/eL//0, where L//0 equals l(T) zeta **v//c is the correlation radius of a critical hopping-conduction subnetwork, l(T) is the characteristic jump length, zeta //c is the argument of the exponential function in the expression for the ohmic electrical conductivity, and v approximately equals 0. 9 is the critical index of the correlation radius. A current-voltage characteristic obtained for fields E greater than E//c is of the form j(E equals sigma (T)E//c exp(eEL//0/kT)**1**/**(**1** plus **v**) and it differs considerably from the results obtained by other authors.