Random walk theory for dispersive transport in random media

Abstract

A continuous-time random-walk theory is developed to study dispersive transport in disordered glassy systems containing conducting states and traps distributed randomly in space. The mechanism giving rise to the dispersive nature of transport and the frequency dependent response of the system to the a.c. field has been discussed. Non existence of minimum metallic conductivity has been argued to be one of the major consequences of the dispersive transport. © 1983.