Theory of electronic hopping transport in disordered materials

Abstract
If unrenormalized perturbation theory is used (which means that back-and-forth hopping effects are not correlated) our results become identical to the continuous-time random-walk theory of Scher and Lax (1973), and Scher and Montroll (1975). With the help of our renormalized expression the validity of the SL theory is discussed. It is argued that the existence of anomalously dispersive transport in hopping systems is strongly dependent on the statistics of the model employed.