Anomalous transient-time dispersion in amorphous solids—A comment

Abstract

The random-walk non-Markoffian equations of Scher and Montroll are subjected to two approximations: first, the continuum limit is taken and second, the diffusive term, as defined in the text, is neglected (this means that the carriers are drifted by the electric field). It is shown that this approach does preserve the dispersive character of the transport process and leads to, essentially, the same results as deduced by Scher and Montroll.