FUNDAMENTAL-CONCEPTS IN THE PHYSICS OF AMORPHOUS-SEMICONDUCTORS

We review some of the fundamental concepts which have been introduced into the field of amorphous semiconductors by Professor Sir Nevill Mot t. These include the 8-N rule, variable range hopping, the Austin-Mott ac conductivity, the mobility edge, and the minimum metallic conducti vity. We demonstrate that there are still severe problems, although th ere is no real alternative to Mott's concepts. (C) 1998 Elsevier Scien ce B.V. All rights reserved.