Impurity interaction and the metal-non-metal transition in extrinsic semiconductors
- 1 December 1979
- journal article
- other
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 40 (6) , 513-518
- https://doi.org/10.1080/01418637908226776
Abstract
The problem of interaction between randomly distributed impurities in semiconductors is discussed and a‘cluster’model of the metal—non-metal transition is proposed. This might help to resolve the recent controversy about the origin of the far-infra-red absorption in uncompensated, highly doped semiconductors, and to understand the role of disorder in the transition from local to non-local behaviour in random systems. It is shown, in particular, that the impurity interaction gives rise to a pronounced tail on the high-energy side of the lower Hubbard band.Keywords
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