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Title:

Generalizated effective-medium approximation for hopping transport in topologically disordered systems

Document type:
journal article
Author(s):
Ganter, C; Schirmacher, W
Abstract:
A generalized effective-medium approximation (EMA) for hopping transport in topologically disordered systems such as amorphous semiconductors or impurity bands of crystalline semiconductors is derived. In contrast with previous theories we are able to include the influence of closed loops in the path summation. These terms are responsible for the algebraic long-time tails of the velocity autocorrelation function which also show up as non-analytic terms in the low-frequency part of the ac conduct...     »
Journal title abbreviation:
Phil Mag B
Year:
2001
Journal volume:
81
Journal issue:
9
Pages contribution:
915-924
Language:
eng
Print-ISSN:
0141-8637
TUM Institution:
Institut für Radiologie
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