期刊
SOLID STATE COMMUNICATIONS
卷 152, 期 7, 页码 612-615出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2012.01.018
关键词
Meyer-Neldel rule (MNR); Variable-range hopping; Mott's T-1/4 law; Hopping Meyer-Neldel rule
资金
- Council of Scientific and Industrial Research, New Delhi
A Meyer-Neldel rule (MNR)-type relationship is found to exist between the slope (activation energy) and the intercept (prefactor), in the T-1/4 plot of hopping conductivity. This new relation (hopping MNR) is obeyed by a large number of systems, including those obeying the conventional MNR. Further, all the materials lie on a single straight line on the hopping MNR plot. Hopping in the exponentially rising density of localized states can give such a relationship in amorphous semiconductors. This may be used to roughly estimate a parameter, e.g., the density of states at the Fermi level or its slope, if either is known from some other experiment. However, like conventional MNR, a general explanation is missing for hopping MNR also. (C) 2012 Elsevier Ltd. All rights reserved.
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