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Hopping Conductivity in Granular Metals

Authors Sheng, Ping View this author's profile
Abeles, Benjamin
Arie, Y.
Issue Date 1973
Source Physical Review Letters , v. 31, (1), July 1973, p. 44-47
Summary We present evidence that in granular metals the observed temperature dependence of the low-field conductivity, exp(−b/Tα) with α=1/2, can be ascribed to a relationship sEc=const between s, the separation of neighboring metal grains, and Ec, the electrostatic energy required to create a positive-negative charged pair of grains. This relationship results from simple considerations of the structure of granular metals. The predictions of the theory, for both the high- and the low-field electrical conductivity, are in excellent accord with experimental results in granular Ni-SiO2 films.
ISSN 0031-9007
Rights © 1973 American Physical Society
Language English
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