Abstract
We present evidence that in granular metals the observed temperature dependence of the low-field conductivity, with , can be ascribed to a relationship between , the separation of neighboring metal grains, and , 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-Si films.
- Received 23 April 1973
DOI:https://doi.org/10.1103/PhysRevLett.31.44
©1973 American Physical Society