Abstract
A comparison of experimental results and predictions of an effective-medium-theory model by Mantese, Curtin, and Webb has suggested that while the electrical conductance, in the regime where a continuous metallic network exists, is dominated by conduction within this network, the resistance noise is dominated by intergrain tunneling. A critical examination of the assumptions made in their model indicates that this suggestion is correct if the high resistance nature of the overlap regions between the individual grains is not considered. It is shown that by the consideration of these regions (which is done here within the framework of effective-medium theories) one can account for the experimental data by a viable alternative which suggests that both the resistivity and the resistance noise are dominated by the conduction throughout the continuous metallic network.
Original language | English |
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Pages (from-to) | 14915-14924 |
Number of pages | 10 |
Journal | Physical Review B |
Volume | 48 |
Issue number | 20 |
DOIs | |
State | Published - 1993 |