Conductivity of granular metallic films
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The electrical resistivity of granular metallic films with a granule size R ∼ 10–50 Å decomposes into two factors. One of them depends only on the ratio (T 0(x)/T) and varies in a range of six to seven orders of magnitude. The second factor depends on the volume concentration of metallic granules x and the concentration of the solution of isolated metal atoms in their oxide and varies in a range of five to six orders of magnitude. Expressions for both factors have been obtained. The conductivity of the granular films is related to tunneling between neighboring granules. The tunneling probability depends substantially on the concentration of the solution of isolated metal atoms in the oxide.
PACS numbers72.90.+y 73.40.Ns
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