Electrical conductivity of non-homogeneous Au films on glass

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Abstract
The sheet resistance has been measured at room temperature for non-homogeneous thin gold films deposited on a glass substrate. A non-ohmic behaviour is observed when the applied electric field exceeds a certain critical value which varies strongly with surface coverage. An effective two-phase conductivity model gives a good qualitative account of the observed sheet resistance and the critical field as a function of the amount of metal deposited.