Abstract

The behavior of frequency-dependent electrical conductivity and permittivity close to the percolation threshold of a two-component system is interpreted in terms of formation of polydispersed fractal clusters. We derive an explicit form of the scaling function for the complex conductivity and its limit of validity. The measurements performed on two water-in-oil microemulsion systems are very well accounted for and show the expected scaling behavior. Stretched exponential behavior of the polarization correlation function is also obtained.

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