Universal frequency-dependent ac conductivity of conducting polymer networks

By A. Papathanassiou, I. Sakellis, J. Grammatikakis. 2007

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A model based on the aspect of the distribution of the length of conduction paths accessible for electric charge flow reproduces the universal power-law dispersive ac conductivity observed in polymer networks and, generally, in disordered matter. Power exponents larger than unity observed in some cases are physically acceptable within this model. A saturation high frequency region is also predicted, in agreement with experimental results. There exists not a “universal fractional power law” (and it is useless searching for a unique common critical exponent) but a qualitative universal behavior of the ac conductivity in disordered media.

Subfields: Electrochemistry, Nuclear and High Energy Physics, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/92fca81cf4cf20a62fa2e308adaed0899a8183b6