Universal frequency-dependent ac conductivity of conducting polymer networks

A. N. Papathanassiou; I. Sakellis; J. Grammatikakis

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arXiv · 0805.2483

Universal frequency-dependent ac conductivity of conducting polymer networks

A. N. Papathanassiou·I. Sakellis·J. Grammatikakis

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Abstract

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 does not exist a universal fractional power law (and is useless searching for a unique common critical exponent), but a qualitative universal behavior of the ac conductivity in disordered media.

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A. N. Papathanassiou, I. Sakellis, J. Grammatikakis. 2008-05-16. Universal frequency-dependent ac conductivity of conducting polymer networks. https://arxiv.org/abs/0805.2483

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