Ac transport studies in polymers by a resistor network and transfer matrix approaches: application to polyaniline

Details Ac transport studies in polymers by a resistor network and transfer matrix approaches: application to polyaniline Ac transport studies in polymers by a resistor network and transfer matrix approaches: application to polyaniline

1998-11-24

arxiv.org/abs/cond-mat/9811335v1

Physics

Condensed Matter

Statistical Mechanics

LaTeX file, 15 pages, 5 ps figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.59.905

A statistical model of resistor network is proposed to describe a polymer structure and to simulate the real and imaginary components of its ac resistivity. It takes into account the polydispersiveness of the material as well as intrachain and interchain charge transport processes. By the application of a transfer matrix technique, it reproduces ac resistivity measurements carried out with polyaniline films in different doping degrees and at different temperatures. Our results indicate that interchain processes govern the resistivity behavior in the low frequency region while, for higher frequencies, intrachain mechanisms are dominant.

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