FREQUENCY DEPENDENT EFFECTIVE CONDUCTIVITY OF TWO-DIMENSIONAL METAL–DIELECTRIC COMPOSITES

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Lotfi Zekri (zekri@thp.uni-koeln.de)
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International Journal of Modern Physics C (IJMPC), 2005, vol. 16, issue 06, pages 991-998

Abstract: We analyze a random resistor–inductor–capacitor (RLC) lattice model of two-dimensional metal–insulator composites. The results are compared with Bruggeman's and Landauer's Effective Medium Approximations where a discrepancy was observed for some frequency zones. Such a discrepancy is mainly caused by the strong conductivity fluctuations. Indeed, a two-branches distribution is observed for low frequencies. We show also by increasing the system size that at pc the so-called Drude peak vanishes; it increases for vanishing losses.

Keywords: Conductivity; composites; resistor networks; percolation (search for similar items in EconPapers)
Date: 2005
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