Contact resistance in percolating networks

P. Keblinski, F. Cleri

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In a large number of experiments it is observed that the electrical conductivity of percolating networks increases with filling, p, as (p-p c)2, where Pc is the percolation threshold over a very broad range of p values. Our Monte Carlo simulations, however, suggest that this power law will only be valid for p<2pc, with a crossover to a scaling exponent of 1 for higher p values. To resolve this discrepancy we postulate that the experiments are dominated by contact resistance, and in this case we show that the percolation threshold-scaling exponent of 2 holds over an entire range of p values due to the accidental merger of two different scaling laws.
Original languageEnglish
Article number184201
Pages (from-to)-
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
Publication statusPublished - May 2004
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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