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VOLUME 59 (1994) | ISSUE 12 | PAGE 803
Critical behavior of the conductivity of a two-component percolation system in the crossover region
This letter examines the problem of calculating the effective conductivity of a two-component system in which the components differ markedly in conductivity, and in which the volume fraction of component x, with the higher conductivity, is close to the percolation threshold xc. A critical exponent, which describes the χ dependence of the diffusion coefficient and the conductivity of the system in the limit x—>xc, is found.