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- W2040965562 abstract "We have investigated the mechanisms of electrical conduction of polymer--copper-particle composites in the low-particle-concentration limit (dilute limit) by electrical-noise measurements. The 1/f flicker noise, observed close to the percolation threshold, has been studied as a function of the current through the sample, frequency (${10}^{mathrm{ensuremath{-}}2}$--${10}^{4}$ Hz), and resistance (${10}^{1}$--${10}^{9}$ ensuremath{Omega}). In this paper we relate the total resistance noise measured on the samples to the local noise due to the different contacts between the particles. The resistance and noise power of the inhomogeneous medium is modeled by an extended effective-medium theory that includes a transition between two different conduction mechanisms near the percolation threshold. This model gives support to our hypothesis that the noise is produced by small electrical contacts between the particles, as well as the node-link picture introduced to characterize the conductive backbone preexisting at the percolation transition in the continuous percolation models." @default.
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- W2040965562 date "1990-08-15" @default.
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- W2040965562 title "Electrical-conduction mechanisms in polymer–copper-particle composites. II. (1/<i>f</i>)-noise measurements in the percolation limit" @default.
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- W2040965562 doi "https://doi.org/10.1103/physrevb.42.3386" @default.
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