Non-gaussian electrical fluctuations in a quasi-2d packing of metallic beads
N. Vandewalle, C. Lenaerts, S. Dorbolo
Abstract
The electrical properties of a two-dimensional packing of metallic beads are studied. Small mechanical perturbations of the packing leads to giant electrical fluctuations. Fluctuations are found to be non-gaussian and seem to belong to Levy stable distributions. Anticorrelations have been also found for the sign of these fluctuations.
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