Abstract
<p>Metallic materials in granular packings show different electrical properties from their bulk counterparts.<br />In this paper, we investigate the temporal evolution of the electrical conductivity of granular metals. We<br />use metallic beads arranged in different one-, two- and three-dimensional ensembles through which<br />different constant currents are injected. The conductivity behavior in all three types of systems is<br />qualitatively similar. The results show the rise of conductivity which is more pronounced in the earlier<br />stages of the time evolution. We investigate the influence of the dimensionality, number of the beads,<br />and the values of the injected currents on the conductivity behavior.</p>
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