Huge (but Finite) Time Scales in Slow Relaxations: Beyond Simple Aging
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CitationAmir, Ariel, Stefano Borini, Yuval Oreg, and Yoseph Imry. 2011. “Huge (but Finite) Time Scales in Slow Relaxations: Beyond Simple Aging.” Physical Review Letters 107 (18). https://doi.org/10.1103/physrevlett.107.186407.
AbstractExperiments performed in the last years demonstrated slow relaxations and aging in the conductance of a large variety of materials. Here, we present experimental and theoretical results for conductance relaxation and aging for the case-study example of porous silicon. The relaxations are experimentally observed even at room temperature over time scales of hours, and when a strong electric field is applied for a time t(w), the ensuing relaxation depends on t(w). We derive a theoretical curve and show that all experimental data collapse onto it with a single time scale as a fitting parameter. This time scale is found to be of the order of thousands of seconds at room temperature. The generic theory suggested is not fine-tuned to porous silicon, and thus we believe the results should be universal, and the presented method should be applicable for many other systems manifesting memory and other glassy effects.
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