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American Physical Society, Physical Review Letters, 10(112), 2014

DOI: 10.1103/physrevlett.112.108302

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Slow Relaxation and Aging Phenomena at the Nanoscale in Granular Materials

Journal article published in 2014 by V. Y. Zaitsev, V. E. Gusev, Vincent Tournat, Patrick Richard ORCID
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This paper is available in a repository.

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Abstract

Granular matter exhibits a rich variety of dynamic behaviors, for which the role of thermal fluctuations is usually ignored. Here we show that thermal fluctuations can pronouncedly affect contacting nanoscale asperities at grain interfaces and brightly manifest themselves through the influence on nonlinear-acoustic effects. The proposed mechanism based on intrinsic bistability of nanoscale contacts comprises a wealth of slow-dynamics regimes including slow relaxations and aging as universal properties of a wide class of systems with metastable states.