Relaxation in yield stress systems through elastically interacting activated events.

Abstract

We study consequences of long-range elasticity in thermally assisted dynamics of yield stress materials. Within a two-dimensional mesoscopic model we calculate the mean-square displacement and the dynamical structure factor for tracer particle trajectories. The ballistic regime at short time scales is associated with a compressed exponential decay in the dynamical structure factor, followed by a subdiffusive crossover prior to the onset of diffusion. We relate this crossover to spatiotemporal correlations and thus go beyond established mean field predictions.

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Cite this paper

@article{Ferrero2014RelaxationIY, title={Relaxation in yield stress systems through elastically interacting activated events.}, author={Ezequiel E. Ferrero and Kirsten Martens and J L Barrat}, journal={Physical review letters}, year={2014}, volume={113 24}, pages={248301} }