期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.248301
关键词
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资金
- European Research Council [ADG20110209]
- Institut Universitaire de France
- Grand Equipement National de Calcul Intensif Project [t2014097236]
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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