2003/05/16 by Virgile Viasnoff, Viasnoff, Virgile, François Lequeux +2
Computer Science · Engineering · Environmental Science · Materials Science · Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #Ecosystem dynamics and resilience #FOS: Physical sciences #Material Dynamics and Properties #Nonlinear Dynamics and Pattern Formation #Slime Mold and Myxomycetes Research #Soft Condensed Matter (cond-mat.soft) #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.cond-mat/0305389
Submitted to PRE
arxiv created 2003/05/16 · openalex publication_date 2003/05/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we analyze the changes in the microscopic dynamics of a colloidal glass submitted to an oscillatory shear. We use Multispeckle diffusing Wave Spectroscopy to monitor the transient dynamical regimes following a shear application. We show that the system displays a spontaneous aging that is amplified by a low amplitude oscillation (overaging) but stopped by a high amplitude one (rejuvenation). Intermediate amplitudes drive the system into a dynamical state that cannot be reached through spontaneous evolution. We demonstrate that theses systems present a weak long term memory and that the all observed phenomenology can be explained by a broadening of the relaxation time distribution under oscillatory strain. We discussed the similarities of our results with the behavior of spin glasses upon temperature shifts. We eventually propose a scenario based on the existence of harder and softer regions in the material.