Rejuvenation and overaging in a colloidal glass under shear

Details Rejuvenation and overaging in a colloidal glass under shear Rejuvenation and overaging in a colloidal glass under shear

2002-03-15

arxiv.org/abs/cond-mat/0203328v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures, to be published in PRL

Scientific paper

10.1103/PhysRevLett.89.065701

We report the modifications of the microscopic dynamics of a colloidal glass submitted to shear. We use multispeckle diffusing wave spectroscopy to monitor the evolution of the spontaneous slow relaxation processes after the sample have been submitted to various straining. We show that high shear rejuvenates the system and accelerates its dynamics whereas moderate shear overage the system. We analyze this phenomena within the frame of the Bouchaud's trap model.

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