Partial rejuvenation of a colloidal glass

Abstract

We study the effect of shear on the aging dynamics of a colloidal suspension of synthetic clay particles. We find that a shear of amplitude $\gamma$ reduces the relaxation time measured just after the cessation of shear by a factor $\exp (-\gamma /{\gamma }_c)$, with ${\gamma }_c\sim 5$, and is independent of the duration and the frequency of the shear. This simple law for the rejuvenation effect shows that the energy involved in colloidal rearrangements is proportional to the shear amplitude, $\gamma$, rather than ${\gamma }^2$, leading to an Eyring-like description of the dynamics of our system.

5 pages, 4 figures, to appear in Phys. Rev. E

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• Temperature chaos in 3D Ising Spin Glasses is driven by rare events
• Delayed Yielding in Creep, Time - Stress Superposition and Effective Time Theory for a Soft Glass
• Aging after shear rejuvenation in a soft glassy colloidal suspension: evidence for two different regimes
• Intrinsic aging and effective viscosity in the slow dynamics of a soft glass with tunable elasticity
• Temperature chaos is present in off-equilibrium spin-glass dynamics
• Dynamic Variational Study of Chaos: Spin Glasses in Three Dimensions
• Origin of the slow dynamics and the aging of a soft glass
• Temperature chaos is a non-local effect
• Quantifying memory in spin glasses
• Decoupling between thermodynamics and dynamics during rejuvenation in colloidal glasses