Probing an nonequilibrium Einstein relation in an aging colloidal glass

Abstract

We present a direct experimental measurement of an effective temperature in a colloidal glass of Laponite, using a micrometric bead as a thermometer. The nonequilibrium fluctuation-dissipation relation, in the particular form of a modified Einstein relation, is investigated with diffusion and mobility measurements of the bead embedded in the glass. We observe an unusual non-monotonic behavior of the effective temperature : starting from the bath temperature, it is found to increase up to a maximum value, and then decreases back, as the system ages. We show that the observed deviation from the Einstein relation is related to the relaxation times previously measured in dynamic light scattering experiments.

4 pages, 4 figures, corrected references, published in Phys. Rev. Letter

References in corpus (16)

• Analytical Solution of the Off-Equilibrium Dynamics of a Long Range Spin-Glass Model
• Energy flow, partial equilibration and effective temperatures in systems with slow dynamics
• Two-time scales, two-temperature scenario for nonlinear rheology
• Observing Brownian motion in vibration-fluidized granular matter
• Aging dynamics in a colloidal glass of Laponite
• Observation of Fluctuation-Dissipation-Theorem Violations in a Structural Glass
• Fluctuation-dissipation ratio of a spin glass in the aging regime
• Monte-Carlo simulations of the violation of the fluctuation-dissipation theorem in domain growth processes
• Violation of the Fluctuation Dissipation Theorem in Finite Dimensional Spin Glasses
• Aging properties of an anomalously diffusing particle
• Fluctuation-Dissipation-Theorem violation during the formation of a colloidal-glass
• Fluctuation dissipation ratio in an aging Lennard-Jones glass
• Observable-dependence of fluctuation-dissipation relations and effective temperatures
• Fluctuation-dissipation ratio in lattice-gas models with kinetic constraints
• Nonlinear rheology of Laponite suspensions under an external drive
• Anomalous diffusion of a particle in an aging medium

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