Aging and ultra-slow equilibration in concentrated colloidal hard spheres

Details Aging and ultra-slow equilibration in concentrated colloidal hard spheres Aging and ultra-slow equilibration in concentrated colloidal hard spheres

2005-06-21

arxiv.org/abs/cond-mat/0506527v1

J. Phys.: Condens. Matter 17, S3543 (2005)

Physics

Condensed Matter

Soft Condensed Matter

Submitted to the proceedings of the 6th EPS Liquid Matter Conference, Utrecht 2-6 July 2005

Scientific paper

We study the dynamic behaviour of concentrated colloidal hard spheres using Time Resolved Correlation, a light scattering technique that can detect the slow evolution of the dynamics in out-of-equilibrium systems. Surprisingly, equilibrium is reached a very long time after sample initialization, the non-stationary regime lasting up to three orders of magnitude more than the relaxation time of the system. Before reaching equilibrium, the system displays unusual aging behaviour. The intermediate scattering function decays faster than exponentially and its relaxation time evolves non-monotonically with sample age.

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