Volume 45, Number 1, January I 1999
|Page(s)||52 - 57|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
Aging of a colloidal “Wigner” glass
Laboratoire de Physique Statistique de l'ENS, 24 Rue Lhomond, 75231 Paris Cedex 05, France
2 Institute for Industrial Science, University of Tokyo - Minato-ku, Tokyo 106, Japan
3 Van der Waals-Zeeman Laboratory, Universiteit van Amsterdam, Valckenierstraat 65, 1081 XE, Amsterdam, The Netherlands
4 CPMOH, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, France
Accepted: 29 October 1998
We study the aging of a colloidal glass, which is obtained for extremely low volume fractions due to strong electrostatic repulsions, leading to the formation of a “Wigner glass”. During the aging, a new crossover between a complete and incomplete decay of the correlation function is observed, accompanied by an increase in the non-ergodicity parameter. The dynamics can be described as a cage-diffusion process. For short times, the escape of the particles from “cages” formed by neighbouring particles dominates; for long times the particles cannot escape anymore and the system becomes strongly non-ergodic.
PACS: 64.70.Pf – Glass transitions / 61.20.Lc – Time-dependent properties; relaxation
© EDP Sciences, 1999
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