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Cooperative jumps and hop-back motion in supercooled liquids near the glass transition in binary colloids

Sanyal, S and Sood, AK (1996) Cooperative jumps and hop-back motion in supercooled liquids near the glass transition in binary colloids. In: Europhysics Letters, 34 (5). pp. 361-366.

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Abstract

Brownian Dynamics simulations on binary charged colloids have been performed to get a liquid to crystal (at volume fraction $\phi=0.2)$ or glass $(\phi= 0.3)$ as the temperature is lowered. The subdiffusive and staircase behaviours of the mean-squared displacements as well as the behaviour of van-Hove self-correlation functions for the supercooled liquid with $\phi=0.3$ indicate strongly cooperative particle motion. The van-Hove distinct correlations follow a factorization property predicted by the mode-coupling theory. Most interestingly, a few particles show an interconnected cooperative hop and subseqent hop-back motion very close to the glass transition.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 14 Mar 2007
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ernet.in/id/eprint/9726

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