Multiple Glassy States in a Simple Model System

K. N. Pham,A. Puertas,J. Bergenholtz,S. Egelhaaf,A. Moussaid,P. Pusey,A. Schofield,M. Cates,M. Fuchs,W. Poon

Published 2002 in Science

ABSTRACT

Experiments, theory, and simulation were used to study glass formation in a simple model system composed of hard spheres with short-range attraction (“sticky hard spheres”). The experiments, using well-characterized colloids, revealed a reentrant glass transition line. Mode-coupling theory calculations and molecular dynamics simulations suggest that the reentrance is due to the existence of two qualitatively different glassy states: one dominated by repulsion (with structural arrest due to caging) and the other by attraction (with structural arrest due to bonding). This picture is consistent with a study of the particle dynamics in the colloid using dynamic light scattering.

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