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Multiple Glassy States in a Simple Model System

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Science  05 Apr 2002:
Vol. 296, Issue 5565, pp. 104-106
DOI: 10.1126/science.1068238

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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.

  • * To whom correspondence should be addressed. E-mail: w.poon{at}ed.ac.uk

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