Crystallization Mechanism of Hard Sphere Glasses

Details Crystallization Mechanism of Hard Sphere Glasses Crystallization Mechanism of Hard Sphere Glasses

2011-04-19

arxiv.org/abs/1104.3828v1

Physical Review Letters, 2011

Physics

Chemical Physics

4 pages 4 figures Accepted for publication in Phys. Rev. Lett., April 2011

Scientific paper

In supercooled liquids, vitrification generally suppresses crystallization. Yet some glasses can still crystallize despite the arrest of diffusive motion. This ill-understood process may limit the stability of glasses, but its microscopic mechanism is not yet known. Here we present extensive computer simulations addressing the crystallization of monodisperse hard-sphere glasses at constant volume (as in a colloid experiment). Multiple crystalline patches appear without particles having to diffuse more than one diameter. As these patches grow, the mobility in neighbouring areas is enhanced, creating dynamic heterogeneity with positive feedback. The future crystallization pattern cannot be predicted from the coordinates alone: crystallization proceeds by a sequence of stochastic micro-nucleation events, correlated in space by emergent dynamic heterogeneity.

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