Crystallization in a dense suspension of self-propelled particles

Details Crystallization in a dense suspension of self-propelled particles Crystallization in a dense suspension of self-propelled particles

2011-12-22

arxiv.org/abs/1112.5281v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

Using Brownian dynamics computer simulations we show that a two-dimensional suspension of self-propelled ("active") colloidal particles crystallizes at sufficiently high densities. Compared to the equilibrium freezing of passive particles the freezing density is both significantly shifted and depends on the structural or dynamical criterion employed. In non-equilibrium the transition is accompanied by pronounced structural heterogeneities. This leads to a transition region between liquid and solid in which the suspension is globally ordered but unordered liquid-like "bubbles" still persist.

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