Cooperative Behavior and Pattern Formation in Mixtures of Driven and Nondriven Colloidal Assemblies

Details Cooperative Behavior and Pattern Formation in Mixtures of Driven and Nondriven Colloidal Assemblies Cooperative Behavior and Pattern Formation in Mixtures of Driven and Nondriven Colloidal Assemblies

2006-02-06

arxiv.org/abs/cond-mat/0602118v1

Phys. Rev. E 74, 011403 (2006)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 postscript figures

Scientific paper

10.1103/PhysRevE.74.011403

We simulate a disordered assembly of particles interacting through a repulsive Yukawa potential with a small fraction of the particles coupled to an external drive. Distortions in the arrangement of the nondriven particles produce a dynamically induced effective attraction between the driven particles, giving rise to intermittent one-dimensional stringlike structures. The velocity of a moving string increases with the number of driven particles in the string. We identify the average stable string length as a function of driving force, background particle density, and particle charge. This model represents a new type of collective transport system composed of interacting particles moving through deformable disorder.

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