3 years ago

Isotropic-nematic transition of self-propelled rods in three dimensions.

Abhinav Sharma, Matthieu Marechal, René Wittmann, Felix Winterhalter, Matthias C. Bott, Joseph M. Brader

Using overdamped Brownian dynamics simulations we investigate the isotropic-nematic (IN) transition of self-propelled rods in three spatial dimensions. For two well-known model systems (Gay-Berne potential and hard spherocylinders) we find that turning on activity moves to higher densities the phase boundary separating an isotropic phase from a (nonpolar) nematic phase. This active IN phase boundary is distinct from the boundary between isotropic and polar-cluster states previously reported in two-dimensional simulation studies and, unlike the latter, is not sensitive to the system size. We thus identify a generic feature of anisotropic active particles in three dimensions.

Publisher URL: http://arxiv.org/abs/1801.08790

DOI: arXiv:1801.08790v1

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