Dynamical Heterogeneities and Cooperative Motion in Smectic Liquid Crystals

Details Dynamical Heterogeneities and Cooperative Motion in Smectic Liquid Crystals Dynamical Heterogeneities and Cooperative Motion in Smectic Liquid Crystals

2009-06-17

arxiv.org/abs/0906.3093v1

Phys. Rev. Lett. 103, 248304 (2009).

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.103.248304

Using simulations of hard rods in smectic-A states, we find non-gaussian diffusion and heterogeneous dynamics due to the equilibrium periodic smectic density profiles, which give rise to permanent barriers for layer-to-layer diffusion. This relaxation behavior is surprisingly similar to that of non-equilibrium supercooled liquids, although there the particles are trapped in transient (instead of permanent) cages. Interestingly, we also find stringlike clusters of up to 10 inter-layer rods exhibiting dynamic cooperativity in this equilibrium state.

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