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Rotational relaxation in Brownian rotors with frustrated interactions on a square lattice

Sung Jong Lee·Bongsoo Kim
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Abstract

We present simulation results on the equilibrium relaxation of Brownian planar rotors based on a uniformly frustrated XY model on a square lattice. The rotational relaxation exhibits typical dynamic features of fragile supercooled liquids including the two-step relaxation. We observe a dynamic cross-over from high temperature regime with Arrhenius behavior to low temperaure regime with temperature-dependent activation energy. A consistent picture for the observed slow dynamics can be given in terms of caging effect and thermal activation across potential barriers in the energy landscapes.

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Sung Jong Lee, Bongsoo Kim. 1999-05-07. Rotational relaxation in Brownian rotors with frustrated interactions on a square lattice. https://doi.org/10.1103/physreve.60.1503

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