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

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.

19 pages, 10 figures, To appear in PRE

References in corpus (3)

• Dynamics of Highly Supercooled Liquids:Heterogeneity, Rheology, and Diffusion
• How does the relaxation of a supercooled liquid depend on its microscopic dynamics?
• Glassiness Vs. Order in Densely Frustrated Josephson Arrays

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• Is there something of the MCT in orientationally disordered crystals ?
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• Power law relaxation and glassy dynamics in Lebwohl-Lasher model near isotropic-nematic phase transition
• The Potts Fully Frustrated model: Thermodynamics, percolation and dynamics in 2 dimensions
• Structural Relaxation, Self Diffusion and Kinetic Heterogeneity in the Two Dimensional Lattice Coulomb Gas