Glassy Relaxation and Breakdown of the Stokes-Einstein Relation in the Two Dimensional Lattice Coulomb Gas of Fractional Charges

Details Glassy Relaxation and Breakdown of the Stokes-Einstein Relation in the Two Dimensional Lattice Coulomb Gas of Fractional Charges Glassy Relaxation and Breakdown of the Stokes-Einstein Relation in the Two Dimensional Lattice Coulomb Gas of Fractional Charges

1998-10-13

arxiv.org/abs/cond-mat/9810149v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 6 figures, submitted to the Europhys. Lett

Scientific paper

We present Monte Carlo simulation results on the equilibrium relaxation of the two dimensional lattice Coulomb gas with fractional charges, which exhibits a close analogy to the primary relaxation of fragile supercooled liquids. Single particle and collective relaxation dynamics show that the Stokes-Einstein relation is violated at low temperatures, which can be characterized by a fractional power law relation between the self-diffusion coefficient and the characteristic relaxation time. The microscopic spatially heterogeneous structure responsible for the violation is identified.

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