Dynamical aspects of a three-dimensional Heisenberg spin glass

Details Dynamical aspects of a three-dimensional Heisenberg spin glass Dynamical aspects of a three-dimensional Heisenberg spin glass

2000-01-11

arxiv.org/abs/cond-mat/0001126v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 8 figures, proceedings of the US-Japan bilateral seminar on `Understanding and Conquering L ong Time Scales in Comput

Scientific paper

Spin-glass and chiral-glass orderings of a three-dimensional isotropic Heisenberg spin glass are studied both by equilibrium and off-equilibrium Monte Carlo simulations with emphasis on their dynamical aspects. The model is found to exhibit a finite-temperature chiral-glass transition without the conventional spin-glass order. Although chirality is an Ising-like quantity from symmetry, universality class of the chiral-glass transition appears to be different from that of the standard Ising spin glass. In the off-equilibrium simulation, while the spin autocorrelation exhibits only an interrupted aging, the chirality autocorrelation persists to exhibit a pronounced aging effect reminiscent of the one observered in the mean-field model.

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