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Dynamical Heterogeneity in the Ising Spin Glass

Published

Author(s)

S C. Glotzer, N Jan, T Lookman, A B. MacIsaac, P H. Poole

Abstract

We investigate the relationship between bulk and local relaxation in the Ising spin glass (in 2 and 3 dimensions) for temperatures above but approaching the glass transition temperature, using Monte Carlo computer simulations. We find that the stretched exponential form of the bulk spin autocorrelation function results from a spatial average over a broad range of behavior--from strongly non-exponential to nearly exponential--for the local autocorrelation functions. The spatial correlation of single-site relaxation times obtained from these functions provides a length scale for dynamical heterogeneity which grows with decreasing temperature.
Citation
Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)

Keywords

disordered materials, frustration, glasses, heteroeneous dynamics, spin glass

Citation

Glotzer, S. , Jan, N. , Lookman, T. , MacIsaac, A. and Poole, P. (2008), Dynamical Heterogeneity in the Ising Spin Glass, Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) (Accessed April 24, 2024)
Created October 16, 2008