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Defect Fluctuations and Lifetimes in Disordered Yukawa Systems

C. Reichhardt, C. J. Olson Reichhardt

cond-mat.stat-mecharXiv:cond-mat/0605026

Abstract

We examine the time dependent defect fluctuations and lifetimes for a bidisperse disordered assembly of Yukawa particles. At high temperatures, the noise spectrum of fluctuations is white and the coordination number lifetimes have a stretched exponential distribution. At lower temperatures, the system dynamically freezes, the defect fluctuations exhibit a 1/f spectrum, and there is a power law distribution of the coordination number lifetimes. Our results indicate that topological defect fluctuations may be a useful way to characterize systems exhibiting dynamical heterogeneities.

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