Self-organized criticality below the glass transitionK. Vollmayr-Lee1, 2 and E. A. Baker1
1 Department of Physics and Astronomy, Bucknell University Lewisburg, PA 17837, USA
2 Institut für Theoretische Physik, Universität Göttingen Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
received 27 April 2006; accepted in final form 31 October 2006
published online 24 November 2006
We obtain evidence that the dynamics of glassy systems below the glass transition is characterized by self-organized criticality. Using molecular-dynamics simulations of a model glass-former we identify clusters of cooperatively jumping particles. We find string-like clusters whose size is power-law-distributed not only close to but for all temperatures below , indicating self-organized criticality which we interpret as a freezing in of critical behavior.
64.70.Pf - Glass transitions.
02.70.Ns - Molecular dynamics and particle methods.
61.43.Fs - Glasses.
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