Europhys. Lett.
Volume 76, Number 6, December 2006
Page(s) 1130 - 1136
Section Condensed matter: structural, mechanical and thermal properties
Published online 24 November 2006
Europhys. Lett., 76 (6), pp. 1130-1136 (2006)
DOI: 10.1209/epl/i2006-10405-1

Self-organized criticality below the glass transition

K. 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 $T_{\mbox{\scriptsize {c}}}$ but for all temperatures below $T_{\mbox{\scriptsize {c}}}$, 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.

© EDP Sciences 2006