Session H29: Glassy Dynamics and Jamming I

8:00 AM–11:00 AM, Tuesday, March 6, 2007
Colorado Convention Center Room: 303

Sponsoring Unit: DFD
Chair: Karin Dahmen, University of Illinois at Urbana-Champaign

Abstract ID: BAPS.2007.MAR.H29.12

Abstract: H29.00012 : Self-Organized Criticality Below The Glass Transition: A Computer Simulation

10:12 AM–10:24 AM

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  Katharina Vollmayr-Lee
    (Bucknell University)

  Elizabeth A. Baker
    (Emory University)

We obtain evidence that the dynamics of a glassy system below the glass transition is characterized by self-organized criticality. To investigate the dynamics of a binary Lennard-Jones system we use molecular dynamics simulations. To study cooperative motion we define single particle jump events via single particle trajectories and identify clusters of jump events which are correlated in space and time. We find string-like clusters whose size is power-law distributed not only close to $T_{{\mbox{\scriptsize {c}}}}$ but for {\em all} temperatures below $T_{{\mbox{\scriptsize {c}}}}$, indicating self-organized criticality which is suggestive of a freezing in of critical behavior.

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