Spatiotemporal Hierarchy of Relaxation Events, Dynamical Heterogeneities, and Structural Reorganization in a Supercooled Liquid

R. Candelier, A. Widmer-Cooper, J. K. Kummerfeld, O. Dauchot, G. Biroli, P. Harrowell, and D. R. Reichman
Phys. Rev. Lett. 105, 135702 – Published 24 September 2010
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Abstract

We identify the pattern of microscopic dynamical relaxation for a two-dimensional glass-forming liquid. On short time scales, bursts of irreversible particle motion, called cage jumps, aggregate into clusters. On larger time scales, clusters aggregate both spatially and temporally into avalanches. This propagation of mobility takes place along the soft regions of the systems, which have been identified by computing isoconfigurational Debye-Waller maps. Our results characterize the way in which dynamical heterogeneity evolves in moderately supercooled liquids and reveal that it is astonishingly similar to the one found for dense glassy granular media.

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  • Received 30 November 2009

DOI:https://doi.org/10.1103/PhysRevLett.105.135702

© 2010 The American Physical Society

Authors & Affiliations

R. Candelier1, A. Widmer-Cooper2, J. K. Kummerfeld3, O. Dauchot1, G. Biroli4, P. Harrowell3, and D. R. Reichman5

  • 1SPEC, CEA-Saclay, URA 2464 CNRS, 91 191 Gif-sur-Yvette, France
  • 2Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, USA
  • 3Department of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
  • 4Institut de Physique Théorique, CEA, IPhT, F-91191 Gif-sur-Yvette, France and CNRS, URA 2306
  • 5Columbia University, 3000 Broadway, New York, New York, 10027, USA

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Issue

Vol. 105, Iss. 13 — 24 September 2010

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