Publication : t09/224
Spatiotemporal Hierarchy of Relaxation Events, Dynamical Heterogeneities, and Structural Reorganization in a Supercooled Liquid
Candelier R. (CEA, IRAMIS, SPEC (Service de Physique de lEtat Condensé), F-91191 Gif-sur-Yvette, FRANCE)Widmer-Cooper A. (Materials Sciences Division,Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA)
Kummerfeld J.K. (Department of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia)
Dauchot O. (CEA, IRAMIS, SPEC (Service de Physique de lEtat Condensé), F-91191 Gif-sur-Yvette, FRANCE)
Biroli G. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Harrowell P. (Department of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia)
Reichman D.R. (Columbia University, 3000 Broadway, New York, New York, 10027, USA)
Abstract:Année de publication : 2010
We identify the pattern of microscopic dynamical relaxation for a two dimensional glass forming liquid. On short timescales, 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, or dynamic facilitation, 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.
Revue : Phys. Rev. Lett. 105 135702 (2010)
DOI : 10.1103/PhysRevLett.105.135702
Preprint : arXiv:0912.0193v1
Langue : Anglais
Fichier(s) à télécharger :
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