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Transition vitreuse, hétérogénéité dynamique et vieillissement dans les systèmes a dynamique lente
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Activity statistics in a colloidal glass former: experimental evidence for a dynamical transition 
Auteur(s): Abou Bérengère, Colin Rémy, Lecomte Vivien, Pitard E., van Wijland Frédéric
(Article) Publié:
The Journal Of Chemical Physics, vol. 148 p.164502 (2018)
Texte intégral en Openaccess : 
Ref HAL: hal-01517340_v1
Ref Arxiv: 1705.00855
DOI: 10.1063/1.5006924
WoS: 000431291900023
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
5 Citations
Résumé: In a dense colloidal suspension at a volume fraction slightly lower than that of its glass transition, we follow the trajectories of an assembly of tracers over a large time window. We define a local activity, which quantifies the local tendency of the system to rearrange. We determine the statistics of the time and space integrated activity, and we argue that it develops a low activity tail that comes on a par with the onset of glassy behavior and heterogeneous dynamics. These rare events may be interpreted as the reflection of an underlying dynamic phase transition.
Commentaires: 10 pages, 15 figures
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