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Statut |
Confirmé |
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Série |
LPS/ENS |
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Domaines |
physics |
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Date |
Mercredi 13 Avril 2011 |
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Heure |
11:00 |
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Institut |
LPS/ENS |
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Salle |
Conf. IV |
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Nom de l'orateur |
Martens |
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Prenom de l'orateur |
Kirsten |
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Addresse email de l'orateur |
kirsten [dot] martens [at] univ-lyon1 [dot] fr |
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Institution de l'orateur |
Laboratoire de Physique de la Matière Condensée et Nanostrctures, Lyon 1 |
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Titre |
Cooperativity and diffusion in sheared amorphous media |
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Résumé |
It is a well accepted point of view that the flow of amorphous media is
realized via local plastic events that correspond to small
rearrangements in the disordered structure. When such materials are
actively deformed, the local plastic events will organize into
avalanches, that span the whole system in the limit of small strain
rates.
In this talk I will describe how this cooperative behavior influences
diffusion in the sheared material and I will show a direct relation
between the diffusion coefficient and the dynamical susceptibility.
Considering experiments this means that the measure of the often more
easily accessible diffusion coefficient of tracer particles in a sheared
disordered material can provide detailed inside into its microscopic
rheology.
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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