%0 Journal Article
%T Superdiffusive, heterogeneous, and collective particle motion near the jamming transition in athermal disordered materials
%+ Laboratoire de Physique de la Matière Condensée et Nanostructures (LPMCN)
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%A Heussinger, Claus
%A Berthier, Ludovic
%A Barrat, Jean-Louis
%< avec comité de lecture
%Z LCVN:10-001
%@ 0295-5075
%J EPL - Europhysics Letters
%I European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing
%V 86
%P 10001
%8 2009-04-08
%D 2009
%Z 1001.0914
%R 10.1209/0295-5075/90/20005
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X We use computer simulations to study the microscopic dynamics of an athermal assembly of soft particles near the fluid-to-solid, jamming transition. Borrowing tools developed to study dynamic heterogeneity near glass transitions, we discover a number of original signatures of the jamming transition at the particle scale. We observe superdiffusive, spatially heterogeneous, and collective particle motion over a characteristic scale which displays a surprising non-monotonic behavior across the transition. In the solid phase, the dynamics is an intermittent succession of elastic deformations and plastic relaxations, which are both characterized by scale-free spatial correlations and system size dependent dynamic susceptibilities. Our results show that dynamic heterogeneities in dense athermal systems and glass-formers are very different, and shed light on recent experimental reports of `anomalous' dynamical behavior near the jamming transition of granular and colloidal assemblies.
%G English
%2 https://hal.science/hal-00444459/document
%2 https://hal.science/hal-00444459/file/chi14-hal.pdf
%L hal-00444459
%U https://hal.science/hal-00444459
%~ CNRS
%~ UNIV-LYON1
%~ UNIV-MONTP2
%~ LCVN
%~ UNIV-MONTPELLIER
%~ UDL
%~ UNIV-LYON
%~ UM1-UM2