title: Robustness of avalanche dynamics in sheared amorphous solids as probed by transverse diffusion.
abstract: Using numerical simulations, we perform an extensive finite-size analysis of the transverse diffusion coefficient in a sheared 2D amorphous solid over a broad range of strain rates at temperatures up to the supercooled liquid regime. We thus obtain direct qualitative evidence for the persistence of correlations between elementary plastic events up to the vicinity of the glass transition temperature T(g). A quantitative analysis of the data, combined with a previous study of the T and γ dependence of the macroscopic stress [Phys. Rev. Lett. 105, 266001 (2010)], leads us to conclude that the average avalanche size remains essentially unaffected by temperature up to T ~ 0.75T(g).
authors.affiliation: Laboratoire Navier, Université Paris Est, ENPC-ParisTech, LCPC, CNRS UMR 8205 2 allée Kepler, F-77420 Champs-sur-Marne, France.
authors.forename: Joyjit
authors.initials: J
authors.lastname: Chattoraj
authors.forename: Christiane
authors.initials: C
authors.lastname: Caroli
authors.forename: Anaël
authors.initials: A
authors.lastname: Lemaître
mesh_terms: D000465:Algorithms; D055875:Avalanches; D003198:Computer Simulation; D004058:Diffusion; D015233:Models, Statistical; D008962:Models, Theoretical; D010825:Physics / Q000379:methods; D013696:Temperature; D013997:Time Factors