title: Plastic response and correlations in athermally sheared amorphous solids.
abstract: The onset of irreversible deformation in low-temperature amorphous solids is due to the accumulation of elementary events, consisting of spatially and temporally localized atomic rearrangements involving only a few tens of atoms. Recently, numerical and experimental work addressed the issue of spatiotemporal correlations between these plastic events. Here, we provide further insight into these correlations by investigating, via molecular dynamics (MD) simulations, the plastic response of a two-dimensional amorphous solid to artificially triggered local shear transformations. We show that while the plastic response is virtually absent in as-quenched configurations, it becomes apparent if a shear strain was previously imposed on the system. Plastic response has a fourfold symmetry, which is characteristic of the shear stress redistribution following the local transformation. At high shear rate we report evidence for a fluctuation-dissipation relation, connecting plastic response and correlation, which seems to break down if lower shear rates are considered.
authors.affiliation: Université Grenoble Alpes, LIPHY, F-38000 Grenoble, France.|CNRS, LIPHY, F-38000 Grenoble, France.
authors.forename: F
authors.initials: F
authors.lastname: Puosi
authors.affiliation: Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Rottler
authors.affiliation: Université Grenoble Alpes, LIPHY, F-38000 Grenoble, France.|CNRS, LIPHY, F-38000 Grenoble, France.|Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, F-38042 Grenoble, France.
authors.forename: J-L
authors.initials: JL
authors.lastname: Barrat