Laurson, LasseMiguel López, María del CarmenAlava, Mikko J.2018-10-232018-10-2320100031-9007https://hdl.handle.net/2445/125547Dislocation assemblies exhibit a jamming or yielding transition at a critical external shear stress value ¼ c. Here we study the heterogeneous and collective nature of dislocation dynamics within a crystal plasticity model close to c, by considering the first-passage properties of the dislocation dynamics. As the transition is approached in the moving phase, the first-passage time distribution exhibits scaling, and a related peak dynamical susceptibility 4 diverges as 4 ð cÞ , with 1:1. We relate this scaling to an avalanche description of the dynamics. While the static structural correlations are found to be independent of the external stress, we identify a diverging dynamical correlation length y in the direction perpendicular to the dislocation glide motion.4 p.application/pdfeng(c) American Physical Society, 2010Dislocacions en cristallsResistència de materialsCristal·lografiaDislocations in crystalsStrength of materialsCrystallographyinfo:eu-repo/semantics/article5928822018-10-23info:eu-repo/semantics/openAccess