Role of fluctuations in the yielding transition of two-dimensional glasses

Misaki Ozawa (1) , Ludovic Berthier (2, 3) , Giulio Biroli (4) , Gilles Tarjus (5)

1 LPENS - Laboratoire de physique de l'ENS - ENS Paris
2 L2C - Laboratoire Charles Coulomb
3 CAM - University of Cambridge [UK]
4 Systèmes Désordonnés et Applications
5 LPTMC - Laboratoire de Physique Théorique de la Matière Condensée

We numerically study yielding in two-dimensional glasses which are generated with a very wide range of stabilities by swap Monte-Carlo simulations and then slowly deformed at zero temperature. We provide strong numerical evidence that stable glasses yield via a nonequilibrium discontinuous transition in the thermodynamic limit. A critical point separates this brittle yielding from the ductile one observed in less stable glasses. We find that two-dimensional glasses yield similarly to their three-dimensional counterparts but display larger sample-to-sample disorder-induced fluctuations, stronger finite-size effects, and rougher spatial wandering of the observed shear bands. These findings strongly constrain effective theories of yielding.

Domaines: Systèmes désordonnés et réseaux de neurones [cond-mat.dis-nn]; Science des matériaux [cond-mat.mtrl-sci]; Mécanique des solides [physics.class-ph]

Misaki Ozawa, Ludovic Berthier, Giulio Biroli, Gilles Tarjus. Role of fluctuations in the yielding transition of two-dimensional glasses. Physical Review Research, 2020, 2 (2), pp.023203. ⟨10.1103/PhysRevResearch.2.023203⟩. ⟨hal-02880608⟩