Journal
EUROPEAN PHYSICAL JOURNAL E
Volume 43, Issue 9, Pages -Publisher
SPRINGER
DOI: 10.1140/epje/i2020-11983-6
Keywords
Topical issue; Disordered; Non-Equilibrium Systems; From Supercooled Liquids to Amorphous Solids
Categories
Funding
- National Natural Science Foundation of China (NSFC) Basic Science Center for Multiscale Problems in Nonlinear Mechanics [11988102]
- NSFC [11972345, 11790292]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [Y201704]
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It has been accepted that low-frequency vibrational modes are causally correlated to fundamental plastic rearrangement events in amorphous solids, irrespective of the structural details. But the mode-event relationship is far from clear. In this work, we carry out case studies using atomistic simulations of a three-dimensional Cu50Zr50 model glass under athermal, quasistatic shear. We focus on the first four plastic events, and carefully trace the spatiotemporal evolution of the associated low-frequency normal modes with applied shear strain. We reveal that these low-frequency modes get highly entangled with each other, from which the critical mode emerges spontaneously to predict a shear transformation event. But the detailed emergence picture is event by event and shear-protocol dependent, even for the first plastic event. This demonstrates that the instability of a plastic event is a result of extremely complex multiple-path choice or competition, and there is a strong, elastic interaction among neighboring instability events. At last, the generality of the present findings is shown to be applicable to covalent-bonded glasses.
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