Vibrational modes identify soft spots in a sheared disordered packing

Details Vibrational modes identify soft spots in a sheared disordered packing Vibrational modes identify soft spots in a sheared disordered packing

2010-12-21

arxiv.org/abs/1012.4822v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

We analyze low-frequency vibrational modes in a two-dimensional, zero-temperature, quasistatically sheared model glass to identify a population of structural "soft spots" where particle rearrangements are initiated. The population of spots evolves slowly compared to the interval between particle rearrangements and the soft spots are structurally different from the rest of the system. Our results suggest that disordered solids flow via localized rearrangements that tend to occur at soft spots, which are analogous to dislocations in crystalline solids.

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