Predicting plasticity with soft vibrational modes: From dislocations to glasses

TitlePredicting plasticity with soft vibrational modes: From dislocations to glasses
Publication TypeJournal Article
Year of Publication2014
AuthorsRottler, Jörg, Samuel S. Schoenholz, and Andrea J. Liu
JournalPhysical Review E
Volume89
Pagination042304
AbstractWe show that quasilocalized low-frequency modes in the vibrational spectrum can be used to construct soft spots, or regions vulnerable to rearrangement, which serve as a universal tool for the identification of flow defects in solids. We show that soft spots not only encode spatial information, via their location, but also directional information, via directors for particles within each soft spot. Single crystals with isolated dislocations exhibit low-frequency phonon modes that localize at the core, and their polarization pattern predicts the motion of atoms during elementary dislocation glide in two and three dimensions in exquisite detail. Even in polycrystals and disordered solids, we find that the directors associated with particles in soft spots are highly correlated with the direction of particle displacements in rearrangements.
URLhttp://link.aps.org/doi/10.1103/PhysRevE.89.042304
DOI10.1103/PhysRevE.89.042304
Website development by Checkmark Media. Designed by Armada.

a place of mind, The University of British Columbia

Faculty of Science
Department of Physics and Astronomy
6224 Agricultural Road
Vancouver, BC V6T 1Z1
Tel 604.822.3853
Fax 604.822.5324

Emergency Procedures | Accessibility | Contact UBC | © Copyright The University of British Columbia