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Title: Experimental signatures of a nonequilibrium phase transition governing the yielding of a soft glass
Authors: Nagamanasa, K. Hima
Gokhale, Shreyas
Sood, A. K.
Ganapathy, Rajesh
Keywords: Fluids & Plasmas Physics
Mathematical Physics
Self-Organized Criticality
Crystal Plasticity
Colloidal Crystals
Video Microscopy
Issue Date: 2014
Publisher: American Physical Society
Citation: Nagamanasa, KH; Gokhale, S; Sood, AK; Ganapathy, R, Experimental signatures of a nonequilibrium phase transition governing the yielding of a soft glass. Physical Review E 2014, 89 (6), 62308
Physical Review E
Abstract: We present direct experimental signatures of a nonequilibrium phase transition associated with the yield point of a prototypical soft solid-a binary colloidal glass. By simultaneously quantifying single-particle dynamics and bulk mechanical response, we identified the threshold for the onset of irreversibility with the yield strain. We extracted the relaxation time from the transient behavior of the loss modulus and found that it diverges in the vicinity of the yield strain. This critical slowing down is accompanied by a growing correlation length associated with the size of regions of high Debye-Waller factor, which are precursors to yield events in glasses. Our results affirm that the paradigm of nonequilibrium critical phenomena is instrumental in achieving a holistic understanding of yielding in soft solids.
Description: Restricted Access
ISSN: 1539-3755
Appears in Collections:Research Articles (Rajesh Ganapathy)

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