Abstract:
:A crystalline solid exhibits thermally induced localised non-affine droplets in the absence of external stress. Here we show that upon an imposed shear, the size of these droplets grow until they percolate at a critical strain, well below the value at which the solid begins to yield. This critical point does not manifest in most thermodynamic or mechanical properties, but is hidden and reveals itself in the onset of inhomogeneities in elastic moduli, marked changes in the appearance and local properties of non-affine droplets and a sudden enhancement in defect pair concentration. Slow relaxation of stress and an-elasticity appear as observable dynamical consequences of this hidden criticality. Our results may be directly verified in colloidal crystals with video microscopy techniques but are expected to have more general validity.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Das T,Ganguly S,Sengupta S,Rao Mdoi
10.1038/srep10644subject
Has Abstractpub_date
2015-06-03 00:00:00pages
10644issn
2045-2322pii
srep10644journal_volume
5pub_type
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