Jawaharlal Nehru Centre for Advanced Scientific Research, India
Yielding, jamming, and nonequilibrium transitions in cyclically driven matter
Cyclically driven colloidal suspensions, atomic glasses, and sphere packings have recently been studied in simulations and experiments to understand the nature and significance of a non-equilibrium transition from localised to diffusive states they are found to exhibit, and increasingly, for the insights such transitions provide into transitions from arrested (or localised) to ergodic (or diffusive) states of matter, such as the yielding behaviour of glasses and jamming in sphere packings. The nature of this transition is different in interesting ways at high packing fractions where it is related to yielding behaviour in glasses and at low enough packing fractions, seen e. g. in colloidal suspensions. Results from athermal cylic deformation of model glasses and sphere packings are presented, which shed light on yielding and shear banding behaviour in glasses, and the jamming transition.