  Dynamics of jammed packings of soft athermal disks under finite-rate shear
are studied by means of molecular dynamics simulations. Particularly, we
investigate the spatial structures of stress drop events, which are expected to
provide information about plasticity. Investigating the displacement fields
during stress drop events, we show that there are qualitatively different two
types of events in the low rate limit: localized ones and extended ones. We
further investigate the time evolution of events and clarify that both types of
events are due to oscillatory motion of the stress, which is unique for systems
under finite-rate shear. The difference between two types of events is the
regime that events reside in: while localized events take place during plastic
events, extended ones occur in the elastic branch.
