  Recent experiments provide evidence for density variations along shear bands
(SB) in metallic glasses with a length scale of a few hundreds nanometers. Via
molecular dynamics simulations of a generic binary glass model, here we show
that this is strongly correlated with variations of composition, coordination
number, viscosity and heat generation. Individual shear events along the
SB-path show a mean distance of a few nanometers, comparable to recent
experimental findings on medium range order. The aforementioned variations
result from these localized perturbations, mediated by elasticity.
