We investigate the yielding and transition to flow of different colloidal glasses. Using a single
model system, a binary mixture of colloidal hard spheres with different compositions and
size ratios, we study single, double and asymmetric glasses, which differ in the degree of
mobility of the small particles and the caging mechanisms of the large spheres. The
rheological response following either a step to a constant shear rate or to a constant stress
(creep) is measured and the two responses are quantitatively compared. Although the same …