Memory effects in schematic models of glasses subjected to oscillatory deformation

作者：Fiocco Davide^*; Foffi Giuseppe; Sastry Srikanth

来源：Journal of Physics: Condensed Matter , 2015, 27(19): 194130.

DOI：10.1088/0953-8984/27/19/194130

• memory
• glasses
• toy models
• mechanical deformations

We consider two schematic models of glasses subjected to oscillatory shear deformation, motivated by the observations, in computer simulations of a model glass, of a nonequilibrium transition from a localized to a diffusive regime as the shear amplitude is increased, and of persistent memory effects in the localized regime. The first of these schematic models is the NK model, a spin model with disordered multi-spin interactions previously studied as a model for sheared amorphous solids. The second model, a transition matrix model, is an abstract formulation of the manner in which occupancy of local energy minima evolves under oscillatory deformation cycles. In both of these models, we find a behavior similar to that of an atomic model glass studied earlier. We discuss possible further extensions of the approaches outlined.

• 出版日期2015-5-20