Mode coupling behavior of a Lennard-Jones binary mixture:A comparison between bulk and confined phases

摘要

We present a quantitative comparison at equivalent thermodynamical conditions of bulk and confined dynamical properties of a Lennard-Jones binary mixture upon supercooling.Both systems had been previously found to display a behavior in agreement with the mode coupling theory of the evolution of glassy dynamics.Differences and analogies of behavior are discussed focusing,in particular,on the role of hopping in reducing spatially correlated dynamics in the confined system with respect to the bulk.