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We investigate a binary Lennard-Jones mixture with molecular dynamicssimulations. We consider first a system cooled linearly in time with thecooling rate gamma. By varying gamma over almost four decades we study theinfluence of the cooling rate on the glass transition and on the resultingglass. We find for all investigated quantities a cooling rate dependence; withdecreasing cooling rate the system falls out of equilibrium at decreasingtemperatures, reaches lower enthalpies and obtains increasing local order. Nextwe study the dynamics of the melting process by investigating the most immobileand most mobile particles in the glass. We find that their spatial distributionis heterogeneous and that the immobile/mobile particles are surrounded bydenser/less dense cages than an average particle.Comment: 9 pages, latex, 10 figure

COOLING RATE DEPENDENCE AND DYNAMIC HETEROGENEITY BELOW THE GLASS TRANSITION IN A LENNARD–JONES GLASS