Self-Diffusion Constant in Rapidly Quenched States

Abstract

The self-diffusion constant D is calculated by the molecular dynamics method in rapidly quenched states of a model of liquid rubidium. The change of D during the rapid quenching process can be described by the Arrhenius formula above one third of the melting temperature, but shows an anomaly, some sort of glass-transition below that temperature. Thermal motions of atoms in the quenched states at lower temperatures seem to be the jumping through a very disordered solid.