Steepest-Descent Quenches and the Melting of Microclusters
Extensive molecular dynamics simulations have been performed on clusters of argon atoms to investigate the microscopic mechanism for the melting transition. The steepest-descent quench technique has been employed along the trajectories at energies in the transition region and in the liquid portion of the caloric curves. The potential minima most frequently accessed at the various energies are thus obtained. The coexistence and magic number phenomena are explained in terms of the geometrical structures accessed and the mechanisms for the motions between structures. Pentagonal structures dominate in the melting of these small clusters.
KeywordsMonte Carlo Bimodal Distribution Magic Number Melting Transition Coexistence Region
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