Abstract
Phase changes of Lennard-Jones clusters containing 4N 3 (N= 1−20) identical atoms in terms of solid and liquid phase-like forms have been studied by performing molecular dynamics (MD) simulation at sharply-bounded range of temperatures between freezing temperature (T f) and melting temperature (T m) and at constant pressure. The small differences between the free energies of clusters in different phase-like forms and also the non-rigidity of the cluster (0 ≤ γ ≤ 1) as an order-parameter, which characterizes the phase transition, have been calculated. Plots of the free energy of phase change versus the non-rigidity indicate that the free energy is a continuous function of the non-rigidity and also different crystalline-like cores with different free energies correspond to the same non-rigidity factor at any given temperature.
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Nasehzadeh, A., Etminan, N. Phase change of Lennard-Jones nano clusters containing non magic numbers. JICS 7 (Suppl 2), S28–S33 (2010). https://doi.org/10.1007/BF03246182
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DOI: https://doi.org/10.1007/BF03246182