Prog. Theor. Phys. Vol. 69 No. 4 (1983) pp. 1074-1084
A Simplified Theory of Melting for Lennard-Jones and Ionic Crystals Based on the Self-Consistent Einstein Model
Faculty of Science, Kwansai Gakuin University, Nishinomiya 662
*Faculty of Science and Technology, Kinki University, Osaka 577
(Received August 9, 1982)
A simplified theory of melting, which is based on the self-consistent Einstein model, is proposed to apply for the cases of Lennard-Jones and ionic crystals. The pressure-dependence and the quantum-effect for the melting of Lennard-Jones crystals are studied by this theory. It is shown that the Lindemann's hypothesis holds for the Lennard-Jones crystals. The theory is also applied to consider the sublattice melting for a simple model of the ionic crystal with zincblende structure where the cations move in a rigid anion-frame. The relevant Debye-Waller factor is obtained on this model and is compared with experiments.
DOI : 10.1143/PTP.69.1074
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Citing Article(s) :
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