Melting driven by particle size-dispersity: a study in two dimensions

M.R. Sadr-Lahijany, P. Ray and H.E. Stanley

Physica A: Statistical Mechanics and its Applications, 1999, vol. 270, issue 1, 295-300

Abstract: We study the effect of particle size-dispersity on solids and melting of solids by molecular dynamics simulation on a two-dimensional size-dispersed Lennard-Jones system. We find that size-dispersity disfavours solidification and on increasing the dispersity, the solid ‘melts’, at a critical dispersity, to a liquid. The solid–liquid transition depends on the density — the transition is continuous through the ‘hexatic’ phase at low densities and abrupt first order transition at higher densities. We find that size-dispersity creates topological defects in the close-pack solid structure which destroy the crystalline order in solids.

Keywords: Size-dispersity; Melting transition; Hexatic phase; Topological defects (search for similar items in EconPapers)
Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:270:y:1999:i:1:p:295-300

DOI: 10.1016/S0378-4371(99)00151-X

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