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

Author

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

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.

Suggested Citation

  • Sadr-Lahijany, M.R. & Ray, P. & Stanley, H.E., 1999. "Melting driven by particle size-dispersity: a study in two dimensions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 270(1), pages 295-300.
    • Handle: RePEc:eee:phsmap:v:270:y:1999:i:1:p:295-300
    DOI: 10.1016/S0378-4371(99)00151-X
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