Melting in 2D lennard-jones systems: What type of phase transition?

Alexander Z. Patashinski, Rafal Orlik, Antoni C. Mitus, Bartosz A. Grzybowski, Mark A. Ratner

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A typical configuration of an equilibrium 2D system of 2500 Lennard-Jones particles at melting is found to be a mosaic of crystallites and amorphous clusters. This mosaic significantly changed at times around the period τ of local vibrations, while most particles retain their nearest neighbors for times much longer than τ. In a system of 2500 particles, we found no phase separation for length scales larger than that of a crystallite. With decreasing density, the number of small amorphous clusters increased, and proliferation and percolation of amorphous matter separated the crystalline-ordered parts so that correlations between local order orientations of remote crystallites disappeared. We suggest that the mosaic is a manifestation of diminished stability of the crystalline structure resulting from competition between attraction and repulsion forces.

Original languageEnglish
Pages (from-to)20749-20755
Number of pages7
JournalJournal of Physical Chemistry C
Volume114
Issue number48
DOIs
Publication statusPublished - Dec 9 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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