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Phase diagram of argon clusters

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Details

Original languageEnglish
Pages (from-to)5826-5833
Number of pages8
JournalJournal of Chemical Physics
Volume108
Issue number14
DOIs
Publication statusPublished - 1998
Externally publishedYes
Publication typeA1 Journal article-refereed

Abstract

Systems containing both argon cluster with number of atoms N=100, 200, or 400 and argon vapor were studied with constant energy molecular dynamics simulations. The vapor pressure versus temperature phase diagram including the melting temperatures was determined as a function of cluster particle number. The melting temperature of the cluster was determined with a new method based on the nearest-neighbor exchange of atoms, and it was found to approach the bulk melting temperature linearly as a function of N-1/3. The vapor pressure versus temperature curve approached the corresponding bulk curve as the particle number of the cluster increased. At temperatures lower than the melting temperatures the clusters were found to contain an icosahedral core.