Melting transition of submonolayer Ar adsorbed on graphite

A. D. Migone, Z. R. Li, Moses Hung-Wai Chan

Research output: Contribution to journalArticlepeer-review

91 Scopus citations


Precision ac heat-capacity scans of submonolayer Ar on Graphite Foam exhibit a liquidvapor anomaly near 55 K, a small, sharp, coverage-independent peak at 47.2 ± 0.2 K, and a broad anomaly near 49.5 K. The 47.2-K peak suggests that the Ar overlayer melts via a "weak" first-order (rather than continuous) transition. The 49.5-K anomaly appears to be related to the gradual decrease of correlation (possibly substrate-induced orientational order) that exists in the liquid phase.

Original languageEnglish (US)
Pages (from-to)810-813
Number of pages4
JournalPhysical Review Letters
Issue number8
StatePublished - Jan 1 1984

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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