Two-dimensional ordering of chlorine on Ag(100)

David E. Taylor*, Ellen D. Williams, Robert L. Park, N. C. Bartelt, T. L. Einstein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


Chlorine adsorption on Ag(100) saturates at (1/2) monolayer (ML) in a c(2×2) structure. Desorption occurs above 650 K without disordering. The sticking coefficient remains constant to within 0.05 ML of saturation, consistent with the existence of a highly mobile precursor to adsorption. The c(2×2) structure forms at a critical coverage of 0.394±0.007 ML at room temperature. This is slightly higher than the critical coverage of the hard-square model (0.368 ML), suggesting the influence of further-neighbor interactions. The transition to an ordered structure as a function of coverage is second order and the measured critical exponent /(1-±) is 0.12±0.04, consistent with the Ising value of (1/8).

Original languageEnglish (US)
Pages (from-to)4653-4659
Number of pages7
JournalPhysical Review B
Issue number7
StatePublished - Jan 1 1985

ASJC Scopus subject areas

  • Condensed Matter Physics


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