Ordering of metal overlayers on metal substrates studied using atom beam scattering

G. Vidali, C. W. Hutchings, P. A. Dowben

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We will illustrate how atom beam scattering (ABS) can be used to study the growth and ordering of adsorption of Hg on Cu (001). At low coverage (less than 2% of a rnonolayer), we obtain that the scattering cross section of He with (adsorbed) Hg is about 50 A2. We find that mercury forms two stable phases on Cu(001) in the temperature range between 200 and 330K, ac(2x2) and a high density c(4x4) phase. From ABS diffraction data, we can deduce the corrugation of the surface electron charge density of the mercury layer in the two ordered phases. From the analysis of our data, we obtain a Debye temperature for the Hg overlayer of about 115 K. We will report preliminary calculations on the adsorption energy of Hg on Cu(001) and on the interaction of He with a Hg preplated Cu(001) surface.

Original languageEnglish (US)
Pages (from-to)3043-3047
Number of pages5
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume8
Issue number3
DOIs
StatePublished - May 1990

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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