Dispersionless vibrational mode of a chemisorbed adsorbate observed with inelastic helium scattering: Hg on Cu(001)

C. Moses, Hong Zeng, J. S. Lin, Wei Li, M. Karimi, Gianfranco Vidali

Research output: Contribution to journalArticle

3 Scopus citations


Dispersionless single phonon creation and annihilation features have been observed across the entire Brillouin zone for the low density Hg monolayer adsorbed on Cu(001). This uncorrelated vibration of Hg atoms perpendicular to the surface contrasts sharply with the vibrational activity of most other chemisorbed metal atoms on metal substrates which exhibit correlated vibrations between groups of adsorbate atoms. The measured phonon energy has been used to build an interaction potential which incorporates both dynamical as well as static structural and thermodynamic properties of this system.

Original languageEnglish (US)
Pages (from-to)2377-2382
Number of pages6
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Issue number4
StatePublished - 1992


ASJC Scopus subject areas

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

Cite this