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; G. Vidali

doi:10.1116/1.577969

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, G. Vidali

Department of Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	2377-2382
Number of pages	6
Journal	Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume	10
Issue number	4
DOIs	https://doi.org/10.1116/1.577969
State	Published - Jul 1992

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

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AU - Zeng, Hong

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AU - Li, Wei

AU - Karimi, M.

AU - Vidali, G.

PY - 1992/7

Y1 - 1992/7

N2 - 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.

AB - 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.

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

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