The vibrational dynamics of the ordered metallic Pd/Cu(100) surface alloys

R. Chadli, A. Khater, R. Tigrine

Research output: Contribution to journalArticle

Abstract

The vibrational properties of the three ordered metallic surface alloys, Cu(100)-c(2 × 2)-Pd, Cu(100)-(2 × 1)-Pd, and Cu(100)-(2 × 2)-Pd, are presented. The phonon dispersions of vibrational modes as well as the local density of phonon states (LDOS) are calculated using matching theory associated with Green's function formalism. The calculated results are discussed and interpreted. In particular, the transfer of charge between the Pd and Cu atoms in the surface alloys modifies the surface boundary force constants, with resultant remarkable differences for the vibrational LDOS on the Pd and Cu atomic sites at the Pd/Cu(100) surface, compared to the LDOS at the pure Cu(100) surface. This may favor new Pd-catalyzed reactions at such surface alloys systems.

Original languageEnglish
Article number12500072
JournalSurface Review and Letters
Volume19
Issue number1
DOIs
Publication statusPublished - Feb 2012
Externally publishedYes

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Dispersions
Green's function
vibration mode
Green's functions
formalism
Atoms
atoms

Keywords

  • LDOS
  • Surface alloys
  • surface phonons

ASJC Scopus subject areas

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

Cite this

The vibrational dynamics of the ordered metallic Pd/Cu(100) surface alloys. / Chadli, R.; Khater, A.; Tigrine, R.

In: Surface Review and Letters, Vol. 19, No. 1, 12500072, 02.2012.

Research output: Contribution to journalArticle

Chadli, R. ; Khater, A. ; Tigrine, R. / The vibrational dynamics of the ordered metallic Pd/Cu(100) surface alloys. In: Surface Review and Letters. 2012 ; Vol. 19, No. 1.
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