Surface resonant phonons of Ag(110)

  • Tatarek R
  • Bracco G
  • Tommasini F
 et al. 
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Abstract

A study of the dynamics of the Ag(110) surface in the ḡGȲ direction is presented. The experimental TOF spectra show the existence of two low frequency modes with high scattering intensity and a dispersionless high frequency mode with a smaller intensity. The theoretical analysis based on a force constant model that contains long-range central interactions and short-range angular forces explains accurately both the dispersions and the scattering intensities of the three modes in terms of resonant and localized vibrations related to the modifications of the surface force constants caused by the different role played by the many-body forces in the surface region. © 1989.

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Authors

  • R. Tatarek

  • G. Bracco

  • F. Tommasini

  • A. Franchini

  • V. Bortolani

  • G. Santoro

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