Anomalous linewidth behaviour of the S3 surface resonance on Ag(110)
Dipartimento di Fisica - Via Dodecaneso 33, 16146 Genova, Italy
2 Unità INFN e Dipartimento di Fisica - Via Campi 213/A, 41100 Modena, Italy
Accepted: 7 May 1996
We report detailed He atom scattering measurements of the phonon line width for the Ray leigh mode S1 and the resonant mode S3 of Ag(110) along the whole side of the surface Brillouin zone as a function of the sample temperature. The novel behaviour observed for the resonance linewidth is explained by including the mixed-mode nature into the anharmonic calculations performed within the framework of the Born-von Karman model.
PACS: 68.35.Ja – Surface and interface dynamics and vibrations / 63.20.Ry – Anharmonic lattice modes / 79.20.Rf – Atomic, molecular, and ion beam interactions with surfaces
© EDP Sciences, 1996