In this paper we present a numerical calculation of the Rayleigh wave phonon linewidth based on a cubic anharmonic expansion of the interatomic potential of the crystal. The linewidth is evaluated at high symmetry points of the twodimensional Brillouin Zone (SBZ) of the Al low Miller indices surfaces for various temperatures. The results are consistent with the experimental He surface scattering measurements and show an enhanced linewidth with respect to the nulk transverse one.
Surface phonon linewidth of Al / Franchini, Anna; Bortolani, Virginio; Santoro, Giorgio; Wallis, R. F.; Maradudin, A. A.. - In: VUOTO. - ISSN 0391-3155. - STAMPA. - XXIII:(1994), pp. 94-96.
Surface phonon linewidth of Al
FRANCHINI, Anna;BORTOLANI, Virginio;SANTORO, Giorgio;
1994
Abstract
In this paper we present a numerical calculation of the Rayleigh wave phonon linewidth based on a cubic anharmonic expansion of the interatomic potential of the crystal. The linewidth is evaluated at high symmetry points of the twodimensional Brillouin Zone (SBZ) of the Al low Miller indices surfaces for various temperatures. The results are consistent with the experimental He surface scattering measurements and show an enhanced linewidth with respect to the nulk transverse one.
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