By a consistent application of the distorted-wave Born approximation, the Debye-Waller exponent for the scattering of He atoms from the Ag(111) surface is directly computed. When diffraction is negligible, as in this case, the decrease in specular intensity is simply obtained by summing the scattering due to all possible one-phonon processes. Using one-phonon computed intensities that agree with experiment along high-symmetry directions of the surface Brillouin zone, we find that the computed Debye-Waller exponent agrees with experiment and corresponds to an effective Debye temperature of 241 K. All corrections to the eikonal-type formula, 2W=4pz2〈uz2〉, are automatically included. In particular, the contribution of phonons with high parallel momentum is sharply cut off.

Calculation of Debye-Waller factor for atom-surface scattering:He on Ag(111) / IDIODI, J.; BORTOLANI, Virginio; FRANCHINI, Anna; SANTORO, Giorgio; CELLI, V.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 35:(1987), pp. 6029-6033. [10.1103/PhysRevB.35.6029]

Calculation of Debye-Waller factor for atom-surface scattering:He on Ag(111)

BORTOLANI, Virginio;FRANCHINI, Anna;SANTORO, Giorgio;
1987

Abstract

By a consistent application of the distorted-wave Born approximation, the Debye-Waller exponent for the scattering of He atoms from the Ag(111) surface is directly computed. When diffraction is negligible, as in this case, the decrease in specular intensity is simply obtained by summing the scattering due to all possible one-phonon processes. Using one-phonon computed intensities that agree with experiment along high-symmetry directions of the surface Brillouin zone, we find that the computed Debye-Waller exponent agrees with experiment and corresponds to an effective Debye temperature of 241 K. All corrections to the eikonal-type formula, 2W=4pz2〈uz2〉, are automatically included. In particular, the contribution of phonons with high parallel momentum is sharply cut off.
35
6029
6033
Calculation of Debye-Waller factor for atom-surface scattering:He on Ag(111) / IDIODI, J.; BORTOLANI, Virginio; FRANCHINI, Anna; SANTORO, Giorgio; CELLI, V.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 35:(1987), pp. 6029-6033. [10.1103/PhysRevB.35.6029]
Idiodi, J.; Bortolani, Virginio; Franchini, Anna; Santoro, Giorgio; Celli, V.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/452121
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 16
social impact