Lead adsorption on the Al13Co4(100) surface: heterogeneous nucleation and pseudomorphic growth

Abstract : We have investigated the adsorption of Pb atoms on the (100) surface of an orthorhombic Al13Co4 crystal at 300 and 573 K substrate temperatures. This complex metallic alloy is an approximant to the decagonal Al-Ni-Co quasicrystal. At submonolayer coverage and at 300 K, Pb adatoms remain highly mobile and adsorb preferentially within the hollow site situated in between adjacent Al pentagonal clusters present at the surface. These experimental findings are supported by ab initio calculations based on density functional theory (DFT). For both temperature regimes, Pb adsorption leads to the formation of pseudomorphic monolayers above which the high adsorbate mobility prohibits the growth of additional layers. For the high-temperature deposition, we propose a structural model for the Pb film and discuss its relationship with the underneath substrate.
Type de document :
Article dans une revue
New Journal of Physics, Institute of Physics: Open Access Journals, 2011, 13, pp.103011. <10.1088/1367-2630/13/10/103011>
Liste complète des métadonnées


https://hal.archives-ouvertes.fr/hal-00974233
Contributeur : Emilie Gaudry <>
Soumis le : samedi 5 avril 2014 - 17:33:38
Dernière modification le : mercredi 18 mai 2016 - 01:03:52
Document(s) archivé(s) le : samedi 5 juillet 2014 - 10:46:26

Fichier

1367-2630_13_10_103011.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

R. Addou, A. Shukla, S. Alarcon Villaseca, Emilie Gaudry, Th Deniozou, et al.. Lead adsorption on the Al13Co4(100) surface: heterogeneous nucleation and pseudomorphic growth. New Journal of Physics, Institute of Physics: Open Access Journals, 2011, 13, pp.103011. <10.1088/1367-2630/13/10/103011>. <hal-00974233>

Partager

Métriques

Consultations de
la notice

119

Téléchargements du document

102