SELF-SURFACTANT EFFECT ON FE AU(100) - PLACE EXCHANGE PLUS AU SELF-DIFFUSION/

Citation
Os. Hernan et al., SELF-SURFACTANT EFFECT ON FE AU(100) - PLACE EXCHANGE PLUS AU SELF-DIFFUSION/, Surface science, 415(1-2), 1998, pp. 106-121
Citations number
59
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
00396028
Volume
415
Issue
1-2
Year of publication
1998
Pages
106 - 121
Database
ISI
SICI code
0039-6028(1998)415:1-2<106:SEOFA->2.0.ZU;2-R
Abstract
In this paper, we report on the submonolayer growth of Fe on Au(100), a system where a monolayer of the substrate floats at the external sur face during growth facilitating the layer-by-layer growth of the Fe fi lm. STM and STS demonstrate that this self-surfactant action results f rom a combination of several processes: fast place exchange between Fe and the Au atoms of the topmost surface layer, anisotropic diffusion of the Au atoms ejected due to the local lifting of the surface recons truction, and preferential nucleation on the isolated Fe atoms embedde d within the surface. The Au atoms diffuse over the surface in a way a lmost identical to the homoepitaxial growth of Au on Au(100). As a res ult, stable, reconstructed islands composed of Au atoms are formed and end up burying the deposited Fe. (C) 1998 Elsevier Science B.V. All r ights reserved.