Journal Article

PreJuSER-58707

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Si nucleation on Si(111)-7x7: from cluster pairs to 2D islands

Filimonov, S. N.FZJ* ; Cherepanov, V.FZJ* ; Hervieu, Y. Y. ; Voigtländer, B.FZJ*

2007
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.susc.2007.04.031

Abstract: Nucleation of 2D islands in Si/Si(111)-7 x 7 molecular beam epitaxy is studied using scanning tunneling microscopy (STM). A detailed analysis of the population of small amorphous clusters coexisting on the surface with epitaxial 2D islands has been performed. It is shown that small clusters tend to form pairs. The pairs serve as precursors for 2D islands as confirmed by direct STM observations of the smallest 2D islands covering two adjacent half-unit cells of the 7 x 7 reconstruction. it is proved with scaling arguments that the critical nucleus for 2D island formation consists not only of the pair itself, but also includes additional adatoms not belonging to the stable clusters. (C) 2007 Elsevier B.V. All rights reserved.

Keyword(s): J ; molecular beam epitaxy (auto) ; scanning tunneling microscopy (auto) ; nucleation (auto) ; surface diffusion (auto) ; silicon (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Grenz- und Oberflächen (IBN-3)
2. Center of Nanoelectronic Systems for Information Technology (CNI)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2007

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