Title

Germanium adsorption on Ag(111): An AES-LEED and STM study

Authors

Authors

H. Oughaddou; A. Mayne; B. Aufray; J. P. Biberian; G. Le Lay; B. Ealet; G. Dujardin;A. Kara

Comments

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Abbreviated Journal Title

J. Nanosci. Nanotechnol.

Keywords

STM; AES; LEED; ge nanostructures; self-organization; silver; auger; SCANNING-TUNNELING-MICROSCOPY; X-RAY-DIFFRACTION; INTERFACE FORMATION; SURFACE; GROWTH; SILICON; PHOTOEMISSION; AG(001); FILMS; GE; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

Abstract

The adsorption of germanium on Ag(111) has been investigated using Scanning Tunneling Microscopy, Auger Electron Spectroscopy and Low Energy Electron Diffraction. From the shape of the Auger peak-to-peak versus time curves, we deduce that at room temperature the growth mode is nearly layer-by-layer at least for the first two layers. In the sub-monolayer range, the growth starts by the formation of a (root 3 x root 3)R30 degrees surface superstructure which is complete at 1/3 monolayer coverage. Beyond this coverage a rectangular c(root 3 x 7) superstructure is observed. STM images reveal that this last reconstruction is formed by an ordered arrangement of self-assembled Ge tetramers giving rise to a surprising undulation of the surface.

Journal Title

Journal of Nanoscience and Nanotechnology

Volume

7

Issue/Number

9

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

3189

Last Page

3192

WOS Identifier

WOS:000250388400023

ISSN

1533-4880

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