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

    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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