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Title: Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111)
Sponsor: Science Foundation Ireland
Irish Research Council for Science Engineering and Technology
Author's Homepage:
Keywords: Condensed matter physics
thin films
Issue Date: 2009
Publisher: Institute of Physics
Citation: N McAlinden, J F McGilp, Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111), Journal of Physics: Condensed Matter, 21, 2009, 474208/1 - 5
Series/Report no.: Journal of Physics: Condensed Matter;
Abstract: The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers (ML) of amorphous Si (a-Si) at room temperature perturbs the anisotropic optical response of the double chain structure. By one third of a monolayer, no significant optical anisotropy associated with the chains remains. No anisotropic response re-emerges at higher coverages, up to 4.6 nm (14.5 ML) where there is recent evidence that the crystal structure of the double chain phase is maintained under the cap. The RAS results show that the anisotropic properties of the phase are quenched by a-Si adsorption, even though the crystal structure of the capped phase appears to be preserved.
Description: PUBLISHED
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Appears in Collections:Physics (Scholarly Publications)

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