New evidence for the influence of step morphology on the formation of Au atomic chains on vicinal Si(111) surfaces
Citation:
N. McAlinden and J. F. McGilp, New evidence for the influence of step morphology on the formation of Au atomic chains on vicinal Si(111) surfaces, EPL, 92, 2010, 67008/1 - 5Download Item:
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Abstract:
Gold atomic chain structures that grow on singular and vicinal Si(111) surfaces have attracted considerable interest as model systems for exploring quasi-one-dimensional metallic behaviour. The structure of the prototypical Si(111)-5 x 2-Au system remains controversial, however. Reflection anisotropy spectroscopy provides new, independent evidence supporting a recently proposed three-Au-chain structure. For stepped surfaces, the results provide good evidence that a single Au chain forms adjacent to [(1) over bar(1) over bar2] steps and a double Au chain forms adjacent to [11 (2) over bar] steps. In both cases spectral lineshape and coverage data support a three-chain Si(111)-5 x 2-Au structure forming over the remainder of the terrace. For all the vicinal Si(111) surfaces, including Si(557) and Si(775), it is the step morphology, and not the terrace width, that determines whether single- or double-Au-chain structures are formed in the region of the steps.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
06/RFP/PHY042
Irish Research Council for Science and Engineering Technology (IRCSET)
Author's Homepage:
http://people.tcd.ie/jmcgilpDescription:
PUBLISHED
Author: MCGILP, JOHN
Sponsor:
Science Foundation Ireland (SFI)Irish Research Council for Science and Engineering Technology (IRCSET)
Type of material:
Journal ArticleCollections:
Series/Report no:
EPL92
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Full text availableSubject:
Particles and fields physics, SI SURFACES, GOLDSubject (TCD):
Nanoscience & MaterialsThe following license files are associated with this item: