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  Local structure determination for low-coverage CO on Ni(111)

Davis, R., Woodruff, D., Hofmann, P., Schaff, O., Fernandez, V., Schindler, K.-M., et al. (1996). Local structure determination for low-coverage CO on Ni(111). Journal of Physics: Condensed Matter, 8(10), 1367-1379. doi:10.1088/0953-8984/8/10/009.

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 Creators:
Davis, R.1, Author
Woodruff, D.P.1, Author
Hofmann, Philip2, Author           
Schaff, Oliver2, Author           
Fernandez, V.2, Author           
Schindler, Karl-Michael3, Author           
Fritzsche, V.2, Author           
Bradshaw, Alexander M.2, Author           
Affiliations:
1Physics Department, University of Warwick, Coventry CV4 7AL, UK, ou_persistent22              
2Fritz Haber Institute, Max Planck Society, ou_24021              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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 Abstract: Scanned-energy-mode photoelectron diffraction has been used to determine the local adsorption structure of CO on Ni(111) at low temperature at a coverage of approximately 0.25 ML, corresponding to a nominal ( 2 x 2) phase. CO molecules are found to occupy the same two (`hcp' and `fcc') inequivalent hollow sites as in the 0.5 ML c(4 x 2) - CO phase, and while the results do indicate a preference for the hcp hollow site directly above a second-layer Ni atom in the low-coverage state, this preference (65 + 20%) is of marginal statistical significance. The similarity of this parameter in both the (2 x 2) and c(4 x 2) phases can only be reconciled by assuming significant local disorder. It does, however, indicate that the local binding energies at the two hollow sites are very similar and that the presence of both sites in the c(4 x 2) phase is not simply a consequence of near-neighbour adsorbate - adsorbate repulsion.

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Language(s): eng - English
 Dates: 1995-11-301996
 Publication Status: Issued
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1088/0953-8984/8/10/009
 Degree: -

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Title: Journal of Physics: Condensed Matter
  Abbreviation : J. Phys. Condens. Matter.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: 13 Volume / Issue: 8 (10) Sequence Number: - Start / End Page: 1367 - 1379 Identifier: ISSN: 0953-8984
CoNE: https://pure.mpg.de/cone/journals/resource/954928562478