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Photoelectron diffraction investigation of the structure of the clean TiO2(110)(1×1) surface

By E. A. Kröger, D. I. Sayago, F. Allegretti, M. J. Knight, M. Polcik, W. (Werner) Unterberger, T. J. Lerotholi, K. A. Hogan, C. L. A. Lamont and D. P. Woodruff


The surface relaxations of the rutile TiO2(110)(1×1) clean surface have been determined by O 1 s and Ti 2p3∕2 scanned-energy mode photoelectron diffraction. The results are in excellent agreement with recent low-energy electron diffraction (LEED) and medium energy ion scattering (MEIS) results, but in conflict with the results of some earlier investigations including one by surface x-ray diffraction. In particular, the bridging O atoms at the surface are found to relax outward, rather than inward, relative to the underlying bulk. Combined with the recent LEED and MEIS results, a consistent picture of the structure of this surface is provided. While the results of the most recent theoretical total-energy calculations are qualitatively consistent with this experimental consensus, significant quantitative differences remain

Topics: QC
Publisher: American Physical Society
Year: 2007
OAI identifier:

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