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- Title
DYNAMICAL ANALYSIS OF X-RAY PHOTOELECTRON DIFFRACTION FROM (001)(2×2)- AND - SURFACES.
- Authors
CHEN, X.; ABUKAWA, T.; TANI, J.; KONO, S.
- Abstract
The local structures of (001)(2×2)- and - [refer to as (2×2)- and -] surfaces have been studied by x-ray photoelectron diffraction (XPD) for and emissions with both multiple-scattering and single-scattering cluster approaches. Our dynamical study has revealed that the outermost layers of these surfaces form rumpled alloy structures, and the height of adsorbate atoms is 0.3±0.1 Å above that of W atoms in the top layer, and both adsorbate and tungsten atoms are at fourfold symmetric sites on the surfaces. It is also found in this study that there is a strong multiple-scattering effect on these surfaces, and a kinematical analysis fails completely on XPD from the (2×2)- surface at a high kinetic energy of 1115 eV, where the validity of the single-scattering theory was taken for granted in the past. Conditions that may result in such a strong multiple scattering in the systems are discussed in this paper.
- Publication
Surface Review & Letters, 1995, Vol 2, Issue 6, p795
- ISSN
0218-625X
- Publication type
Article
- DOI
10.1142/S0218625X95000728