(2×1)OXYGEN SUPERSTRUCTURE ON Cu(210) SURFACE STUDIED BY QUANTITATIVE LEED ANALYSIS AND STM

K. C. Tan, Y. P. Guo, A. T. S. Wee and C. H. A. Huan
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K. C. Tan: Department of Physics, National University of Singapore, Kent Ridge, 119260, Singapore
Y. P. Guo: Department of Physics, National University of Singapore, Kent Ridge, 119260, Singapore
A. T. S. Wee: Department of Physics, National University of Singapore, Kent Ridge, 119260, Singapore
C. H. A. Huan: Department of Physics, National University of Singapore, Kent Ridge, 119260, Singapore

Surface Review and Letters (SRL), 1999, vol. 06, issue 05, 859-863

Abstract: Adsorption of oxygen at elevated temperatures on Cu(210) surface leads to the formation of a(2×1)superstructure similar to that found on Cu(110). Previous STM work done on this system showed diperiodic Cu–O rows running along the [001] direction. In this work, low energy electron diffraction (LEED) experiments were done on the Cu(210)-(2×1)O surface structure. Ten diffracted beams at normal incidence were used for multiple scattering calculations using the Barberi/Van Hove symmetrized tensor LEED code. Four models were optimized for the calculations and the best fit to experiment is found to be the model with alternate missing –Cu–0– rows and oxygen atom occupying the long bridge site. Oxygen to first and second Cu nearest neighbors are optimized to 1.81 and 1.92 Å respectively and the position of the oxygen atom above the (110) plane have been optimized to about 0.12 Å.

Date: 1999
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DOI: 10.1142/S0218625X99000913

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