Journal article

The adsorption geometry of the (2 × 1)-2O oxygen phase formed on the Co(101̄0) surface


Authors listGierer, M; Over, H; Rech, P; Schwarz, E; Christmann, K

Publication year1997

PagesL201-L206

JournalSurface Science

Volume number370

Issue number2-3

DOI Linkhttps://doi.org/10.1016/S0039-6028(96)01202-2

PublisherElsevier


Abstract

The bond geometry of the (2x1)-20-p2mg overlayer on Co(<10(1)over bar 0>) was determined by analyzing low-energy electron diffraction (LEED) intensity data. Oxygen occupies the threefold coordinated hcp site along the densely packed rows on the unreconstructed surface. The O atoms are attached to two atoms in the first Co layer and to one Co atom in the second layer. The strong interaction between O and Co is indicated by the bond lengths of 1.83+/-0.10 Angstrom and 1.99+/-0.10 Angstrom to the top-layer Co and the Co atoms in the second layer, respectively. The most striking result of our work is that oxygen adsorption causes a marked expansion (by 25%) of the first Co layer spacing (0.90 Angstrom) with respect to the bulk value of 0.72 Angstrom. This strong expansion might offer diffusion channels for O atoms to penetrate further into the subsurface region.




Authors/Editors




Citation Styles

Harvard Citation styleGierer, M., Over, H., Rech, P., Schwarz, E. and Christmann, K. (1997) The adsorption geometry of the (2 × 1)-2O oxygen phase formed on the Co(101̄0) surface, Surface Science, 370(2-3), pp. L201-L206. https://doi.org/10.1016/S0039-6028(96)01202-2

APA Citation styleGierer, M., Over, H., Rech, P., Schwarz, E., & Christmann, K. (1997). The adsorption geometry of the (2 × 1)-2O oxygen phase formed on the Co(101̄0) surface. Surface Science. 370(2-3), L201-L206. https://doi.org/10.1016/S0039-6028(96)01202-2


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