Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

The adsorption geometry of the (2 x 1)-20 oxygen phase formed on the Co(10̅10) surface


Gierer,  M.
Fritz Haber Institute, Max Planck Society;


Over,  Herbert
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Gierer, M., Over, H., Rech, P., Schwarz, E., & Christmann, K. (1997). The adsorption geometry of the (2 x 1)-20 oxygen phase formed on the Co(10̅10) surface. Surface Science, 370(2-3), L201-L206. doi:10.1016/S0039-6028(96)01202-2.

Cite as: https://hdl.handle.net/21.11116/0000-0008-A1A2-A
The bond geometry of the (2 x 1)-20-p2mg overlayer on Co(10̅10) was determined by analyzing low-energy electron diffraction (LEED) intensity data. Oxygen occupies the three-fold 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±0.10Å and 1.99±0.10Å 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 Å) with respect to the bulk value of 0.72 Å. This strong expansion might offer diffusion channels for O atoms to penetrate further into the subsurface region.