Oxygen adsorption induced energy shift of a surface state on cesium covered Cu(111) |
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Authors: | S.Å. Lindgren L. Walld́en |
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Affiliation: | Physics Department, Chaìmers University of Technology, S-412 96 Göteberg, Sweden |
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Abstract: | Photoelectron energy spectra from an oxygen exposed, partially Cs covered Cu(111) crystal show that a fractionally occupied electronic surface band shifts to higher energy upon oxygen adsorption. We associate the upward energy shift with the donation of surface state electrons to weakly chemisorbed cesium oxide molecules formed on the surface. |
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