Surface potential around potassium promoter atoms on Rh(111) measured with photoemission of adsorbed Xe, Kr, and Ar
- 15 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 49 (20), 14599-14609
- https://doi.org/10.1103/physrevb.49.14599
Abstract
The effect of potassium promoter atoms on Rh(111) on the surface potential has been investigated with photoemission of adsorbed Xe, Kr, and Ar. By using probe atoms of different sizes, we have measured the variation of the surface potential in the vicinity of a potassium atom. The surface potentials have been probed on Rh(111) surfaces, covered with 2.7, 4.1, and 5.0 at. % potassium. At all these coverages, we find a decrease in potential close to the potassium atoms (Keywords
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