Valence Level of Adsorbed K Atoms Probed by Metastable-He Deexcitation Spectroscopy
- 9 September 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 55 (11) , 1231-1234
- https://doi.org/10.1103/physrevlett.55.1231
Abstract
Deexcitation of metastable He atoms has been used to probe the existence of a partially occupied -derived level close to the Fermi level of K atoms adsorbed on a Cu(110) surface, even at very low coverages. The width of this level decreases from about 3 eV at low coverage to 2 eV at high coverage, reflecting the transition from the chemisorbed to the metallic state of the adsorbate.
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