Optical surface absorption by surface-adsorbate charge-transfer excitations |
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Authors: | S Schatteburg D Diesing A Otto |
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Institution: | Lehrstuhl für Oberfl?chenwissenschaft, Heinrich-Heine-Universit?t, 40225 Düsseldorf, Germany, DE
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Abstract: | Metal-insulator-silver junctions are well suited to measure genuine surface optical excitations, especially electronic transitions
to the lowest unoccupied molecular orbitals (LUMO) of adsorbates on silver. This is demonstrated by the increase of internal
photoemission current after monolayer coverage with C2H4 (which has π*-LUMO) by a factor of about 2.5, but a missing change in the case of C2H6 (which has no π*-LUMO ).
Received: 26 November 1999 / Published online: 8 March 2000 |
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Keywords: | PACS: 73 20 -r 73 40 Rw |
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