Photoemission from physisorbed Co on clean and Xe-covered Al(111) |
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Authors: | T-C Chiang G Kaindl DE Eastman |
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Institution: | IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, U.S.A. |
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Abstract: | Molecular-orbital energy shifts are observed in photoemission from weakly physisorbed CO on clean and Xe-covered Al(111) surfaces. These shifts in ionization potentials are mainly due to final-state relaxation effects, which can be described approximately by a point-charge image-potential model. Differential distance- and orbital-dependent energy shifts suggest that CO molecules lie flat on the substrates. CO is adsorbed on Al(111) with a heat of formation of 0.21 eV/molecule. |
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