Layer-dependent shifts in ionization potential and auger energies for Kr/Cu (110) |
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Authors: | T Mandel G Kaindl K Horn M Iwan HU Middelmann C Mariani |
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Institution: | Institut für Atom- und Festkörperphysik, Freie Universität Berlin, D-1000 Berlin 33, West Germany;Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-1000 Berlin 33, West Germany |
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Abstract: | Photoelectron spectra of the krypton 3d core-levels and MNN Auger spectra of krypton mono- and multilayers on Cu(110) have been recorded with synchrotron radiation. The Kr-3d line is found to shift to higher binding energies by 0.73 eV for first- and second-layer adsorption, respectively. This value is much larger than the work function decrease for Kr mono-layer adsorption, Δø = ?0.29eV. The shift in Auger line energies is found to be about three times larger than the 3d line shift. These observations can be readily explained in terms of image-charge screening of the hole states. |
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