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Surface photoemission in the 4d band from polycrystalline silver surfaces |
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| Authors: | E.E. Koch J. Barth J.-H. Fock A. Goldmann A. Otto |
| Affiliation: | Hamburger Synchrotronstrahlungslabor HASYLAB at DESY, D-2000 Hamburg 52, Federal Republic of Germany;II. Institut für Experimentalphysik, Universität Hamburg, D-2000 Hamburg 50, Federal Republic of Germany;Laboratorium für Festkörperphysik, Universität-GH Duisburg, D-4100 Duisburg, Federal Republic of Germany;Physikalisches Institut III, Universität Düsseldorf, D-4000 Düsseldorf 1, Federal Republic of Germany |
| Abstract: | Surface induced local d-band states in the upper 4d band between ～ 4 and ～ 5.2 eV below EFermi have been identified for polycrystalline silver films in photoemission experiments using synchroton radiation. A thin over-coat (10 å) by an Al film leads to a depression of these surface induced local states whereas a change from s- to p-polarized excitation leads to an enhancement. Deposition of additional silver (～ 3 Å) at 120 K induces additional emission 4.2 eV below EF with a FWHM of only ～ 0.4 eV. |
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