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Intrinsic surface state on Be(0 0 0 1) |
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| Authors: | U.O. Karlsson S.A. Flodström R. Engelhardt W. Gädeke E.E. Koch |
| Affiliation: | Department of Physics and Measurement Technology, Linköping Institute of Technology, S-581 83 Linköping, Sweden;Max-Synchrotron Radiation Laboratory, Physics Department, Lund University, S-223 62 Lund, Sweden;II. Institut für Experimentalphysik, Universität Hamburg, D-2000 Hamburg 50, West Germany;Hamburger Synchrotronstrahlungslabor HASYLAB at DESY, D-2000 Hamburg 52, West Germany |
| Abstract: | Using monochromatized synchrotron radiation in the range 24–30 eV, we have recorded angle-resolved photoemission spectra from a clean Be(0 0 0 1) crystal face. A surface state located in a band gap around Γ with an initial state energy of ?2.8 eV in normal emission was found. For k∥ along the line the surface state disperses upwards and passes EF at about 55% of the distance to the surface Brillouin zone boundary. |
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