Author
Listed:
- S. LÖBUS
(Laboratorium für Festkörperphysik, Universität Duisburg, D-47048 Duisburg, Germany)
- R. COURTHS
(Laboratorium für Festkörperphysik, Universität Duisburg, D-47048 Duisburg, Germany)
- S. HALILOV
(Theoretische Festkörperphysik, Universität Duisburg, D-47048 Duisburg, Germany)
- H. GOLLISCH
(Theoretische Festkörperphysik, Universität Duisburg, D-47048 Duisburg, Germany)
- R. FEDER
(Theoretische Festkörperphysik, Universität Duisburg, D-47048 Duisburg, Germany)
Abstract
We have performed an angle-resolved ultraviolet photoemission spectroscopy (ARUPS) investigation of orderedCu3Au(001)at room temperature using He resonance and synchrotron radiation. The positions of upperCu-like bulk bands near the center Γ of the bulk Brillouin zone (BZ) and the dispersion of the upper sp band along the A line have been determined using bulk-sensitive photon energies10 eV≤hν≥15 eV. Except for a downward shift, the calculated bulk bands are in excellent agreement with experiment. Around the centers$\overline \Gamma$of the surface BZ, we have identified three new surface states in the energy region of the Au-like states and several surface-sensitive features in theCu-like region below the known surface state on top of the Cu-like bulk d bands. These states strongly contribute to the ARUPS spectra forhν≥20 eV. The wealth of surface features found is in overall agreement with a recent surface electronic structure calculation [S. Halilov, H. Gollisch, E. Tamura and R. Feder,J. Phys.: Condens. Matter5, 4711 (1993)]. More detailed information is obtained by comparing the experimental spectra with theoretical ones calculated by a relativistic one-step model formalism.
Suggested Citation
S. Löbus & R. Courths & S. Halilov & H. Gollisch & R. Feder, 1996.
"BULK AND SURFACE ELECTRONIC STATES OF ORDEREDCu3Au(001): AN ANGLE-RESOLVED PHOTOEMISSION INVESTIGATION,"
Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(05n06), pages 1749-1761.
Handle:
RePEc:wsi:srlxxx:v:03:y:1996:i:05n06:n:s0218625x96002680
DOI: 10.1142/S0218625X96002680
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