Nature of the electronic states in the layered perovskite noncuprate superconductor Sr{sub 2}RuO{sub 4}
- Forschungszentrum Karlsruhe, Institut fuer Nukleare Festkoerperphysik, Postfach 3640, D-76021 Karlsruhe (Germany)
- VARTA Batterie AG, R&D Center, 65779 Kelkheim (Germany)
Near-edge x-ray-absorption and photoemission spectra of the noncuprate superconductor Sr{sub 2}RuO{sub 4} are presented. Holes close to the Fermi level are determined by Ru 4{ital d}{sub {ital xy}}, 4{ital d}{sub {ital xz}}, and 4{ital d}{sub {ital yz}} antibonding states. The density of the occupied states at the Fermi level derived from photoemission is higher than in the cuprates and these states have predominantly Ru 4{ital d} character. Angle-resolved photoemission yields a width of the occupied part of the conduction bands that is reduced by a factor of 2 in comparison to band-structure calculations. The importance of electron correlations is also evident in the appearance of screened final states in the Ru 3{ital d} core-level spectrum. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 284717
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 22 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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