Evidence for correlation effects in Sr{sub 2}RuO{sub 4} from resonant and x-ray photoemission spectroscopy
- Department of Physics, Tohoku University, Sendai 980-77 (Japan)
- Joint Research Center for Atom Technology (JRCAT), Tsukuba 305 (Japan)
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)
We study the electronic structure of Sr{sub 2}RuO{sub 4}, a noncuprate layered superconductor ({ital T}{sub {ital c}}=0.93 K), using electron spectroscopy. X-ray photoemission spectroscopy shows that the single particle occupied density of states (DOS) is in fair agreement with the calculated DOS. However, resonant photoemission spectroscopy across the Ru 4{ital p}-4{ital d} threshold establishes the existence of a correlation satellite to the Ru 4{ital d} band. The results indicate substantial charge-transfer character at the Fermi level, with on-site correlations {ital U}{sub {ital dd}} comparable in magnitude to the Ru-O hopping integral, like the cuprates. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 279788
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 53; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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