Angle-resolved and resonant photoemission study of Sr2RuO4

Takayoshi Yokoya, A. Chainani, T. Takahashi, H. Katayama-Yoshida, M. Kasai, Y. Tokura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Resonant and angle-resolved photoemission measurements were performed for the non-cuprate layered superconductor Sr2RuO4 (Tc = 0.93 K). Resonant valence band photoemission spectroscopy shows the existence of a correlation induced satellite to the main d band across the Ru 4p-4d threshold. Angle-resolved measurements show a surprisingly narrow band of about 50 meV width and positioned at 26 meV below the Fermi level, along the ΓX and ΓZ directions. This band, arising fom Ru 4d-O 2p antibonding states, is nearly dispersionless over a wide range of k points about the zone boundary along the Γ-Z direction (Ru-O direction), reminiscent of the extended Van-Hove singularity observed in the cuprates. The results emphasize the presence of strong correlations, substantial charge-transfer character to states at the Fermi level and the existence of a singular flat band near the Fermi-level in this low Tc layered superconductor, just like the cuprates.

Original languageEnglish
Pages (from-to)1885-1886
Number of pages2
JournalJournal of Physics and Chemistry of Solids
Volume56
Issue number12
Publication statusPublished - Dec 1995
Externally publishedYes

Fingerprint

Photoemission
Fermi level
photoelectric emission
Superconducting materials
cuprates
Angle measurement
Photoelectron spectroscopy
Valence bands
Charge transfer
trucks
Satellites
narrowband
charge transfer
valence
thresholds
Direction compound
spectroscopy

Keywords

  • angle-resolved photoemission
  • charge-transfer character
  • Non-cuprate layered superconductor
  • resonant photoemission
  • SrRuO
  • strong correlations
  • Van-Hove singularity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)
  • Chemistry(all)
  • Electronic, Optical and Magnetic Materials

Cite this

Yokoya, T., Chainani, A., Takahashi, T., Katayama-Yoshida, H., Kasai, M., & Tokura, Y. (1995). Angle-resolved and resonant photoemission study of Sr2RuO4. Journal of Physics and Chemistry of Solids, 56(12), 1885-1886.

Angle-resolved and resonant photoemission study of Sr2RuO4. / Yokoya, Takayoshi; Chainani, A.; Takahashi, T.; Katayama-Yoshida, H.; Kasai, M.; Tokura, Y.

In: Journal of Physics and Chemistry of Solids, Vol. 56, No. 12, 12.1995, p. 1885-1886.

Research output: Contribution to journalArticle

Yokoya, T, Chainani, A, Takahashi, T, Katayama-Yoshida, H, Kasai, M & Tokura, Y 1995, 'Angle-resolved and resonant photoemission study of Sr2RuO4', Journal of Physics and Chemistry of Solids, vol. 56, no. 12, pp. 1885-1886.
Yokoya T, Chainani A, Takahashi T, Katayama-Yoshida H, Kasai M, Tokura Y. Angle-resolved and resonant photoemission study of Sr2RuO4. Journal of Physics and Chemistry of Solids. 1995 Dec;56(12):1885-1886.
Yokoya, Takayoshi ; Chainani, A. ; Takahashi, T. ; Katayama-Yoshida, H. ; Kasai, M. ; Tokura, Y. / Angle-resolved and resonant photoemission study of Sr2RuO4. In: Journal of Physics and Chemistry of Solids. 1995 ; Vol. 56, No. 12. pp. 1885-1886.
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