High-resolution angle-resolved photoemission study of non cuprate two-dimensional superconductor Sr2RuO4

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

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Abstract

High-resolution angle-resolved photoemission spectroscopy has been carried out on a ruthenate superconductor Sr2RuO4 (Tc ∼ 1 K), which has the same crystal structure as La2CuO4, but with RuO2 layers replacing the CuO2, and exhibits T2 dependence of electrical resistivity below 25 K. The results show that the electronic structure of Sr2RuO4 has an extended van-Hove singularity (VHS) near EF in a quite similar manner to the high Tc cuprates, regardless of the character of the electronic states near EF. This requests reexamination of the VHS scenario and its relation to both the normal and superconducting properties.

Original languageEnglish
Pages (from-to)171-174
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume78
Publication statusPublished - May 1996
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Yokoya, T., Akaki, O., Kumigashira, H., Chainani, A., Takahashi, T., Katayama-Yoshida, H., Kasai, M., & Tokura, Y. (1996). High-resolution angle-resolved photoemission study of non cuprate two-dimensional superconductor Sr2RuO4. Journal of Electron Spectroscopy and Related Phenomena, 78, 171-174.