Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have performed low-temperature high-resolution angle-resolved photoemission spectroscopy on a non-cuprate superconductor Sr2RuO4 (Tc ∼ 1 K) which has the same crystal structure as La2CuO4 but with RuO2 layers replacing CuO2. We found that Sr2RuO4 has an extended van-Hove singularity (VHS) close to EF(20 ± 2 meV) like high-Tc cuprates, regardless of the character of the electronic states at EF, suggesting that the extended VHS is a general feature of a two-dimensional d-electron metal. This demands re-examination of the VHS scenario for the superconducting properties of cuprates, while T-linear resistivity seems to be consistent with this result.

Original languageEnglish
Pages (from-to)505-509
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume263
Issue number1-4
Publication statusPublished - May 1996
Externally publishedYes

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Photoemission
Electronic states
Photoelectron spectroscopy
trucks
Superconducting materials
photoelectric emission
Crystal structure
Metals
cuprates
Electrons
Temperature
examination
electrical resistivity
crystal structure
high resolution
electronics
metals
spectroscopy
La2CuO4
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Yokoya, T., Chainani, A., Takahashi, T., Katayama-Yoshida, H., Kasai, M., & Tokura, Y. (1996). Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission. Physica C: Superconductivity and its Applications, 263(1-4), 505-509.

Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission. / Yokoya, Takayoshi; Chainani, A.; Takahashi, T.; Katayama-Yoshida, H.; Kasai, M.; Tokura, Y.

In: Physica C: Superconductivity and its Applications, Vol. 263, No. 1-4, 05.1996, p. 505-509.

Research output: Contribution to journalArticle

Yokoya, T, Chainani, A, Takahashi, T, Katayama-Yoshida, H, Kasai, M & Tokura, Y 1996, 'Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission', Physica C: Superconductivity and its Applications, vol. 263, no. 1-4, pp. 505-509.
Yokoya T, Chainani A, Takahashi T, Katayama-Yoshida H, Kasai M, Tokura Y. Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission. Physica C: Superconductivity and its Applications. 1996 May;263(1-4):505-509.
Yokoya, Takayoshi ; Chainani, A. ; Takahashi, T. ; Katayama-Yoshida, H. ; Kasai, M. ; Tokura, Y. / Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission. In: Physica C: Superconductivity and its Applications. 1996 ; Vol. 263, No. 1-4. pp. 505-509.
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