Angle-resolved photoemission study of Sr2RuO4; An extended van-Hove singularity in non-cuprate superconductor

T. Takahashi, Takayoshi Yokoya, A. Chainani, H. Ding, J. C. Campuzano, M. Kasai, Y. Tokura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of a non-cuprate layered superconductor Sr2RuO4 to study the electronic structure near the Fermi level (EF). The result shows an extended van Hove singularity (vHs) along the Ru-O bonding direction just like the cuprate, regardless of the character of the electronic states at EF. This suggests that the extended vHs is a general electronic structure of a two dimensional correlated d-electron metal. We also have found that the observed Fermi surface topology (one electron-like Fermi surface sheet centered at Γ point and two hole-like ones centered at X point) is qualitatively different from the calculated Fermi surface topology (two electron-like Fermi sheets centered at Γ point and one hole-like one centered at X point) in the consequence of the existence of the vHs.

Original languageEnglish
Pages (from-to)218-221
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume282-287
Issue numberPART 1
Publication statusPublished - Aug 1997
Externally publishedYes

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Fermi surface
Photoemission
trucks
Superconducting materials
Fermi surfaces
photoelectric emission
Electronic structure
Electrons
topology
Topology
electronic structure
electrons
Electronic states
Photoelectron spectroscopy
Fermi level
cuprates
Metals
high resolution
electronics
metals

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Takahashi, T., Yokoya, T., Chainani, A., Ding, H., Campuzano, J. C., Kasai, M., & Tokura, Y. (1997). Angle-resolved photoemission study of Sr2RuO4; An extended van-Hove singularity in non-cuprate superconductor. Physica C: Superconductivity and its Applications, 282-287(PART 1), 218-221.

Angle-resolved photoemission study of Sr2RuO4; An extended van-Hove singularity in non-cuprate superconductor. / Takahashi, T.; Yokoya, Takayoshi; Chainani, A.; Ding, H.; Campuzano, J. C.; Kasai, M.; Tokura, Y.

In: Physica C: Superconductivity and its Applications, Vol. 282-287, No. PART 1, 08.1997, p. 218-221.

Research output: Contribution to journalArticle

Takahashi, T, Yokoya, T, Chainani, A, Ding, H, Campuzano, JC, Kasai, M & Tokura, Y 1997, 'Angle-resolved photoemission study of Sr2RuO4; An extended van-Hove singularity in non-cuprate superconductor', Physica C: Superconductivity and its Applications, vol. 282-287, no. PART 1, pp. 218-221.
Takahashi, T. ; Yokoya, Takayoshi ; Chainani, A. ; Ding, H. ; Campuzano, J. C. ; Kasai, M. ; Tokura, Y. / Angle-resolved photoemission study of Sr2RuO4; An extended van-Hove singularity in non-cuprate superconductor. In: Physica C: Superconductivity and its Applications. 1997 ; Vol. 282-287, No. PART 1. pp. 218-221.
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