Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4

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

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

Angle-resolved photoemission spectroscopy was performed on a ruthenate superconductor Sr2RuO4 (Tc ∼ 1 K) which has the same crystal structure as La2CuO4, but with RuO2 layers replacing CuO2 layers. Sr2RuO4 shows an extended Van Hove singularity (VHS) at 20 ± 2 meV below EF just like the cuprates, regardless of the character of the electronic states at EF. This suggests that the extended VHS is a general feature of a two-dimensional correlated d-electron metal. The observed Fermi surface is in contrast to local-density-approximation calculations.

Original languageEnglish
Pages (from-to)3009-3012
Number of pages4
JournalPhysical Review Letters
Volume76
Issue number16
Publication statusPublished - Apr 15 1996
Externally publishedYes

Fingerprint

cuprates
Fermi surfaces
photoelectric emission
crystal structure
approximation
electronics
metals
spectroscopy
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Yokoya, T., Chainani, A., Takahashi, T., Katayama-Yoshida, H., Kasai, M., & Tokura, Y. (1996). Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4. Physical Review Letters, 76(16), 3009-3012.

Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4. / Yokoya, Takayoshi; Chainani, A.; Takahashi, T.; Katayama-Yoshida, H.; Kasai, M.; Tokura, Y.

In: Physical Review Letters, Vol. 76, No. 16, 15.04.1996, p. 3009-3012.

Research output: Contribution to journalArticle

Yokoya, T, Chainani, A, Takahashi, T, Katayama-Yoshida, H, Kasai, M & Tokura, Y 1996, 'Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4', Physical Review Letters, vol. 76, no. 16, pp. 3009-3012.
Yokoya T, Chainani A, Takahashi T, Katayama-Yoshida H, Kasai M, Tokura Y. Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4. Physical Review Letters. 1996 Apr 15;76(16):3009-3012.
Yokoya, Takayoshi ; Chainani, A. ; Takahashi, T. ; Katayama-Yoshida, H. ; Kasai, M. ; Tokura, Y. / Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4. In: Physical Review Letters. 1996 ; Vol. 76, No. 16. pp. 3009-3012.
@article{16f8346e2af8451884fe1d669c387e50,
title = "Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4",
abstract = "Angle-resolved photoemission spectroscopy was performed on a ruthenate superconductor Sr2RuO4 (Tc ∼ 1 K) which has the same crystal structure as La2CuO4, but with RuO2 layers replacing CuO2 layers. Sr2RuO4 shows an extended Van Hove singularity (VHS) at 20 ± 2 meV below EF just like the cuprates, regardless of the character of the electronic states at EF. This suggests that the extended VHS is a general feature of a two-dimensional correlated d-electron metal. The observed Fermi surface is in contrast to local-density-approximation calculations.",
author = "Takayoshi Yokoya and A. Chainani and T. Takahashi and H. Katayama-Yoshida and M. Kasai and Y. Tokura",
year = "1996",
month = "4",
day = "15",
language = "English",
volume = "76",
pages = "3009--3012",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "16",

}

TY - JOUR

T1 - Extended Van Hove singularity in a noncuprate layered superconductor Sr2RuO4

AU - Yokoya, Takayoshi

AU - Chainani, A.

AU - Takahashi, T.

AU - Katayama-Yoshida, H.

AU - Kasai, M.

AU - Tokura, Y.

PY - 1996/4/15

Y1 - 1996/4/15

N2 - Angle-resolved photoemission spectroscopy was performed on a ruthenate superconductor Sr2RuO4 (Tc ∼ 1 K) which has the same crystal structure as La2CuO4, but with RuO2 layers replacing CuO2 layers. Sr2RuO4 shows an extended Van Hove singularity (VHS) at 20 ± 2 meV below EF just like the cuprates, regardless of the character of the electronic states at EF. This suggests that the extended VHS is a general feature of a two-dimensional correlated d-electron metal. The observed Fermi surface is in contrast to local-density-approximation calculations.

AB - Angle-resolved photoemission spectroscopy was performed on a ruthenate superconductor Sr2RuO4 (Tc ∼ 1 K) which has the same crystal structure as La2CuO4, but with RuO2 layers replacing CuO2 layers. Sr2RuO4 shows an extended Van Hove singularity (VHS) at 20 ± 2 meV below EF just like the cuprates, regardless of the character of the electronic states at EF. This suggests that the extended VHS is a general feature of a two-dimensional correlated d-electron metal. The observed Fermi surface is in contrast to local-density-approximation calculations.

UR - http://www.scopus.com/inward/record.url?scp=4243775843&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243775843&partnerID=8YFLogxK

M3 - Article

VL - 76

SP - 3009

EP - 3012

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

ER -