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

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

doi:10.1016/0921-4534(96)00073-1

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

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

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

We have performed low-temperature high-resolution angle-resolved photoemission spectroscopy on a non-cuprate superconductor Sr₂RuO₄ (T_c ∼ 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 E_F(20 ± 2 meV) like high-T_c cuprates, regardless of the character of the electronic states at E_F, 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 language	English
Pages (from-to)	505-509
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	263
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4534(96)00073-1
Publication status	Published - May 1996
Externally published	Yes

Fingerprint

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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. https://doi.org/10.1016/0921-4534(96)00073-1

@article{052e8f2673c842fb839e053ac43f5cec,

title = "Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission",

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.",

author = "T. Yokoya and A. Chainani and T. Takahashi and H. Katayama-Yoshida and M. Kasai and Y. Tokura",

year = "1996",

month = may,

doi = "10.1016/0921-4534(96)00073-1",

language = "English",

volume = "263",

pages = "505--509",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission

AU - Yokoya, T.

AU - Chainani, A.

AU - Takahashi, T.

AU - Katayama-Yoshida, H.

AU - Kasai, M.

AU - Tokura, Y.

PY - 1996/5

Y1 - 1996/5

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0030147038&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030147038&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(96)00073-1

DO - 10.1016/0921-4534(96)00073-1

M3 - Article

AN - SCOPUS:0030147038

VL - 263

SP - 505

EP - 509

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1-4

ER -

Access to Document

10.1016/0921-4534(96)00073-1