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.
N1 - Funding Information:
We would like to thank Y, Maeno for useful discussionsa nd performingt he AC susceptibility measurementWs.e would also like to thank M. Tachiki for helpful discussionsT. Y and AC thank the Japan Societyf or the Promotiono f Sciencef or financiasl upportT. his work was supportebdy grants from the Ministryo f EducationS, ciencea ndCulture and the New Energya ndI ndustriaTl echnologDy e-velopmenOt rganizatio(nN EDO) of Japan.
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
SN - 0921-4534
VL - 263
SP - 505
EP - 509
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 1-4
ER -