TY - JOUR
T1 - Angle-resolved photoemission study of Sr2RuO4; An extended van-Hove singularity in non-cuprate superconductor
AU - Takahashi, T.
AU - Yokoya, T.
AU - Chainani, A.
AU - Ding, H.
AU - Campuzano, J. C.
AU - Kasai, M.
AU - Tokura, Y.
N1 - Funding Information:
ACKNOWLEDGMENTS This work was supported by grants from the CREST and the Ministry of Education, Science and Culture of Japan, and the U. S. Dept. of Energy, Basic Energy Sciences, under contract W-31-109-ENG-38.
PY - 1997/8
Y1 - 1997/8
N2 - 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.
AB - 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.
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U2 - 10.1016/S0921-4534(97)00208-6
DO - 10.1016/S0921-4534(97)00208-6
M3 - Article
AN - SCOPUS:0031200122
SN - 0921-4534
VL - 282-287
SP - 218
EP - 221
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - PART 1
ER -