TY - JOUR
T1 - Extended van hove singularity in a noncuprate layered superconductor sr2RuO4
AU - Yokoya, T.
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.
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U2 - 10.1103/PhysRevLett.76.3009
DO - 10.1103/PhysRevLett.76.3009
M3 - Article
AN - SCOPUS:4243775843
SN - 0031-9007
VL - 76
SP - 3009
EP - 3012
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
ER -