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.
| 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 |
| Publication status | Published - May 1996 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission. / Yokoya, Takayoshi; Chainani, A.; Takahashi, T.; Katayama-Yoshida, H.; Kasai, M.; Tokura, Y.
In: Physica C: Superconductivity and its Applications, Vol. 263, No. 1-4, 05.1996, p. 505-509.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Extended van-Hove singularity in Sr2RuO4 observed by angle-resolved photoemission
AU - Yokoya, Takayoshi
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.
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M3 - Article
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 -