Apr 15, 1996
Extended van hove singularity in a noncuprate layered superconductor sr2RuO4
Physical Review Letters
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- Volume
- 76
- Number
- 16
- First page
- 3009
- Last page
- 3012
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevLett.76.3009
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. © 1996 The American Physical Society.
- Link information
- ID information
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- DOI : 10.1103/PhysRevLett.76.3009
- ISSN : 1079-7114
- ISSN : 0031-9007
- SCOPUS ID : 4243775843