Relationship of Sr{sub 2}RuO{sub 4} to the superconducting layered cuprates

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.1358· OSTI ID:76459

Singh, D J ^[1]

---

1. Complex Systems Theory Branch, Naval Research Laboratory, Washington, D.C. 20375 (United States)

The properties of Sr{sub 2}RuO{sub 4} are discussed in relation to the high-critical-temperature cuprate superconductors. The discussion is based on local-density-approximation band structure and phonon calculations. The electronic structure is highly anisotropic. Three hybridized Ru 4{ital d}--plane O {ital p} bands cross the Fermi energy, yielding cylindrical sheets of Fermi surface. Two of these are electronlike sheets around {Gamma}, while the third is an {ital X}-centered hole surface. The electronlike sheets change topology as the energy is raised leading to Van Hove singularities in close proximity to the Fermi energy. In general, the electronic properties are related to those of the cuprates, with the exception that Coulomb correlations are expected to be much less significant due to the larger bandwidth and smaller on-site energy. Sr{sub 2}RuO{sub 4} is expected to be a very useful reference material for interpreting experiments on the cuprate superconductors.

• OSTI ID: 76459
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CUPRATES
ELECTRONIC STRUCTURE
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
PHONONS
RUTHENIUM OXIDES
STRONTIUM OXIDES