Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-02-25
Phys. Rev. B vol. 70, 060506(R) (2004)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 3 figures including 2 color figures
Scientific paper
10.1103/PhysRevB.70.060506
We report the Fermi surfaces of the superconductor Sr2RuO4 and the non-superconductor Sr1.8Ca0.2RuO4 probed by bulk-sensitive high-energy angle-resolved photoemission. It is found that there is one square-shaped hole-like, one square-shaped electron-like and one circle-shaped electron-like Fermi surface in both compounds. These results provide direct evidence for nesting instability giving rise to magnetic fluctuations. Our study clarifies that the electron correlation effects are changed with composition depending on the individual band.
Imada Shin
Irizawa Akinori
Ishida Yasuchika
Kasai Satoshi
Kimura Tadahiko
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