Technique for bulk Fermiology by photoemission applied to layered ruthenates

2004/02/29 by A. Sekiyama, S. Kasai, M. Tsunekawa +15 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.70.060506

published as Phys. Rev. B vol. 70, 060506(R) (2004) · 5 pages, 3 figures including 2 color figures

openalex publication_date 2004/08/20 · arxiv created 2004/09/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report the Fermi surfaces of the superconductor Sr₂RuO₄ and the nonsuperconductor Sr_1.8Ca_0.2RuO₄ 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.

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