Two-Dimensional Fermi Liquid Behavior of the Superconductor Sr 2RuO 4

Yoshiteru Maeno; Koji Yoshida; Hiroaki Hashimoto; Shuji Nishizaki; Shin–ichi Ikeda; Minoru Nohara; Toshizo Fujita; Andrew P. Mackenzie; Nigel E. Hussey; J. Georg Bednorz; Frank Lichtenberg

doi:10.1143/jpsj.66.1405

Two-Dimensional Fermi Liquid Behavior of the Superconductor Sr ₂RuO ₄

Yoshiteru Maeno, Koji Yoshida, Hiroaki Hashimoto, Shuji Nishizaki, Shin–ichi Ikeda, Minoru Nohara, Toshizo Fujita, Andrew P. Mackenzie, Nigel E. Hussey, J. Georg Bednorz, Frank Lichtenberg

Author information

Yoshiteru Maeno
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Koji Yoshida
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Hiroaki Hashimoto
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Shuji Nishizaki
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Shin–ichi Ikeda
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Minoru Nohara
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Toshizo Fujita
Department of Physics, Hiroshima University, Higashi–Hiroshima 739
Andrew P. Mackenzie
Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
Nigel E. Hussey
Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
J. Georg Bednorz
IBM Research Division, Zürich Research Laboratory, CH–8803 Rüschlikon, Switzerland
Frank Lichtenberg
IBM Research Division, Zürich Research Laboratory, CH–8803 Rüschlikon, Switzerland

Keywords: Sr₂RuO₄, Fermi liquid, Wilson ratio, Kadowaki-Woods ratio, anisotropy, specific heat, layered perovskite, superconductor

JOURNAL RESTRICTED ACCESS

1997 Volume 66 Issue 5 Pages 1405-1408

DOI https://doi.org/10.1143/jpsj.66.1405

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Abstract

We report detailed normal state measurements of the resistivity, magnetic susceptibility and specific heat of high-quality single crystals of Sr₂RuO₄, the only copper-free, layered perovskite superconductor (T_c ≈ 1, K). It is intriguing that despite its very strong anisotropy (the ratio of the interlayer to in-plane resistivity exceeds 500) arising from the essentially two-dimensional Fermi surface, the normal state properties are consistent with a universal description for a strongly correlated Fermi liquid. Therefore, Sr₂RuO₄ serves as an ideal reference material for the investigation of the limits of applicability of Fermi liquid theory to other highly correlated layered compounds, including high-T_c cuprates.

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