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Journal Article

Normal state, superconductivity and quasiparticle Fermi surface of the strongly correlated oxide Sr2RuO4

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Julian, S. R., Mackenzie, A. P., Lonzarich, G. G., Bergemann, C., Haselwimmer, R. K. W., Maeno, Y., et al. (1999). Normal state, superconductivity and quasiparticle Fermi surface of the strongly correlated oxide Sr2RuO4. Physica B-Condensed Matter, 259-61, 928-933. doi:10.1016/S0921-4526(98)00820-5.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-EEAE-0
Abstract
The oxide superconductor Sr2RuO4 is emerging as an archetypal strongly correlated electron system. We review the experimental situation, focusing on Fermi surface specific probes. Quantum oscillation measurements have revealed a Fermi surface consisting of three slightly warped cylinders populated by quasiparticles with masses ranging from 3.4 to 14.6 times the bare electron mass. Then is strong evidence that Sr2RuO4 is a spin-triplet superconductor, and the simplicity of the Fermi surface combined with detailed knowlege of the quasiparticle properties from quantum oscillation and orbital specific NMR measurements means that Sr2RuO4 may be a key system for understanding unconventional superconductivity. We compare Sr2RuO4 With three-dimensional nearly ferromagnetic 3d-metals, and suggest that quasi-tno-dimensional spin-fluctuations may be responsible for the fact that Sr2RuO4 is the first nearly ferromagnetic metal to show superconductivity. (C) 1999 Elsevier Science B.V. All rights reserved.