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The superconductivity of Sr2RuO4 under c-axis uniaxial stress

Author

Listed:
  • Fabian Jerzembeck

    (Max Planck Institute for Chemical Physics of Solids)

  • Henrik S. Røising

    (Nordita, KTH Royal Institute of Technology and Stockholm University)

  • Alexander Steppke

    (Max Planck Institute for Chemical Physics of Solids)

  • Helge Rosner

    (Max Planck Institute for Chemical Physics of Solids)

  • Dmitry A. Sokolov

    (Max Planck Institute for Chemical Physics of Solids)

  • Naoki Kikugawa

    (National Institute for Materials Science)

  • Thomas Scaffidi

    (University of Toronto
    University of California)

  • Steven H. Simon

    (Rudolf Peierls Center for Theoretical Physics)

  • Andrew P. Mackenzie

    (Max Planck Institute for Chemical Physics of Solids
    University of St. Andrews)

  • Clifford W. Hicks

    (Max Planck Institute for Chemical Physics of Solids
    University of Birmingham)

Abstract

Applying in-plane uniaxial pressure to strongly correlated low-dimensional systems has been shown to tune the electronic structure dramatically. For example, the unconventional superconductor Sr2RuO4 can be tuned through a single Van Hove point, resulting in strong enhancement of both Tc and Hc2. Out-of-plane (c axis) uniaxial pressure is expected to tune the quasi-two-dimensional structure even more strongly, by pushing it towards two Van Hove points simultaneously. Here, we achieve a record uniaxial stress of 3.2 GPa along the c axis of Sr2RuO4. Hc2 increases, as expected for increasing density of states, but unexpectedly Tc falls. As a first attempt to explain this result, we present three-dimensional calculations in the weak interaction limit. We find that within the weak-coupling framework there is no single order parameter that can account for the contrasting effects of in-plane versus c-axis uniaxial stress, which makes this new result a strong constraint on theories of the superconductivity of Sr2RuO4.

Suggested Citation

  • Fabian Jerzembeck & Henrik S. Røising & Alexander Steppke & Helge Rosner & Dmitry A. Sokolov & Naoki Kikugawa & Thomas Scaffidi & Steven H. Simon & Andrew P. Mackenzie & Clifford W. Hicks, 2022. "The superconductivity of Sr2RuO4 under c-axis uniaxial stress," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32177-4
    DOI: 10.1038/s41467-022-32177-4
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    References listed on IDEAS

    as
    1. A. Pustogow & Yongkang Luo & A. Chronister & Y.-S. Su & D. A. Sokolov & F. Jerzembeck & A. P. Mackenzie & C. W. Hicks & N. Kikugawa & S. Raghu & E. D. Bauer & S. E. Brown, 2019. "Constraints on the superconducting order parameter in Sr2RuO4 from oxygen-17 nuclear magnetic resonance," Nature, Nature, vol. 574(7776), pages 72-75, October.
    2. Vadim Grinenko & Debarchan Das & Ritu Gupta & Bastian Zinkl & Naoki Kikugawa & Yoshiteru Maeno & Clifford W. Hicks & Hans-Henning Klauss & Manfred Sigrist & Rustem Khasanov, 2021. "Unsplit superconducting and time reversal symmetry breaking transitions in Sr2RuO4 under hydrostatic pressure and disorder," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
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