Manipulation of the time-reversal symmetry breaking superconductivity in Sr<sub>2</sub>RuO<sub>4</sub> by uniaxial stress

ORAL

Abstract


The symmetry of the unconventional superconducting state of Sr2RuO4 continues to be under strong debate [1]. In general, time-reversal-symmetry breaking (TRSB) superconductivity indicates two-component order parameters. Probing Sr2RuO4 under uniaxial stress offers the possibility to lift the degeneracy between such components. One key prediction for Sr2RuO4, a splitting of the superconducting and TRSB transitions under uniaxial stress has not been observed so far. We report measurements of zero-field muon spin relaxation (μSR) on samples under uniaxial stresses of up to ∼1.05 GPa. We observe a stress-induced splitting between the onset temperatures of superconductivity and TRSB, consistent with qualitative expectations for a chiral order parameter. In addition, we report the appearance of a bulk magnetic order under the uniaxial stress of ∼1.0 GPa [2]. A custom pressure cell was developed to perform μSR under uniaxial stress[3].

References:
[1] Kivelson et al. npj Qua Mat. 5, 43 (2020).
[2] V. Grinenko*, S. Ghosh* et al., https://www.nature.com/articles/s41567-021-01182-7#Abs1.'
[3] S. Ghosh et al., Rev. Sci. Inst. 91, 103902 (2020).
**This work was supported by DFG (GR 4667, GRK 1621, SFB 1143).

**This work was supported by DFG (GR 4667, GRK 1621, SFB 1143).

–

Presenters

  • Shreenanda Ghosh

    • Institute for Solid State and Materials Physics, Technical University of Dresden, Germany

Authors

  • Shreenanda Ghosh

    • Institute for Solid State and Materials Physics, Technical University of Dresden, Germany

  • Vadim Grinenko

    • Institute for Solid State and Materials Physics, Technische Universitat Dresden
    • Institute for Solid State and Materials Physics, Technical University of Dresden, Germany

  • Rajib Sarkar

    • Institute for Solid State and Materials Physics, Technical University of Dresden, Germany

  • Felix Bruckner

    • Institute for Solid State and Materials Physics, Technische Universitat Dresden
    • Institute for Solid State and Materials Physics, Technical University of Dresden, Germany

  • Jean-Christophe Orain

    • Paul Scherrer Institute, Bulk MUSR group, LMU 5232 Villigen PSI, Switzerland
    • Laboratory for Muon spin spectroscopy, Paul Scherrer Institute, Villigen, Switzerland

  • Artem Nikitin

    • Laboratory for Muon spin spectroscopy, Paul Scherrer Institute, Villigen, Switzerland

  • Joonbum Park

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Mark E Barber

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Naoki Kikugawa

    • National Institute for Materials Science, Tsukuba, Japan
    • National Institute for Material Science, Tsukuba Japan
    • National Institute for Materials Science
    • National Institute for Material Science, Japan

  • Jake Bobowski

    • Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Japan

  • Dmitry Sokolov

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute for the Chemical Physics of Solids

  • YOSHITERU Maeno

    • Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Japan

  • Andrew P. Mackenzie

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Hubertus Luetkens

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute
    • Laboratory for Muon spin spectroscopy, Paul Scherrer Institute, Villigen, Switzerland

  • Clifford W Hicks

    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
    • Max Planck Institute for Chemical Physics of Solids
    • Chemical Physics of Solids, Max Planck Institute
    • Max Planck Institute for the Chemical Physics of Solids

  • Hans-Henning Klauss

    • Institute for Solid State and Materials Physics, Technische Universitat Dresden
    • Institute for Solid State and Materials Physics, Technical University of Dresden, Germany