Relationship between Superconductivity and Antiferromagnetic Fluctuations in FeSe<sub>0.9</sub>S<sub>0.1</sub> under Pressure Studied by<sup> 77</sup>Se NMR

ORAL

Abstract

Magnetic fluctuations and/or nematic fluctuations are considered to be candidates for the pairing mechanism in unconventional superconductors such as iron pnictide superconductors. Quite recently nuclear magnetic resonance (NMR) measurements revealed strong correlation between superconductivity and antiferromagnetic (AFM) fluctuations despite being near a nematic quantum critical point in FeSe1−xSx [1]. To understand the quantitative relationship between superconductivity and magnetic fluctuations, we carried out 77Se NMR on the optimally doped FeSe0.9S0.1 under pressure. In this presentation, we will report the NMR results, especially temperature dependence of nuclear spin lattice relaxation rate under different pressures. Upon analyzing the new together with the previous data [1,2] we will discuss the relationship between AFM fluctuations and superconductivity in the system.

[1] P. Wiecki, et al., Phys. Rev. B 98, 020507(R) (2018).
[2] P. Wiecki, et al., Phys. Rev. B 96, 180502(R) (2017).

*This work is supported by the USDOE, Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-07CH11358

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Presenters

  • Khusboo Rana

    • Ames Lab & Dept of Physics and Astronomy, Iowa State University

Authors

  • Khusboo Rana

    • Ames Lab & Dept of Physics and Astronomy, Iowa State University

  • Paul Wiecki

    • Institut für Festkörperphysik, Karlsruhe Institute of Technology

  • Anna Boehmer

    • Ames Laboratory/Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Institut für Festkörperphysik, Karlsruhe Institute of Technology

  • Sergey Budko

    • Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Physics, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory

  • Paul Canfield

    • Ames Laboratory and Dept. of Physics, Iowa State University
    • Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA.
    • Ames Laboratory
    • Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory, Iowa State University
    • Ames Laboratory/Iowa State University
    • Iowa State University and Ames Laboratory
    • Ames Laboratory and Iowa State University, Ames, IA, USA
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Department of Physics & Astronomy, Iowa State University
    • Department of physics and astronomy, Iowa State University/Ames Laboratory
    • Physics, Iowa State University/Ames Laboratory
    • Ames Laboratory & Iowa State University
    • Physics, Iowa State University

  • Yuji Furukawa

    • Ames Laboratory, Iowa State University
    • Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA
    • Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ.
    • Iowa State University & Ames Lab
    • Ames Lab & Dept of Physics and Astronomy, Iowa State University
    • Iowa State University