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Impact of nematicity on the relationship between antiferromagnetic fluctuations and superconductivity in FeSe0.91S0.09 under pressure

ORAL

Abstract


Relationships between nematicity, antiferromagnetism and superconductivity have been a central theme for studies of iron based superconductors. When these systems undergo a nematic transition, the four-fold rotational symmetry (C4) of antiferromagnetic correlations reduces to two-fold (C2). The positive relationship between antiferromagnetic correlations and superconducting transition temperatures Tc is clearly seen in unconventional superconductors, but does this relationship depend on the symmetry of the correlations? We will present the findings of our high pressure NMR and resistivity study on FeSe0.91S0.09 system [1] demonstrating that this relationship changes with the presence/absence of nematicity and also that C4 symmetric antiferromagnetic correlations are better in enhancing Tc than C2 symmetric counterparts. This discovery gives a novel insight into the relationships between nematicity, antiferromagnetism and superconductivity.

[1] K. Rana, et al., “Impact of nematicity on the relationship between antiferromagnetic fluctuations and superconductivity in FeSe0.91S0.09 under pressure”, Phys. Rev. B. 101, 180503(R) (2020).

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Presenters

  • Khusboo Rana

    Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University

Authors

  • Khusboo Rana

    Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University

  • Li Xiang

    Ames Lab/Iowa State, Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University

  • Paul Wiecki

    Karlsruhe Institute of Technology, Karlsruhe Institute of Technology, Institut für Festkörperphysik

  • RAQUEL DE ALMEIDA RIBEIRO

    Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames Lab

  • Guilherme Gorgen Lesseux

    Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University

  • Anna E. Böhmer

    Ames Laboratory, Iowa State University, Ames; Karlsruhe Institute of Technology, Karlsruhe, Karlsruhe Institute of Technology, Institut für Festkörperphysik

  • Sergey L. Bud'ko

    Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Ames Laboratory, Iowa State University, Ames Laboratory, Iowa State University, Dept. of Physics and Astronomy, Ames, Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames Laboratory/Iowa State University

  • Paul C Canfield

    Iowa State University/ Ames Laboratory, Ames Laboratory, Ames Laboratory, Iowa State University, Iowa State University, Ames Lab/Iowa State, Ames Laboratory, Ames, IA, Iowa State University/AmesLab, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames Laboratory/Iowa State University

  • Yuji Furukawa

    Ames Laboratory, U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University