Small and nearly isotropic hole-like Fermi surfaces in LiFeAs detected through de Haas--van Alphen effect

ORAL

Abstract

We show a detailed dHvA study unveiling small and nearly isotropic Fermi surface sheets in LiFeAs single crystals, which is not observed by previous dHvA results, as well as the cylindrical electron-like Fermi surfaces. Our results are in partial agreement with the ARPES results, and the small, nearly isotropic Fermi surface should correspond to the hole-like pocket, suggesting a prominent role for the electronic correlations in LiFeAs. The absence of gap nodes, in combination with the coexistence of quasi-two-dimensional and three-dimensional Fermi surfaces, favor an s-wave pairing symmetry for LiFeAs.

–

Authors

  • Bin Zeng

    • National High Magnetic Field Laboratory, Florida State University

  • Daiki Watanabe

    • National High Magnetic Field Laboratory, Florida State University; Department of Physics, Kyoto University

  • Qiu Zhang

    • National High Magnetic Field Laboratory, Florida State University

  • Gang Li

    • National High Magnetic Field Laboratory, Florida State University

  • Tiglet Besara

    • National High Magnetic Field Laboratory, Florida State University

  • Theo Siegrist

    • National High Magnetic Field Laboratory and Department of Chemical and Biomedical Engineering, Florida State University

  • Lingyi Xing

    • Institute of Physics, Chinese Academy of Sciences

  • Xiancheng Wang

    • Institute of Physics, Chinese Academy of Sciences

  • Changqing Jin

    • Institute of Physics, Chinese Academy of Sciences

  • Pallab Goswami

    • National High Magnetic Field Laboratory, Florida State University

  • Michelle Johannes

    • Center for Computational Materials Science, Naval Research Laboratory

  • Luis Balicas

    • National High Magnetic Field Laboratory, Florida State University