Topological Semimetals with Butterfly-like Four-Point Intersecting Ellipses

ORAL

Abstract

Recent years, the exotic properties of topological semimetals have garnered great attention and efforts in seeking for new topological phases and material realization. In this work, we introduce a new type of nodal line, the butterfly-like four-point-intersecting-ellipses (FPIE) residing in a plane. We identify the criteria for the existence of the FPIE in a time reversal invariant spinless fermion system with negligible spin-orbital coupling (SOC). In addition we demonstrate that its emergence is possible in 7 out of 230 space groups, and identify the locations it would emerge in the Brillouin zone (BZ). Using first-principles band structure calculations, we predict a family of compounds as candidates hosting the FPIE in the Fermi surface (FS) with vanishing SOC.

*The work is supported by NSF-Partnership in Research and Education in Materials (PREM) Grants No. DMR-1828019.

–

Presenters

  • XIAOTING ZHOU

    • National Cheng Kung University
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge

Authors

  • XIAOTING ZHOU

    • National Cheng Kung University
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge

  • Hugo Aramberri

    • Luxembourg Inst of Science and Technology
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge

  • Cheng-Yi Huang

    • Academia Sinica
    • Physics and Astronomy, California State University, Northridge
    • Institute of Physics, Academia Sinica, Taipei, Taiwan

  • Maia G Vergniory

    • Donostia International Physics Center
    • Donostia International Physics Center, Donostia-San Sebastian, Spain

  • Hsin Lin

    • Academia Sinica
    • Physics, Academia Sinica
    • Institute of Physics, Academia Sinica, Taipei, Taiwan
    • Institute of Physics, Academia Sinica

  • Nicholas Kioussis

    • California State University, Northridge
    • Physics and Astronomy, California State University, Northridge
    • Department of Physics and Astronomy, California State University, Northridge