Quasi 1D topological nodal superconducting vortex line state in doped 3D Dirac Semimetals

ORAL

Abstract

We study the vortex bound states in three dimensional (3D) Dirac semimetals with both time reversal symmetry and inversion symmetry. Assuming two Dirac points on the kz-axis and bulk s-wave superconductivity, the results turn out to be strongly anisotropic: if the vortex line is perpendicular to the kz-direction, the bulk
superconductor plus a single quantum vortex line is always topologically trivial; if the vortex line is parallel to
the kz-direction, the system has a robust quasi 1D topological nodal superconductor phase, for certain range of
doping level. The emergence of the nodal superconductor phase is a reflection of the topological property of
the Dirac point. Finally, we discuss the possible material realization of such nodal superconducting vortex line
state.

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Presenters

  • Shengshan Qin

    Kavli Institute of Theoretical Sciences

Authors

  • Shengshan Qin

    Kavli Institute of Theoretical Sciences

  • Lun Hu

    Department of Physics, University of California, San Diego, California 92093, USA, Department of Physics, University of California, San Diego

  • Congcong Le

    Kavli Institute for Theoretical Sciences, Kavli Institute of Theoretical Sciences, Chinese Academy of Sciences

  • Jinfeng Zeng

    Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Fu-Chun Zhang

    Kavli Institute of Theoretical Sciences, Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences

  • Chen Fang

    Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, Institute of physics, Chinese Academy of Sciences

  • Jiangping Hu

    Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, Institute of Physics, Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China