Band splitting and signatures of Fermi-arcs in the magnetic Weyl candidate CeBi

ORAL

Abstract

Weyl semimetals are characterized by topologically protected Weyl nodes in the bulk and Fermi-arcs states with momentum-locked spin or chirality on the surface. Among various Weyl semimetals, magnetic Weyl semimetals are particularly attractive because they have fewer, more widely separated Weyl nodes. Additionally, their Weyl nodes can potentially be manipulated by external magnetic field or changes in the local moment ordering. Here we present a scanning tunneling microscopy and quasiparticle interference (QPI) study of the magnetic Weyl semimetal candidate CeBi. In particular, we resolve splitting of the Bi p and Ce d bands of CeBi with 9T external magnetic field, which is the necessary precondition for Weyl nodes. We also observe signatures of Fermi-arcs in the QPI pattern. The QPI-derived band structure of CeBi in different magnetic phases is also studied.

*This work was supported by DOE EFRC, CATS
Swiss National Science foundation Grant P400P2_183890
Gordon and Betty Moore Foundation Grant GBMF4536 and Grant GBMF4411
U.S. DOE, BES, DMSE under Contract No. DE-AC02-07CH11358

–

Presenters

  • Yu Liu

    • Harvard University
    • Department of Physics, Harvard University
    • Physics, Harvard University

Authors

  • Yu Liu

    • Harvard University
    • Department of Physics, Harvard University
    • Physics, Harvard University

  • Christian Matt

    • Harvard University
    • Department of Physics, Harvard University

  • Harris Pirie

    • Harvard University
    • Department of Physics, Harvard University

  • Nathan Drucker

    • Department of Applied Physics, Harvard University

  • Robert-Jan Slager

    • Harvard University
    • Department of Physics, Harvard University
    • Harvard

  • Na Hyun Jo

    • Iowa State University
    • Ames Laboratory, Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University/Ames Laboratory

  • Brinda Kuthanazhi

    • Ames Laboratory, Iowa State University
    • Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory

  • Sergey L. Bud'ko

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames laboratory, Ames, IA
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Iowa State University/Ames Laboratory

  • Paul C Canfield

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames laboratory, Ames, IA
    • Ames Laboratory, Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory

  • Jennifer E. Hoffman

    • Harvard University
    • Physics, Harvard University
    • Department of Physics, Harvard University