Magneto and Thermal Transport Properties of Weyl Semimetal BaMnSb2

ORAL

Abstract

Recently, magnetic BaMnSb2 has emerged as an attractive Wyle semimetal candidate with broken time-reversal symmetry. BaMnSb2 crystalizes in a tetragonal structure, consisting of an Sb square net layer critical to form Weyl points. Both in-plane and out-of-plane resistivities (ρab, ρc) show metallic behavior and large anisotropy, indicating quasi-2D electronic structure. By applying magnetic field (up to 35 Tesla) along the c direction, ρab, ρc and Hall resistivity (ρxy) show Shubnikov-de Haas (SdH) oscillations in the low temperature regime. The lowest Landau Level is observed at ~25 T with evidence of Landau level splitting ~20 T. However, there is no sign for SdH oscillations in thermal conductivity, likely due to predominant phonon contribution. The underlying physics will be discussed.

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Presenters

  • Silu Huang

    Louisiana State Univ - Baton Rouge

Authors

  • Silu Huang

    Louisiana State Univ - Baton Rouge

  • William Shelton

    Cain Department of Chemical Engineering, Louisiana State University, Cain Department of Chemical Engineering, Louisiana state University, Louisiana State Univ - Baton Rouge, Cain Department of Chemical Engineering , Louisiana State University

  • E Plummer

    Physics and Astronomy, Louisiana State Univ - Baton Rouge, Department of Physcis and Astronomy, Louisiana State University, Louisiana State Univ - Baton Rouge, Department of Physics, Louisiana State University, Dept. of Physics and Astronomy , Louisiana State University, USA, Department of Physics & Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University

  • Rongying Jin

    Department of Physics and Astronomy, Louisiana State University, Physics and Astronomy, Louisiana State Univ - Baton Rouge, Department of Physcis and Astronomy, Louisiana State University, Department of Physics & astronomy, Louisiana state University, Department of Physics, Louisiana State University, Louisiana State Univ - Baton Rouge, Physics and Astronomy, Louisiana State University, Physics, Louisiana State Univ, Department of Physics and Astronomy,, Louisiana State Univ - Baton Rouge