Physical Properties of PdSb2 Single Crystals

ORAL

Abstract

Transition-metal dipnictide PdSb2 is a candidate for hosting 6-fold-degenerate exotic fermions (beyond Dirac and Weyl fermions) with degeneracy stabilized by the non-symmorphic symmetry. Such symmetry plays crucial role in electrical transport properties. We have for the first time grown single crystals of PdSb2 and characterized its physical properties. X-ray diffraction measurement shows that PdSb2 forms the Pyrite-type cubic structure (space group 205) at room temperature. Electrical resistivity displays metallic behavior with T2 dependence at low temperatures, indicating the Fermi-liquid ground state. The Hall coefficient is positive and decreases with increasing temperature, consistent with the multiband nature in the electronic structure. However, the transverse magnetoresistance is found to obey the Kohler’s law at all temperatures, indicating only one type (hole-type) of charge carrier dominates the electrical transport. Furthermore, we find appreciable electronic contribution on both thermal conductivity and specific heat of PdSb2. The implication will be discussed based on both experimental observation and theoretical calculations.

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Presenters

  • Ramakanta Chapai

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

Authors

  • Ramakanta Chapai

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

  • Roshan Nepal

    Physics and Astronomy, Louisiana State Univ - Baton Rouge, Physics and Astronomy, Louisiana State University

  • 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