Study of the Dirac/Weyl candidates (Ce,Nd)Sb(Se,Te)

ORAL

Abstract

The nonsymmorphic compound CeSbTe [1] was recently shown to have coexisting complex magnetism and Weyl/Dirac states, where an applied magnetic field transforms the magnetic order and potentially provides a switch between different electronic states. Here we present results for other members of this family compounds, including CeSbSe [2], NdSbSe, and NdSbTe. CeSbSe exhibits complex magnetic ordering at TM = 3 K and the application of a magnetic field results in a cascade of magnetically ordered states for H < 1.8 T which are characterized by fractional integer size steps: i.e., a possible devil’s staircase is observed. NdSbSe and NdSbTe show a low T buildup of magnetic entropy in the heat capacity, also suggesting complex magnetism. These compounds offer an opportunity to study the connection between the complex magnetic orders, Kondo lattices and topological properties.

[1] Leslie M. Schoop et. al., Sci. Adv. 4, eaar2317 (2018).
[2] Kuan-Wen Chen et. al., PRB 96, 014421 (2017).

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Presenters

  • Kuan-Wen Chen

    Florida State University

Authors

  • Kuan-Wen Chen

    Florida State University

  • You Lai

    Florida State University, National High Magnetic Field Laboratory

  • Kaya Wei

    National High Magnetic Field Laboratory, Florida State University, NHMFL

  • Marein Rahn

    Los Alamos National Laboratory, LANL

  • Yu-Che Chiu

    National High Magnetic Field Laboratory, Florida State University

  • David E Graf

    National High Magnetic Field Laboratory, National High Magnetic Field Lab, Tallahassee, FL, National High Magnetic Field Laboratory and Department of Physics, Florida State University, National High Magnetic Field Lab, NHMFL, Tallahassee, FL, United States, Florida State University, National High Magnetic Field Laboratory, Florida State University, NHMFL-FSU, National High Magnetic Field Laboratory and Florida State University, NHMFL

  • Marc Janoschek

    Los Alamos National Laboratory, LANL

  • Luis Balicas

    National High Magnetic Field Laboratory, Tallahassee, FL-32310, USA., National High Magnetic Field Laboratory, National High Magnetic Field Laboratory FSU, National High Magnetic Field Lab, Florida State University, Tallahassee, USA, NHMFL

  • Ryan Baumbach

    National High Magnetic Field Laboratory, Florida State University, Florida State University, NHMFL-FSU, National High Magnetic Field Laboratory, National High Magnetic Field Laboratory and Florida State University, National High Magnetic Field Laboratory - Florida State University, NHMFL