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).

*This work was performed at the NHMFL, which is supported by the NSF Cooperative Agreement No. DMR-1644779 and the State of FL. R.E.B., Y.L., D.G. was partly supported by the CAST EFRC, funded by the US-DOE, BES, under Award No. DE-SC0016568. L.B. is supported by DOE-BES through Award No. DE-SC0002613.

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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