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Searching non-trivial topological phases in nonsymmorphic CeAuBi<sub>2</sub>

ORAL

Abstract


Nonsymmorphic structures are promising to host Dirac and Weyl fermions due to the presence of protected band crossings. The Kondo effect, present in Ce-based compounds, may pin these crossings to the Fermi level, favoring non-trivial topological effects. Here, we report the properties of stoichiometric CeAuBi2. It crystallizes in the ZrSiS tetragonal P4/nmm nonsymmorphic structure and orders antiferromagnetically below 19 K with a propagation vector (0 0 1/2). At low temperatures, magnetic fields parallel to the c-axis induce several metamagnetic transitions, similar to CeAuSb2, and a linear positive magnetoresistance is observed, which suggests the presence of band crossings near the Fermi level. The application of external pressure favors the antiferromagnetism. Finally, neutron magnetic diffraction as a function of magnetic field will be discussed.

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Presenters

  • Mario Moda Piva

    Max Planck Institute for Chemical Physics of Solids

Authors

  • Mario Moda Piva

    Max Planck Institute for Chemical Physics of Solids

  • Eleanor M. Clements

    NIST Center for Neutron Research

  • Rodolfo Tartaglia

    “Gleb Wataghin” Institute of Physics, University of Campinas, Instituto de Física “Gleb Wataghin”, UNICAMP

  • Gabriel S. Freitas

    Instituto de Física “Gleb Wataghin”, UNICAMP

  • Jean Souza

    UNICAMP-Univ de Campinas, Instituto de Física “Gleb Wataghin”, UNICAMP

  • Denise S. Christovam

    Instituto de Física “Gleb Wataghin”, UNICAMP

  • Sean Thomas

    Los Alamos National laboratory, Los Alamos National Laboratory

  • Juscelino B. Leao

    NIST Center for Neutron Research

  • William Ratcliff

    National Institute of Standards and Technology, NIST Center for Neutron Research

  • Jeffrey W Lynn

    Center for Neutron Research, National Institute of Standards and Technology, NIST Center for Neutron Research, National Institute of Standards and Technology, Quantum Materials Center, University of Maryland, College Park, NIST Center for Neutron Research, National Institute of Standards and Technology

  • Christopher Lane

    Los Alamos National Laboratory, Theoretical Division (T-4) / CINT, Los Alamos National Laboratory

  • Jian-Xin Zhu

    Los Alamos Natl Lab, Los Alamos National Laboratory, Theoretical Division/Center for Integrated Nanotechnology, Los Alamos National Laboratory, Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Lab, Center for Integrated Nanotechnologies, Los Alamos National Laboratory

  • Joe Thompson

    Los Alamos National Lab, Los Alamos National laboratory, Los Alamos National Laboratory

  • Priscila Rosa

    Los Alamos National Lab, Los Alamos National Laboratory, Quantum Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

  • Cris Adriano

    UNICAMP-Univ de Campinas, Instituto de Física “Gleb Wataghin”, UNICAMP

  • Eduardo Granado

    UNICAMP - Universidade Estadual de Campinas, “Gleb Wataghin” Institute of Physics, University of Campinas, Instituto de Física “Gleb Wataghin”, UNICAMP

  • Pascoal G. Pagliuso

    UNICAMP-Univ de Campinas, Instituto de Física “Gleb Wataghin”, UNICAMP