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Two-fold symmetric anomalous angular magnetoresistance of the proposed tetragonal Weyl semimetal CeAlGe

ORAL · Invited

Abstract

A noncentrosymmetric tetragonal compound CeAlGe, a proposed type-II Weyl semimetal, orders antiferromagnetically below 5 K in zero magnetic field. In the magnetically ordered state, the moment lies in the tetragonal ab-plane and thus the M(H) data show a four-fold symmetry along the principal directions in the ab-plane. However, anomalously robust and complex two-fold symmetry is observed in the angular dependence of resistivity and magnetic torque data in the magnetically ordered state once the field is swept in the ab-plane. This two-fold symmetry is independent of temperature and field-hystereses. We will show that this anomalous behavior is the result of the complex magnetic structures and the phase transition between them, and that the critical field of that phase transition can be tuned by an Al deficiency.

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Publication: H. Hodovanets, C. J. Eckberg, D. J. Campbell, Y. Eo, P. Y. Zavalij, P. Piccoli, T. Metz, H. Kim, J. S. Higgins, and J. Paglione, Anomalous symmetry breaking in the Weyl semimetal CeAlGe, Phys. Rev. B 106, 235102 (2022)

Presenters

  • Halyna Hodovanets

    Missouri University of Science and Technology, Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

Authors

  • Halyna Hodovanets

    Missouri University of Science and Technology, Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • Halyna Hodovanets

    Missouri University of Science and Technology, Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • C. J Eckberg

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • D. J Campbell

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • Y. Eo

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • P. Y Zavalij

    X-ray Crystallographic Center, Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 2074, USA

  • P. M Piccoli

    Department of Geology, University of Maryland, College Park, Maryland 20742, USA

  • T. Metz

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • Hyunsoo Kim

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA, Missouri University of Science & Technology

  • J. S Higgins

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • J. Paglione

    Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA