Growth, structure, and physical properties of CeAlGe and CeAlSi single crystals

ORAL

Abstract

The RAlX (where R=Rare Earth and X=Ge, Si) family has been recently identified as a large class of Weyl semimetal based on systematic first-principles band structure calculations. Because, depending on the rare earth element, RAlX can have no local moment ordering, be ferromagnetic or antiferromagnetic, the family may offer a possibility of realization of all different types of emergent Weyl fermions, i.e. inversion-symmetry breaking and time-reversal breaking, type-I and type-II. Here, we present details of flux growth, crystal structure and physical properties of CeAlGe and CeAlSi single crystals. Both compounds show multiple magnetic transitions with the highest ferromagnetic ordering transition at 5 and 9 K, respectively, and a few metamagnetic transitions in the field-dependant magnetization. Our results are important for all members in the RAlX family.

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Presenters

  • Halyna Hodovanets

    • Ames Laboratory, Iowa State University
    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park

Authors

  • Halyna Hodovanets

    • Ames Laboratory, Iowa State University
    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park

  • Chris Eckberg

    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park
    • Department of Physics, University of Maryland

  • Hyunsoo Kim

    • CNAM, Department of Physics, University of Maryland
    • College Park, MD 20742-4111, Univ of Maryland-College Park
    • Univ of Maryland-College Park

  • Daniel Campbell

    • CNAM, Department of Physics, University of Maryland
    • CNAM, Department of Physics, Univ of Maryland-College Park
    • Univ of Maryland-College Park

  • Peter Zavalij

    • X-ray Crystallographic Center, Department of Chemistry and Biochemistry, University of Maryland

  • Johnpierre Paglione

    • Center for Nanophysics and Advanced Materials , University of Maryland
    • CNAM, Department of Physics, University of Maryland
    • Univ of Maryland-College Park
    • Department of Physics, University of Maryland
    • CNAM, Department of Physics, Univ of Maryland-College Park
    • Univ of Maryland - College Park
    • College Park, MD 20742-4111, Univ of Maryland-College Park
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland
    • Center for Nanophysics and Advanced Materials, University of Maryland
    • University of Maryland, College Park
    • University of Maryland