Anomalous off-diagonal thermal response in Mn$_{3}$Ge

ORAL

Abstract

We present a study of anomalous transverse response in non-collinear antiferromagnet Mn$_{3}$Ge down to sub-Kelvin temperature. Special attention is paid to the amplitude and temperature dependence of the anomalous Lorenz ratio $L^{A}_{ij}=\kappa^{A}_{ij}/T\sigma^{A}_{ij}$ relative to the Sommerfeld value. The contrast with Mn$_{3}$Sn [1] provides crucial information in the ongoing effort to identify the k-space location of the Weyl points. We also present measurements of the anomalous Ettingshausen and the anomalous Nernst effects in order to verify the Bridgman relation, a consequence of Onsager reciprocity.
[1] Xiaokang Li, PRL 119, 056601 (2017)

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Presenters

  • Zengwei Zhu

    • Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology

Authors

  • Liangcai Xu

    • Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology

  • Xiaokang Li

    • Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology

  • xiufang lu

    • Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology

  • Clement Collignon

    • Laboratoire de Physique Et Etude des Materiaux, ESPCI Paris

  • Alaska Subedi

    • Universite Paris-Saclay
    • Centre de Physique Theorique, Ecole Polytechnique

  • Benoit Fauque

    • Institut de Physique, College de France
    • ESPCI ParisTech
    • Laboratoire de Physique Et Etude des Materiaux, ESPCI Paris

  • Zengwei Zhu

    • Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology

  • Kamran Behnia

    • ESCPI - CNRS
    • LPEM, ESPCI
    • ESPCI ParisTech
    • Laboratoire de Physique Et Etude des Materiaux, ESPCI Paris