Thermal-transport properties of chiral antiferromagnet CsCuCl<sub>3</sub>

ORAL

Abstract

Recently, topological effects related to a Berry curvature dipole has been extensively studied in metals without inversion symmetry. On the other hand, these topological effects on charge-neutral bosonic excitations have yet to be clarified. To investigate this issue, we measured the longitudinal and transverse thermal conductivity of the chiral antiferromagnet CsCuCl3, a high-quality homochiral single crystal of which becomes available very recently. We find a large enhancement of the longitudinal thermal conductivity in the ordered phase. This result suggests a large spin thermal conduction that could not be observed clearly in multi-domain crystals. We further find a sizable thermal Hall effect with a non-linear heater dependence even at zero magnetic field. We will discuss a possible origin for this non-linear thermal Hall effect.

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Presenters

  • Masatoshi Akazawa

    • Institute for Solid State Physics, The University of Tokyo
    • ISSP, Univ. of Tokyo

Authors

  • Masatoshi Akazawa

    • Institute for Solid State Physics, The University of Tokyo
    • ISSP, Univ. of Tokyo

  • Masaaki Shimozawa

    • Institute for Solid State Physics, University of Tokyo
    • ISSP, Univ. of Tokyo

  • Minoru Yamashita

    • Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State Physics, The University of Tokyo
    • ISSP, Univ. of Tokyo

  • Yusuke Kousaka

    • Department of Physics and Electronics, Osaka Prefecture University

  • Jun Akimitsu

    • Okayama Univ
    • Okayama University
    • RIIS, Okayama Univ.
    • Research Institute for Interdisciplinary Science, Okayama University

  • Naoto Tsuchiya

    • Department of Chemistry, Hiroshima Univ.

  • Katsuya Inoue

    • Department of Chemistry, Hiroshima Univ.

  • Julien Zaccaro

    • CNRS, Institut NEEL

  • Isabelle Gautier-Luneau

    • CNRS, Institut NEEL

  • Dominique Luneau

    • Universite de Lyon