High-resolution AC Calorimetry Measurement of Honeycomb magnet Na2Co2TeO6

ORAL

Abstract

AC calorimetry is a steady-state measurement technique capable of detecting small heat-capacity signals and variations. Recently, Na2Co2TeO6 is proposed as a candidate material for realizing the Kitaev-Heisenberg model on a honeycomb lattice, and its low-temperature thermal phase behaviors are currently under exploration. Equipped with a home-made AC calorimetry setup, we have measured the heat capacity of Na2Co2TeO6 single crystals with a resolution that is significantly better than commercial equipment. We find an unexpected small heat-capacity peak at low temperature and in zero magnetic field.

*The work is supported by the Beijing Natural Science Foundation (JQ18002) , NSFC (11921005) and the National Key Research and Development Program of China (2017YFA0303301).

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Presenters

  • Zhenhai Hu

    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking Univ

Authors

  • Zhenhai Hu

    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking Univ

  • Yuan Li

    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking University
    • Peking Univ
    • International Cent re for Quantum Materials, School of Physics, Peking University, Beijing, Peking Univ

  • Xi Lin

    • International Center for Quantum Materials, Peking University
    • Peking Univ
    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking University