Rich Phase Behaviors in Kitaev Honeycomb Magnet Na<sub>2</sub>Co<sub>2</sub>TeO<sub>6</sub>

ORAL

Abstract

Quantum spin liquids based on the exactly solvable Kitaev honeycomb model have attracted considerable interest. In real materials, the realization of Kitaev interactions requires particular combinations of crystal-field environment, spin-orbit coupling, and exchange interactions. A recently proposed honeycomb magnet, Na2Co2TeO6, provided a promising opportunity for realizing the Kitaev model. After performing a combination of spectroscopic and thermodynamic measurements on single crystals of this material, we found that Na2Co2TeO6, surprisingly, goes through several distinct phase transitions at low temperatures and in zero magnetic field. We attribute the complex phase behaviors to the complexity of the underlying interactions. Understanding these newly discovered magnetic phases is likely a prerequisite before the system can be tuned towards quantum spin liquids.

*Funding Sources: National Natural Science Foundation of China

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Presenters

  • Wenjie Chen

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

Authors

  • Wenjie Chen

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

  • Xintong Li

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

  • Zhenhai Hu

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

  • Li Yue

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

  • Ronny Sutarto

    • Canadian Light Source
    • Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

  • Feizhou He

    • Canadian Light Source
    • Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

  • Kazuki Iida

    • Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS)

  • Kazuya Kamazawa

    • Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS)

  • Xi Lin

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

  • 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