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Kosterlitz-Thouless melting of magnetic order in the triangular quantum Ising material TmMgGaO4

Author

Listed:
  • Han Li

    (Beihang University)

  • Yuan Da Liao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Bin-Bin Chen

    (Beihang University
    Ludwig-Maximilians-Universität München, Fakultät für Physik)

  • Xu-Tao Zeng

    (Beihang University)

  • Xian-Lei Sheng

    (Beihang University)

  • Yang Qi

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Zi Yang Meng

    (Chinese Academy of Sciences
    The University of Hong Kong
    Songshan Lake Materials Laboratory)

  • Wei Li

    (Beihang University
    Beihang University)

Abstract

Frustrated magnets hold the promise of material realizations of exotic phases of quantum matter, but direct comparisons of unbiased model calculations with experimental measurements remain very challenging. Here we design and implement a protocol of employing many-body computation methodologies for accurate model calculations—of both equilibrium and dynamical properties—for a frustrated rare-earth magnet TmMgGaO4 (TMGO), which explains the corresponding experimental findings. Our results confirm TMGO is an ideal realization of triangular-lattice Ising model with an intrinsic transverse field. The magnetic order of TMGO is predicted to melt through two successive Kosterlitz–Thouless (KT) phase transitions, with a floating KT phase in between. The dynamical spectra calculated suggest remnant images of a vanishing magnetic stripe order that represent vortex–antivortex pairs, resembling rotons in a superfluid helium film. TMGO therefore constitutes a rare quantum magnet for realizing KT physics, and we further propose experimental detection of its intriguing properties.

Suggested Citation

  • Han Li & Yuan Da Liao & Bin-Bin Chen & Xu-Tao Zeng & Xian-Lei Sheng & Yang Qi & Zi Yang Meng & Wei Li, 2020. "Kosterlitz-Thouless melting of magnetic order in the triangular quantum Ising material TmMgGaO4," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14907-8
    DOI: 10.1038/s41467-020-14907-8
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    Cited by:

    1. Han Li & Enze Lv & Ning Xi & Yuan Gao & Yang Qi & Wei Li & Gang Su, 2024. "Magnetocaloric effect of topological excitations in Kitaev magnets," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Zheng Yan & Zi Yang Meng, 2023. "Unlocking the general relationship between energy and entanglement spectra via the wormhole effect," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Yuqian Zhao & Zhaohua Ma & Zhangzhen He & Haijun Liao & Yan-Cheng Wang & Junfeng Wang & Yuesheng Li, 2024. "Quantum annealing of a frustrated magnet," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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