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Unveiling new quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2 up to the saturation magnetic field

Author

Listed:
  • T. Nomura

    (University of Tokyo
    Tokyo Denki University)

  • P. Corboz

    (University of Amsterdam)

  • A. Miyata

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • S. Zherlitsyn

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Y. Ishii

    (University of Tokyo)

  • Y. Kohama

    (University of Tokyo)

  • Y. H. Matsuda

    (University of Tokyo)

  • A. Ikeda

    (University of Electro-Communications)

  • C. Zhong

    (Kyoto University
    Ritsumeikan University)

  • H. Kageyama

    (Kyoto University)

  • F. Mila

    (Ecole Polytechnique Fédérale de Lausanne (EPFL))

Abstract

Under magnetic fields, quantum magnets often undergo exotic phase transitions with various kinds of order. The discovery of a sequence of fractional magnetization plateaus in the Shastry-Sutherland compound SrCu2(BO3)2 has played a central role in the high-field research on quantum materials, but so far this system could only be probed up to half the saturation value of the magnetization. Here, we report the first experimental and theoretical investigation of this compound up to the saturation magnetic field of 140 T and beyond. Using ultrasound and magnetostriction techniques combined with extensive tensor-network calculations (iPEPS), several spin-supersolid phases are revealed between the 1/2 plateau and saturation (1/1 plateau). Quite remarkably, the sound velocity of the 1/2 plateau exhibits a drastic decrease of -50%, related to the tetragonal-to-orthorhombic instability of the checkerboard-type magnon crystal. The unveiled nature of this paradigmatic quantum system is a new milestone for exploring exotic quantum states of matter emerging in extreme conditions.

Suggested Citation

  • T. Nomura & P. Corboz & A. Miyata & S. Zherlitsyn & Y. Ishii & Y. Kohama & Y. H. Matsuda & A. Ikeda & C. Zhong & H. Kageyama & F. Mila, 2023. "Unveiling new quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2 up to the saturation magnetic field," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39502-5
    DOI: 10.1038/s41467-023-39502-5
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    References listed on IDEAS

    as
    1. Zhenzhong Shi & Sachith Dissanayake & Philippe Corboz & William Steinhardt & David Graf & D. M. Silevitch & Hanna A. Dabkowska & T. F. Rosenbaum & Frédéric Mila & Sara Haravifard, 2022. "Discovery of quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2 under extreme conditions of field and pressure," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. S. Haravifard & D. Graf & A. E. Feiguin & C. D. Batista & J. C. Lang & D. M. Silevitch & G. Srajer & B. D. Gaulin & H. A. Dabkowska & T. F. Rosenbaum, 2016. "Crystallization of spin superlattices with pressure and field in the layered magnet SrCu2(BO3)2," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
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