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Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs2CuCl4

Author

Listed:
  • S. A. Zvyagin

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • D. Graf

    (Florida State University)

  • T. Sakurai

    (Kobe University)

  • S. Kimura

    (Tohoku University)

  • H. Nojiri

    (Tohoku University)

  • J. Wosnitza

    (Helmholtz-Zentrum Dresden-Rossendorf
    TU Dresden)

  • H. Ohta

    (Kobe University)

  • T. Ono

    (Osaka Prefecture University)

  • H. Tanaka

    (Tokyo Institute of Technology)

Abstract

Quantum triangular-lattice antiferromagnets are important prototype systems to investigate numerous phenomena of the geometrical frustration in condensed matter. Apart from highly unusual magnetic properties, they possess a rich phase diagram (ranging from an unfrustrated square lattice to a quantum spin liquid), yet to be confirmed experimentally. One major obstacle in this area of research is the lack of materials with appropriate (ideally tuned) magnetic parameters. Using Cs2CuCl4 as a model system, we demonstrate an alternative approach, where, instead of the chemical composition, the spin Hamiltonian is altered by hydrostatic pressure. The approach combines high-pressure electron spin resonance and r.f. susceptibility measurements, allowing us not only to quasi-continuously tune the exchange parameters, but also to accurately monitor them. Our experiments indicate a substantial increase of the exchange coupling ratio from 0.3 to 0.42 at a pressure of 1.8 GPa, revealing a number of emergent field-induced phases.

Suggested Citation

  • S. A. Zvyagin & D. Graf & T. Sakurai & S. Kimura & H. Nojiri & J. Wosnitza & H. Ohta & T. Ono & H. Tanaka, 2019. "Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs2CuCl4," Nature Communications, Nature, vol. 10(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09071-7
    DOI: 10.1038/s41467-019-09071-7
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    Cited by:

    1. Kirill Yu. Povarov & David E. Graf & Andreas Hauspurg & Sergei Zherlitsyn & Joachim Wosnitza & Takahiro Sakurai & Hitoshi Ohta & Shojiro Kimura & Hiroyuki Nojiri & V. Ovidiu Garlea & Andrey Zheludev &, 2024. "Pressure-tuned quantum criticality in the large-D antiferromagnet DTN," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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