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Thermal Hall conductivity in the cuprate Mott insulators Nd2CuO4 and Sr2CuO2Cl2

Author

Listed:
  • Marie-Eve Boulanger

    (Université de Sherbrooke)

  • Gaël Grissonnanche

    (Université de Sherbrooke)

  • Sven Badoux

    (Université de Sherbrooke)

  • Andréanne Allaire

    (Université de Sherbrooke)

  • Étienne Lefrançois

    (Université de Sherbrooke)

  • Anaëlle Legros

    (Université de Sherbrooke
    SPEC, CEA, CNRS-UMR3680, Université Paris-Saclay)

  • Adrien Gourgout

    (Université de Sherbrooke)

  • Maxime Dion

    (Université de Sherbrooke)

  • C. H. Wang

    (University of Science and Technology of China)

  • X. H. Chen

    (University of Science and Technology of China)

  • R. Liang

    (University of British Columbia)

  • W. N. Hardy

    (University of British Columbia)

  • D. A. Bonn

    (University of British Columbia)

  • Louis Taillefer

    (Université de Sherbrooke
    Canadian Institute for Advanced Research)

Abstract

The heat carriers responsible for the unexpectedly large thermal Hall conductivity of the cuprate Mott insulator La2CuO4 were recently shown to be phonons. However, the mechanism by which phonons in cuprates acquire chirality in a magnetic field is still unknown. Here, we report a similar thermal Hall conductivity in two cuprate Mott insulators with significantly different crystal structures and magnetic orders – Nd2CuO4 and Sr2CuO2Cl2 – and show that two potential mechanisms can be excluded – the scattering of phonons by rare-earth impurities and by structural domains. Our comparative study further reveals that orthorhombicity, apical oxygens, the tilting of oxygen octahedra and the canting of spins out of the CuO2 planes are not essential to the mechanism of chirality. Our findings point to a chiral mechanism coming from a coupling of acoustic phonons to the intrinsic excitations of the CuO2 planes.

Suggested Citation

  • Marie-Eve Boulanger & Gaël Grissonnanche & Sven Badoux & Andréanne Allaire & Étienne Lefrançois & Anaëlle Legros & Adrien Gourgout & Maxime Dion & C. H. Wang & X. H. Chen & R. Liang & W. N. Hardy & D., 2020. "Thermal Hall conductivity in the cuprate Mott insulators Nd2CuO4 and Sr2CuO2Cl2," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18881-z
    DOI: 10.1038/s41467-020-18881-z
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    Cited by:

    1. Lu Chen & Étienne Lefrançois & Ashvini Vallipuram & Quentin Barthélemy & Amirreza Ataei & Weiliang Yao & Yuan Li & Louis Taillefer, 2024. "Planar thermal Hall effect from phonons in a Kitaev candidate material," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. Taiki Uehara & Takumi Ohtsuki & Masafumi Udagawa & Satoru Nakatsuji & Yo Machida, 2022. "Phonon thermal Hall effect in a metallic spin ice," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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