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Kinetic magnetism in triangular moiré materials

Author

Listed:
  • L. Ciorciaro

    (ETH Zürich)

  • T. Smoleński

    (ETH Zürich)

  • I. Morera

    (Universitat de Barcelona
    Universitat de Barcelona)

  • N. Kiper

    (ETH Zürich)

  • S. Hiestand

    (ETH Zürich)

  • M. Kroner

    (ETH Zürich)

  • Y. Zhang

    (University of Tennessee
    University of Tennessee)

  • K. Watanabe

    (National Institute for Materials Science)

  • T. Taniguchi

    (National Institute for Materials Science)

  • E. Demler

    (ETH Zürich)

  • A. İmamoğlu

    (ETH Zürich)

Abstract

Magnetic properties of materials ranging from conventional ferromagnetic metals to strongly correlated materials such as cuprates originate from Coulomb exchange interactions. The existence of alternate mechanisms for magnetism that could naturally facilitate electrical control has been discussed theoretically1–7, but an experimental demonstration8 in an extended system has been missing. Here we investigate MoSe2/WS2 van der Waals heterostructures in the vicinity of Mott insulator states of electrons forming a frustrated triangular lattice and observe direct evidence of magnetic correlations originating from a kinetic mechanism. By directly measuring electronic magnetization through the strength of the polarization-selective attractive polaron resonance9,10, we find that when the Mott state is electron-doped, the system exhibits ferromagnetic correlations in agreement with the Nagaoka mechanism.

Suggested Citation

  • L. Ciorciaro & T. Smoleński & I. Morera & N. Kiper & S. Hiestand & M. Kroner & Y. Zhang & K. Watanabe & T. Taniguchi & E. Demler & A. İmamoğlu, 2023. "Kinetic magnetism in triangular moiré materials," Nature, Nature, vol. 623(7987), pages 509-513, November.
    • Handle: RePEc:nat:nature:v:623:y:2023:i:7987:d:10.1038_s41586-023-06633-0
    DOI: 10.1038/s41586-023-06633-0
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    Cited by:

    1. Richen Xiong & Samuel L. Brantly & Kaixiang Su & Jacob H. Nie & Zihan Zhang & Rounak Banerjee & Hayley Ruddick & Kenji Watanabe & Takashi Taniguchi & Seth Ariel Tongay & Cenke Xu & Chenhao Jin, 2024. "Tunable exciton valley-pseudospin orders in moiré superlattices," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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