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Electrical magnetochiral effect induced by chiral spin fluctuations

Author

Listed:
  • T. Yokouchi

    (The University of Tokyo)

  • N. Kanazawa

    (The University of Tokyo)

  • A. Kikkawa

    (RIKEN Center for Emergent Matter Science (CEMS))

  • D. Morikawa

    (RIKEN Center for Emergent Matter Science (CEMS))

  • K. Shibata

    (RIKEN Center for Emergent Matter Science (CEMS))

  • T. Arima

    (RIKEN Center for Emergent Matter Science (CEMS)
    The University of Tokyo)

  • Y. Taguchi

    (RIKEN Center for Emergent Matter Science (CEMS))

  • F. Kagawa

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Y. Tokura

    (The University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

Abstract

Chirality of matter can produce unique responses in optics, electricity and magnetism. In particular, magnetic crystals transmit their handedness to the magnetism via antisymmetric exchange interaction of relativistic origin, producing helical spin orders as well as their fluctuations. Here we report for a chiral magnet MnSi that chiral spin fluctuations manifest themselves in the electrical magnetochiral effect, i.e. the nonreciprocal and nonlinear response characterized by the electrical resistance depending on inner product of current and magnetic field. Prominent electrical magnetochiral signals emerge at specific temperature-magnetic field-pressure regions: in the paramagnetic phase just above the helical ordering temperature and in the partially-ordered topological spin state at low temperatures and high pressures, where thermal and quantum spin fluctuations are conspicuous in proximity of classical and quantum phase transitions, respectively. The finding of the asymmetric electron scattering by chiral spin fluctuations may explore new electromagnetic functionality in chiral magnets.

Suggested Citation

  • T. Yokouchi & N. Kanazawa & A. Kikkawa & D. Morikawa & K. Shibata & T. Arima & Y. Taguchi & F. Kagawa & Y. Tokura, 2017. "Electrical magnetochiral effect induced by chiral spin fluctuations," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01094-2
    DOI: 10.1038/s41467-017-01094-2
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    Cited by:

    1. Geert L. J. A. Rikken & Narcis Avarvari, 2022. "Dielectric magnetochiral anisotropy," Nature Communications, Nature, vol. 13(1), pages 1-5, December.
    2. Hidetoshi Masuda & Takeshi Seki & Jun-ichiro Ohe & Yoichi Nii & Hiroto Masuda & Koki Takanashi & Yoshinori Onose, 2024. "Room temperature chirality switching and detection in a helimagnetic MnAu2 thin film," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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