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Theory of antiskyrmions in magnets

Author

Listed:
  • Wataru Koshibae

    (RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)

  • Naoto Nagaosa

    (RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
    University of Tokyo)

Abstract

Skyrmions and antiskyrmions are swirling topological magnetic textures realized as emergent particles in magnets. A skyrmion is stabilized by the Dzyaloshinskii–Moriya interaction in chiral magnets and/or a dipolar interaction in thin film magnets, which prefer the twist of the magnetic moments. Here we show by a numerical simulation of the Landau–Lifshitz–Gilbert equation that pairs of skyrmions and antiskyrmions are created from the helix state as the magnetic field is increased. Antiskyrmions are unstable and disappear immediately in chiral magnets, whereas they are metastable and survive in dipolar magnets. The collision between a skyrmion and an antiskyrmion in a dipolar magnet is also studied. It is found that the collision depends on their relative direction, and the pair annihilation occurs in some cases and only the antiskyrmion is destroyed in the other cases. These results indicate that the antiskyrmion offers a unique opportunity to study particles and antiparticles in condensed-matter systems.

Suggested Citation

  • Wataru Koshibae & Naoto Nagaosa, 2016. "Theory of antiskyrmions in magnets," Nature Communications, Nature, vol. 7(1), pages 1-8, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10542
    DOI: 10.1038/ncomms10542
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    Cited by:

    1. Yao Guang & Xichao Zhang & Yizhou Liu & Licong Peng & Fehmi Sami Yasin & Kosuke Karube & Daisuke Nakamura & Naoto Nagaosa & Yasujiro Taguchi & Masahito Mochizuki & Yoshinori Tokura & Xiuzhen Yu, 2024. "Confined antiskyrmion motion driven by electric current excitations," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Jidan Yang & Yu Zou & Wentao Tang & Jinxing Li & Mingjun Huang & Satoshi Aya, 2022. "Spontaneous electric-polarization topology in confined ferroelectric nematics," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    3. Frederic Rendell-Bhatti & Raymond J. Lamb & Johannes W. Jagt & Gary W. Paterson & Henk J. M. Swagten & Damien McGrouther, 2020. "Spontaneous creation and annihilation dynamics and strain-limited stability of magnetic skyrmions," Nature Communications, Nature, vol. 11(1), pages 1-9, December.

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