Field-Direction Sensitive Skyrmion Crystals in Cubic Chiral Systems: Implication to 4f-Electron Compound EuPtSi

@article{Hayami2021FieldDirectionSS,
  title={Field-Direction Sensitive Skyrmion Crystals in Cubic Chiral Systems: Implication to 4f-Electron Compound EuPtSi},
  author={Satoru Hayami and Ryota Yambe},
  journal={Journal of the Physical Society of Japan},
  year={2021}
}
  • S. Hayami, R. Yambe
  • Published 31 May 2021
  • Physics
  • Journal of the Physical Society of Japan
We theoretically study the stability of magnetic skyrmion crystals (SkXs) in chiral cubic antiferromagnets with the EuPtSi hosting unconventional nanometric SkXs in mind. By performing numerical simulations for a minimal effective spin model with the long-range Dzyaloshinskii-Moriya interaction and the multiple-spin interaction arising from itinerant nature of electrons, we clarify two key ingredients for the emergence of the SkXs in EuPtSi: One is the lowsymmetric ordering vectors that lead to… 

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TLDR
Focusing on the interplay between charge and spin degrees of freedom in itinerant electron systems, it is shown that itinerant frustration, which is the competition among electron-mediated interactions, plays a central role in stabilizing a variety of topological spin crystals including a skyrmion crystal with unconventional high skyrnion number, meron crystals, and hedgehog crystals.

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33) the nearest-neighbor DM interaction is twice (≈ 2πa/λ 3) ) as large as the nearest-neighbor ferromagnetic interaction

    The following results remain the same for N = 30 2