Field-Direction Sensitive Skyrmion Crystals in Cubic Chiral Systems: Implication to -Electron Compound EuPtSi
arXiv:2106.00113 · doi:10.7566/JPSJ.90.073705
Abstract
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 low-symmetric ordering vectors that lead to the field-direction sensitive SkXs in an external magnetic field, while the other is the synergy between spin-charge and spin-orbit couplings in itinerant magnets that results in the nanometric SkXs. The present study will not only provide the microscopic mechanism of the SkXs in EuPtSi but also guide for a search of further materials hosting short-period SkXs.
5 pages, 5 figures
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- Helicity locking of square skyrmion crystal in a centrosymmetric lattice system without vertical mirror symmetry
- Mechanism of antisymmetric spin polarization in centrosymmetric multiple- magnets based on bilinear and biquadratic spin cross products
- Magnetic field-temperature phase diagrams for multiple- magnetic orderings: Exact steepest descent approach to long-range interacting spin systems
- Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy
- Charge density waves in multiple- spin states
- Competition between helimagnetic and ferroquadrupolar orderings in a monoaxial chiral magnet DyNiGa studied by resonant x-ray diffraction
- Meron-antimeron crystals in noncentrosymmetric itinerant magnets on a triangular lattice