Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets
arXiv:2111.03202 · doi:10.1088/1367-2630/ac3683
Abstract
Interplay between itinerant electrons and localized spins in itinerant magnets gives rise to a variety of noncoplanar multiple- spin textures, such as the skyrmion, hedgehog, meron, and vortex. We elucidate that another type of multiple- state consisting of collinear sinusoidal waves, a magnetic bubble crystal, appears at finite temperatures in a centrosymmetric itinerant electron system. The results are obtained for the classical Kondo lattice model with easy-axis single-ion anisotropy on a triangular lattice by a large-scale numerical simulation. We find that a finite-temperature topological phase transition between the skyrmion crystal and the bubble crystal occurs by changing the temperature. We obtain the minimal key ingredients for inducing the finite-temperature transition by analyzing an effective spin model where it is shown that the synergy between the multiple-spin interaction and magnetic anisotropy plays a significant role.
arXiv comment15 pages, 4 figures. To appear in New Journal of Physics
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