open access

https://hdl.handle.net/2115/100244

Skyrmion generation via Laguerre-Gaussian beam irradiation in frustrated magnets

英語

2026-07-13

American Physical Society

Physical Review B

114(1)

Since their discovery, the study of magnetic skyrmions has been on the rise. In this paper, we discuss our investigations on the light-induced mechanisms for skyrmion generation in a centrosymmetric triangular magnetic lattice with competing J1-J3 interactions, and easy-axis anisotropy. We solve the stochastic LandauLifshitz-Gilbert equation for the lattice spin dynamics under Laguerre-Gaussian beam irradiation. Numerical results show that skyrmions are nucleated in two thermodynamic regions, each favoring different phases: the ferromagnetic phase and the skyrmion-lattice phase. In the ferromagnetic region, isolated skyrmions are generated mainly through stochastic thermal nucleation. In this regime, higher temperatures and larger beam widths are required to overcome the nucleation barrier. In contrast, in the skyrmion-lattice region, skyrmion nucleation occurs via thermal annealing, where the system relaxes toward its true ground state. These findings establish a comprehensive theoretical framework for optimizing optical control to generate light-induced skyrmionic textures in frustrated magnets.

学術雑誌論文

Accepted Manuscript

©2026 American Physical Society

2469-9950

2469-9969