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- W4381712772 abstract "Complex spin textures in itinerant electron magnets hold promises for next-generation memory and information technology. The long-ranged and often frustrated electron-mediated spin interactions in these materials give rise to intriguing localized spin structures such as skyrmions. Yet, simulations of magnetization dynamics for such itinerant magnets are computationally difficult due to the need for repeated solutions to the electronic structure problems. We present a convolutional neural network (CNN) model to accurately and efficiently predict the electron-induced magnetic torques acting on local spins. Importantly, as the convolutional operations with a fixed kernel (receptive field) size naturally take advantage of the locality principle for many-electron systems, CNN offers a scalable machine learning approach to spin dynamics. We apply our approach to enable large-scale dynamical simulations of skyrmion phases in itinerant spin systems. By incorporating the CNN model into Landau-Lifshitz-Gilbert dynamics, our simulations successfully reproduce the relaxation process of the skyrmion phase and stabilize a skyrmion lattice in larger systems. The CNN model also allows us to compute the effective receptive fields, thus providing a systematic and unbiased method for determining the locality of the original electron models." @default.
- W4381712772 created "2023-06-24" @default.
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- W4381712772 date "2023-06-20" @default.
- W4381712772 modified "2023-09-25" @default.
- W4381712772 title "Convolutional neural networks for large-scale dynamical modeling of itinerant magnets" @default.
- W4381712772 doi "https://doi.org/10.48550/arxiv.2306.11833" @default.
- W4381712772 hasPublicationYear "2023" @default.
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