Optical Switching of Moiré Chern Ferromagnet
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866908801437794304 |
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| author | Cai, Xiangbin Pan, Haiyang Wang, Yuzhu Rasmita, Abdullah Yang, Shunshun Zhao, Yan Wang, Wei Duan, Ruihuan He, Ruihua Watanabe, Kenji Taniguchi, Takashi Liu, Zheng Pérez, Jesús Zúñiga Yang, Bo Gao, Weibo |
| author_facet | Cai, Xiangbin Pan, Haiyang Wang, Yuzhu Rasmita, Abdullah Yang, Shunshun Zhao, Yan Wang, Wei Duan, Ruihuan He, Ruihua Watanabe, Kenji Taniguchi, Takashi Liu, Zheng Pérez, Jesús Zúñiga Yang, Bo Gao, Weibo |
| contents | Optical manipulation of quantum matter offers a non-contact, high-precision and fast control. Fractional Chern ferromagnet states in moiré superlattices are promising for topological quantum computing, but an effective optical control protocol has remained elusive. Here, we demonstrate robust optical switching of integer and fractional Chern ferromagnets in twisted MoTe2 bilayers using circularly polarized light. Highly efficient optical manipulation of spin orientations in the topological ferromagnet regime is realized at zero field using a pump light power as low as 28 nanowatts per square micrometer. Utilizing this optically induced transition, we also demonstrate magnetic bistate cycling and spatially resolved writing of ferromagnetic domain walls. This work establishes a reliable and efficient optical control scheme for moiré Chern ferromagnets, paving the way for dissipationless spintronics and quantized Chern junction devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_19602 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optical Switching of Moiré Chern Ferromagnet Cai, Xiangbin Pan, Haiyang Wang, Yuzhu Rasmita, Abdullah Yang, Shunshun Zhao, Yan Wang, Wei Duan, Ruihuan He, Ruihua Watanabe, Kenji Taniguchi, Takashi Liu, Zheng Pérez, Jesús Zúñiga Yang, Bo Gao, Weibo Mesoscale and Nanoscale Physics Materials Science Optical manipulation of quantum matter offers a non-contact, high-precision and fast control. Fractional Chern ferromagnet states in moiré superlattices are promising for topological quantum computing, but an effective optical control protocol has remained elusive. Here, we demonstrate robust optical switching of integer and fractional Chern ferromagnets in twisted MoTe2 bilayers using circularly polarized light. Highly efficient optical manipulation of spin orientations in the topological ferromagnet regime is realized at zero field using a pump light power as low as 28 nanowatts per square micrometer. Utilizing this optically induced transition, we also demonstrate magnetic bistate cycling and spatially resolved writing of ferromagnetic domain walls. This work establishes a reliable and efficient optical control scheme for moiré Chern ferromagnets, paving the way for dissipationless spintronics and quantized Chern junction devices. |
| title | Optical Switching of Moiré Chern Ferromagnet |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2508.19602 |