Super-Moiré Spin Textures in Twisted Antiferromagnets
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915585463418880 |
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| author | Wong, King Cho Peng, Ruoming Anderson, Eric Ross, Jackson Yang, Bowen Cheng, Meixin Jayaram, Sreehari Lenger, Malik Zhou, Xuankai Kong, Yan Tung Taniguchi, Takashi Watanabe, Kenji McGuire, Michael A. Stöhr, Rainer Tsen, Adam Wei Santos, Elton J. G. Xu, Xiaodong Wrachtrup, Jörg |
| author_facet | Wong, King Cho Peng, Ruoming Anderson, Eric Ross, Jackson Yang, Bowen Cheng, Meixin Jayaram, Sreehari Lenger, Malik Zhou, Xuankai Kong, Yan Tung Taniguchi, Takashi Watanabe, Kenji McGuire, Michael A. Stöhr, Rainer Tsen, Adam Wei Santos, Elton J. G. Xu, Xiaodong Wrachtrup, Jörg |
| contents | Stacking two-dimensional (2D) layered materials offers a powerful platform to engineer electronic and magnetic states. In general, the resulting states, such as Moiré magnetism, have a periodicity at the length scale of the Moiré unit cell. Here, we report a new type of magnetism -- dubbed a super-Moiré magnetic state -- which is characterized by long-range magnetic textures extending beyond the single Moiré unit cell -- in twisted double bilayer chromium triiodide (tDB CrI$_3$). We found that at small twist angles, the size of the spontaneous magnetic texture increases with twist angle, opposite to the underlying Moiré periodicity. The spin-texture size reaches a maximum of about 300 nm in 1.1$°$ twisted devices, an order of magnitude larger than the underlying Moiré wavelength, and vanishes at twist angles above 2$°$. Employing scanning quantum spin magnetometry, the obtained vector field maps suggest the formation of antiferromagnetic Néel-type skyrmions spanning multiple Moiré cells. The twist-angle-dependent study combined with large-scale atomistic simulations suggests that complex magnetic competition between the Dzyaloshinskii--Moriya interaction, magnetic anisotropy, and exchange interactions controlled by the relative rotation of the layers produces the topological textures which arise in the super-Moiré spin orders. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_25545 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Super-Moiré Spin Textures in Twisted Antiferromagnets Wong, King Cho Peng, Ruoming Anderson, Eric Ross, Jackson Yang, Bowen Cheng, Meixin Jayaram, Sreehari Lenger, Malik Zhou, Xuankai Kong, Yan Tung Taniguchi, Takashi Watanabe, Kenji McGuire, Michael A. Stöhr, Rainer Tsen, Adam Wei Santos, Elton J. G. Xu, Xiaodong Wrachtrup, Jörg Quantum Physics Stacking two-dimensional (2D) layered materials offers a powerful platform to engineer electronic and magnetic states. In general, the resulting states, such as Moiré magnetism, have a periodicity at the length scale of the Moiré unit cell. Here, we report a new type of magnetism -- dubbed a super-Moiré magnetic state -- which is characterized by long-range magnetic textures extending beyond the single Moiré unit cell -- in twisted double bilayer chromium triiodide (tDB CrI$_3$). We found that at small twist angles, the size of the spontaneous magnetic texture increases with twist angle, opposite to the underlying Moiré periodicity. The spin-texture size reaches a maximum of about 300 nm in 1.1$°$ twisted devices, an order of magnitude larger than the underlying Moiré wavelength, and vanishes at twist angles above 2$°$. Employing scanning quantum spin magnetometry, the obtained vector field maps suggest the formation of antiferromagnetic Néel-type skyrmions spanning multiple Moiré cells. The twist-angle-dependent study combined with large-scale atomistic simulations suggests that complex magnetic competition between the Dzyaloshinskii--Moriya interaction, magnetic anisotropy, and exchange interactions controlled by the relative rotation of the layers produces the topological textures which arise in the super-Moiré spin orders. |
| title | Super-Moiré Spin Textures in Twisted Antiferromagnets |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.25545 |