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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2204.03837 |
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| _version_ | 1866911974825132032 |
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| author | Cheng, Guanghui Rahman, Mohammad Mushfiqur Allcca, Andres Llacsahuanga Rustagi, Avinash Liu, Xingtao Liu, Lina Fu, Lei Zhu, Yanglin Mao, Zhiqiang Watanabe, Kenji Taniguchi, Takashi Upadhyaya, Pramey Chen, Yong P. |
| author_facet | Cheng, Guanghui Rahman, Mohammad Mushfiqur Allcca, Andres Llacsahuanga Rustagi, Avinash Liu, Xingtao Liu, Lina Fu, Lei Zhu, Yanglin Mao, Zhiqiang Watanabe, Kenji Taniguchi, Takashi Upadhyaya, Pramey Chen, Yong P. |
| contents | Moiré superlattices in van der Waals structures can be used to control the electronic properties of the material and lead to emergent correlated and topological phenomena. Its first demonstration in van der Waals magnets exhibited noncollinear states and domain structures with, however, limited manipulation. Here we report electrically tunable moiré magnetism in twisted double bilayers - that is, a bilayer plus a bilayer with a twist angle between them - of layered antiferromagnet CrI3. Using magneto-optical Kerr effect microscopy, we observe the coexistence of antiferromagnetic and ferromagnetic order with nonzero net magnetization - a hallmark of moiré magnetism. Such magnetic state extends over a wide range of twist angles (with transitions at around 0° and above 20°) and exhibits a nonmonotonic temperature dependence. We further demonstrate voltage-assisted magnetic switching. The observed nontrivial magnetic states and unprecedented control by twist angle, temperature and electrical gating are supported by the simulated phase diagram of the moiré magnetism. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2204_03837 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Electrically tunable moiré magnetism in twisted double bilayers of chromium triiodide Cheng, Guanghui Rahman, Mohammad Mushfiqur Allcca, Andres Llacsahuanga Rustagi, Avinash Liu, Xingtao Liu, Lina Fu, Lei Zhu, Yanglin Mao, Zhiqiang Watanabe, Kenji Taniguchi, Takashi Upadhyaya, Pramey Chen, Yong P. Materials Science Moiré superlattices in van der Waals structures can be used to control the electronic properties of the material and lead to emergent correlated and topological phenomena. Its first demonstration in van der Waals magnets exhibited noncollinear states and domain structures with, however, limited manipulation. Here we report electrically tunable moiré magnetism in twisted double bilayers - that is, a bilayer plus a bilayer with a twist angle between them - of layered antiferromagnet CrI3. Using magneto-optical Kerr effect microscopy, we observe the coexistence of antiferromagnetic and ferromagnetic order with nonzero net magnetization - a hallmark of moiré magnetism. Such magnetic state extends over a wide range of twist angles (with transitions at around 0° and above 20°) and exhibits a nonmonotonic temperature dependence. We further demonstrate voltage-assisted magnetic switching. The observed nontrivial magnetic states and unprecedented control by twist angle, temperature and electrical gating are supported by the simulated phase diagram of the moiré magnetism. |
| title | Electrically tunable moiré magnetism in twisted double bilayers of chromium triiodide |
| topic | Materials Science |
| url | https://arxiv.org/abs/2204.03837 |