Facilitating field-free perpendicular magnetization switching with a Berry curvature dipole in a Weyl semimetal
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| _version_ | 1866915046985039872 |
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| author | Li, Dong Liu, Xing-Yu Ye, Xing-Guo Pan, Zhen-Cun Xu, Wen-Zheng Zhu, Peng-Fei Wang, An-Qi Watanabe, Kenji Taniguchi, Takashi Liao, Zhi-Min |
| author_facet | Li, Dong Liu, Xing-Yu Ye, Xing-Guo Pan, Zhen-Cun Xu, Wen-Zheng Zhu, Peng-Fei Wang, An-Qi Watanabe, Kenji Taniguchi, Takashi Liao, Zhi-Min |
| contents | We report the synergy between orbital and spin-orbit torques in WTe2/Fe3GeTe2 heterostructures characterized by a Berry curvature dipole. By applying a current along the a axis in WTe2, we detect an out-of-plane magnetization in the system, which we attribute to nonequilibrium orbital magnetization linked to the Berry curvature dipole based on first-principles calculations, manifesting as the orbital Edelstein effect. This effect generates orbital torques that enable field-free perpendicular magnetization switching. Furthermore, by applying a relatively small current along the a axis and a pulsed current along the b axis in WTe2, we demonstrate controllable field-free magnetization switching of the adjacent Fe3GeTe2 layer, independently manipulating the orbital and spin-orbit torques. Our findings not only enhance the understanding of the collaborative dynamics between these torques but also suggest potential applications in magnetoresistive random-access memory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_02491 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Facilitating field-free perpendicular magnetization switching with a Berry curvature dipole in a Weyl semimetal Li, Dong Liu, Xing-Yu Ye, Xing-Guo Pan, Zhen-Cun Xu, Wen-Zheng Zhu, Peng-Fei Wang, An-Qi Watanabe, Kenji Taniguchi, Takashi Liao, Zhi-Min Mesoscale and Nanoscale Physics Materials Science We report the synergy between orbital and spin-orbit torques in WTe2/Fe3GeTe2 heterostructures characterized by a Berry curvature dipole. By applying a current along the a axis in WTe2, we detect an out-of-plane magnetization in the system, which we attribute to nonequilibrium orbital magnetization linked to the Berry curvature dipole based on first-principles calculations, manifesting as the orbital Edelstein effect. This effect generates orbital torques that enable field-free perpendicular magnetization switching. Furthermore, by applying a relatively small current along the a axis and a pulsed current along the b axis in WTe2, we demonstrate controllable field-free magnetization switching of the adjacent Fe3GeTe2 layer, independently manipulating the orbital and spin-orbit torques. Our findings not only enhance the understanding of the collaborative dynamics between these torques but also suggest potential applications in magnetoresistive random-access memory. |
| title | Facilitating field-free perpendicular magnetization switching with a Berry curvature dipole in a Weyl semimetal |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2412.02491 |