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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2505.17742 |
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| _version_ | 1866918032046030848 |
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| author | Lun, Yingzhuo Hu, Xinxin Ren, Qi Saeed, Umair Gupta, Kapil Mundet, Bernat Pinto-Huguet, Ivan Santiso, Jose Padilla-Pantoja, Jessica Roque, Jose Manuel Caicedo Ma, Yunpeng Li, Qian Tang, Gang Pesquera, David Wang, Xueyun Hong, Jiawang Arbiol, Jordi Catalan, Gustau |
| author_facet | Lun, Yingzhuo Hu, Xinxin Ren, Qi Saeed, Umair Gupta, Kapil Mundet, Bernat Pinto-Huguet, Ivan Santiso, Jose Padilla-Pantoja, Jessica Roque, Jose Manuel Caicedo Ma, Yunpeng Li, Qian Tang, Gang Pesquera, David Wang, Xueyun Hong, Jiawang Arbiol, Jordi Catalan, Gustau |
| contents | Recent advances in moire engineering provide new pathways for manipulating lattice distortions and electronic properties in low-dimensional materials. Here, we demonstrate that twisted stacking can induce dipolar vortices in metallic SrRuO3 membranes, despite the presence of free charges that would normally screen depolarizing fields and dipole-dipole interactions. These polarization vortices are correlated with moire-periodic flexoelectricity induced by shear strain gradients, and exhibit a pronounced dependence on the twist angle. In addition, multiferroic behavior emerges below the ferromagnetic Curie temperature of the films, whereby polarization and ferromagnetism coexist and compete, showing opposite twist-angle dependencies of their respective magnitudes. Density functional theory calculations provide insights into the microscopic origin of these observations. Our findings extend the scope of polarization topology design beyond dielectric materials and into metals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_17742 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Polarization Vortices in a Ferromagnetic Metal via Twistronics Lun, Yingzhuo Hu, Xinxin Ren, Qi Saeed, Umair Gupta, Kapil Mundet, Bernat Pinto-Huguet, Ivan Santiso, Jose Padilla-Pantoja, Jessica Roque, Jose Manuel Caicedo Ma, Yunpeng Li, Qian Tang, Gang Pesquera, David Wang, Xueyun Hong, Jiawang Arbiol, Jordi Catalan, Gustau Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Recent advances in moire engineering provide new pathways for manipulating lattice distortions and electronic properties in low-dimensional materials. Here, we demonstrate that twisted stacking can induce dipolar vortices in metallic SrRuO3 membranes, despite the presence of free charges that would normally screen depolarizing fields and dipole-dipole interactions. These polarization vortices are correlated with moire-periodic flexoelectricity induced by shear strain gradients, and exhibit a pronounced dependence on the twist angle. In addition, multiferroic behavior emerges below the ferromagnetic Curie temperature of the films, whereby polarization and ferromagnetism coexist and compete, showing opposite twist-angle dependencies of their respective magnitudes. Density functional theory calculations provide insights into the microscopic origin of these observations. Our findings extend the scope of polarization topology design beyond dielectric materials and into metals. |
| title | Polarization Vortices in a Ferromagnetic Metal via Twistronics |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.17742 |