LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons
Abstract Two-dimensional (2D) van der Waals (vdW) materials provide the versatile playground to stack two or more vdW layers for creation of superior materials with desired properties. Here we theoretically adopt a twisted stack-engineering of two LaBr2 monolayers to break space inversion symmetry f...
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| Format: | Article |
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Nature Portfolio
2022-07-01
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| Series: | npj Computational Materials |
| Online Access: | https://doi.org/10.1038/s41524-022-00833-4 |
| _version_ | 1817969581116882944 |
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| author | Wei Sun Wenxuan Wang Hang Li Xiaoning Li Zheyin Yu Ying Bai Guangbiao Zhang Zhenxiang Cheng |
| author_facet | Wei Sun Wenxuan Wang Hang Li Xiaoning Li Zheyin Yu Ying Bai Guangbiao Zhang Zhenxiang Cheng |
| author_sort | Wei Sun |
| collection | DOAJ |
| description | Abstract Two-dimensional (2D) van der Waals (vdW) materials provide the versatile playground to stack two or more vdW layers for creation of superior materials with desired properties. Here we theoretically adopt a twisted stack-engineering of two LaBr2 monolayers to break space inversion symmetry for ferroelectricity and ultimately multiferroism. The enhancement and reversal of electric polarization are accompanied with the transition from interlayer ferromagnetic and antiferromagnetic orderings, demonstrating an effective magnetoelectric coupling effect with a mechanism dissimilar to that of the conventional multiferroics. Magnetization dynamics simulations show that such magnetic phase transition can excite topologically protected bimeron, and the skyrmion Hall effect can be suppressed by bilayer-bimeron stabilized in both ferromagnetic and antiferromagnetic configurations. Moreover, in the small-angle twisted moiré superlattice, the uniform polarization will evolve into a staggered domain structure, accompanied with the appearance of bimeron, which forms a significant discrepancy with the non-twisted stack-engineered multiferroic LaBr2 bilayer. This work provides a strategy for 2D multiferroic materials by twisted stack engineering of magnetic single layers. |
| first_indexed | 2024-04-13T20:23:04Z |
| format | Article |
| id | doaj.art-7afdc26dda0e44ba92941a3ce3953cd7 |
| institution | Directory Open Access Journal |
| issn | 2057-3960 |
| language | English |
| last_indexed | 2024-04-13T20:23:04Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Computational Materials |
| spelling | doaj.art-7afdc26dda0e44ba92941a3ce3953cd72022-12-22T02:31:28ZengNature Portfolionpj Computational Materials2057-39602022-07-01811910.1038/s41524-022-00833-4LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimeronsWei Sun0Wenxuan Wang1Hang Li2Xiaoning Li3Zheyin Yu4Ying Bai5Guangbiao Zhang6Zhenxiang Cheng7International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan UniversityInternational Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan UniversityInternational Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan UniversityInstitute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires WayInstitute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires WayInternational Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan UniversityInternational Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan UniversityInstitute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires WayAbstract Two-dimensional (2D) van der Waals (vdW) materials provide the versatile playground to stack two or more vdW layers for creation of superior materials with desired properties. Here we theoretically adopt a twisted stack-engineering of two LaBr2 monolayers to break space inversion symmetry for ferroelectricity and ultimately multiferroism. The enhancement and reversal of electric polarization are accompanied with the transition from interlayer ferromagnetic and antiferromagnetic orderings, demonstrating an effective magnetoelectric coupling effect with a mechanism dissimilar to that of the conventional multiferroics. Magnetization dynamics simulations show that such magnetic phase transition can excite topologically protected bimeron, and the skyrmion Hall effect can be suppressed by bilayer-bimeron stabilized in both ferromagnetic and antiferromagnetic configurations. Moreover, in the small-angle twisted moiré superlattice, the uniform polarization will evolve into a staggered domain structure, accompanied with the appearance of bimeron, which forms a significant discrepancy with the non-twisted stack-engineered multiferroic LaBr2 bilayer. This work provides a strategy for 2D multiferroic materials by twisted stack engineering of magnetic single layers.https://doi.org/10.1038/s41524-022-00833-4 |
| spellingShingle | Wei Sun Wenxuan Wang Hang Li Xiaoning Li Zheyin Yu Ying Bai Guangbiao Zhang Zhenxiang Cheng LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons npj Computational Materials |
| title | LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons |
| title_full | LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons |
| title_fullStr | LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons |
| title_full_unstemmed | LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons |
| title_short | LaBr2 bilayer multiferroic moiré superlattice with robust magnetoelectric coupling and magnetic bimerons |
| title_sort | labr2 bilayer multiferroic moire superlattice with robust magnetoelectric coupling and magnetic bimerons |
| url | https://doi.org/10.1038/s41524-022-00833-4 |
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