Machine learning exploration of topological polarization pattern in hexagonal boron nitride moiré superlattice
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912236030656512 |
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| author | Zheng, Jun-Ding Yao, Cheng-Shi Zhou, Song-Chuan Zhang, Yu-Ke Bao, Zhi-Qiang Tong, Wen-Yi Chu, Jun-Hao Duan, Chun-Gang |
| author_facet | Zheng, Jun-Ding Yao, Cheng-Shi Zhou, Song-Chuan Zhang, Yu-Ke Bao, Zhi-Qiang Tong, Wen-Yi Chu, Jun-Hao Duan, Chun-Gang |
| contents | Twisted moiré supercells, which can be approximated as a combination of sliding bilayers and constitute various topologically nontrivial polarization patterns, attract extensive attention recently. However, because of the excessive size of the moiré supercell, most studies are based on effective models and lack the results of first-principles calculation. In this work, we use machine learning to determine the topological structure of the polarization pattern in twisted and strained bilayer of hexagonal boron nitride (h-BN). We further confirm that the topological pattern can be effectively modulated by the vertical electric field and lattice mismatch. Finally, local polarization also exists in the antiparallel stacked h-BN twisted and strained bilayers. Our work provides a detailed study of the polarization pattern in the moiré superlattice, which we believe can facilitate more research in moiré ferroelectricity, topological physics, and related fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_12698 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Machine learning exploration of topological polarization pattern in hexagonal boron nitride moiré superlattice Zheng, Jun-Ding Yao, Cheng-Shi Zhou, Song-Chuan Zhang, Yu-Ke Bao, Zhi-Qiang Tong, Wen-Yi Chu, Jun-Hao Duan, Chun-Gang Materials Science Twisted moiré supercells, which can be approximated as a combination of sliding bilayers and constitute various topologically nontrivial polarization patterns, attract extensive attention recently. However, because of the excessive size of the moiré supercell, most studies are based on effective models and lack the results of first-principles calculation. In this work, we use machine learning to determine the topological structure of the polarization pattern in twisted and strained bilayer of hexagonal boron nitride (h-BN). We further confirm that the topological pattern can be effectively modulated by the vertical electric field and lattice mismatch. Finally, local polarization also exists in the antiparallel stacked h-BN twisted and strained bilayers. Our work provides a detailed study of the polarization pattern in the moiré superlattice, which we believe can facilitate more research in moiré ferroelectricity, topological physics, and related fields. |
| title | Machine learning exploration of topological polarization pattern in hexagonal boron nitride moiré superlattice |
| topic | Materials Science |
| url | https://arxiv.org/abs/2502.12698 |