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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/2502.20675 |
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| _version_ | 1866929735334887424 |
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| author | Li, Si-yu Wang, Zhongrui Han, Yingzhuo Xu, Shaoqing Xu, Zhiyue Wang, Yingbo Wang, Zhengwen Xue, Yucheng Song, Aisheng Watanabe, Kenji Taniguchi, Takashi Wang, Xueyun Ma, Tian-Bao Hong, Jiawang Gao, Hong-Jun Jiang, Yuhang Mao, Jinhai |
| author_facet | Li, Si-yu Wang, Zhongrui Han, Yingzhuo Xu, Shaoqing Xu, Zhiyue Wang, Yingbo Wang, Zhengwen Xue, Yucheng Song, Aisheng Watanabe, Kenji Taniguchi, Takashi Wang, Xueyun Ma, Tian-Bao Hong, Jiawang Gao, Hong-Jun Jiang, Yuhang Mao, Jinhai |
| contents | Nanoscale polar structures are significant for understanding polarization processes in low-dimensional systems and hold potential for developing high-performance electronics. Here, we demonstrate a polar vortex superstructure arising from the reconstructed moiré patterns in twisted bilayer graphene aligned with hexagonal boron nitride. Scanning tunneling microscopy reveals spatially modulated charge polarization, while theoretical simulations indicate that the in-plane polarization field forms an array of polar vortices. Notably, this polar field is gate-tunable, exhibiting an unconventional gate-tunable polar sliding and screening process. Moreover, its interaction with electron correlations in twisted bilayer graphene leads to modulated correlated states. Our findings establish moiré pattern reconstruction as a powerful strategy for engineering nanoscale polar structures and emergent quantum phases in van der Waals materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_20675 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Polar Vortex Superstructure and Its Coupling with Correlated Electrons in Quasiperiodic Moire Crystal Li, Si-yu Wang, Zhongrui Han, Yingzhuo Xu, Shaoqing Xu, Zhiyue Wang, Yingbo Wang, Zhengwen Xue, Yucheng Song, Aisheng Watanabe, Kenji Taniguchi, Takashi Wang, Xueyun Ma, Tian-Bao Hong, Jiawang Gao, Hong-Jun Jiang, Yuhang Mao, Jinhai Mesoscale and Nanoscale Physics Nanoscale polar structures are significant for understanding polarization processes in low-dimensional systems and hold potential for developing high-performance electronics. Here, we demonstrate a polar vortex superstructure arising from the reconstructed moiré patterns in twisted bilayer graphene aligned with hexagonal boron nitride. Scanning tunneling microscopy reveals spatially modulated charge polarization, while theoretical simulations indicate that the in-plane polarization field forms an array of polar vortices. Notably, this polar field is gate-tunable, exhibiting an unconventional gate-tunable polar sliding and screening process. Moreover, its interaction with electron correlations in twisted bilayer graphene leads to modulated correlated states. Our findings establish moiré pattern reconstruction as a powerful strategy for engineering nanoscale polar structures and emergent quantum phases in van der Waals materials. |
| title | Polar Vortex Superstructure and Its Coupling with Correlated Electrons in Quasiperiodic Moire Crystal |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2502.20675 |