Engineering nonlinear Hall effect in bilayer graphene/black phosphorus heterostructures
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866929683928449024 |
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| author | Ye, Xing-Guo Zhang, Zhen-Tao Zhu, Peng-Fei Xu, Wen-Zheng Wang, An-Qi Liao, Zhi-Min |
| author_facet | Ye, Xing-Guo Zhang, Zhen-Tao Zhu, Peng-Fei Xu, Wen-Zheng Wang, An-Qi Liao, Zhi-Min |
| contents | Two-dimensional van der Waals materials offer a highly tunable platform for generating emergent quantum phenomena through symmetry breaking. Stacking-induced symmetry breaking at interfaces provides an effective method to modulate their electronic properties for functional devices. Here, we strategically stack bilayer graphene with black phosphorus, a low-symmetry semiconductor, to break the symmetries and induce the nonlinear Hall effect (NLHE) that can persist up to room temperature. Intriguingly, it is found the NLHE undergoes sign reversals by varying the electrical displacement field under fixed carrier density. The scaling analysis reveals that the sign reversal of the NLHE is contributed from both the Berry curvature dipole (BCD) and extrinsic scatterings. The displacement field-induced sign reversal of the BCD indicates asymmetric distributions of Berry curvature hot spots across different Fermi pockets in bilayer graphene. Our findings suggest that symmetry engineering of van der Waals heterostructures is promising for room-temperature applications based on nonlinear quantum devices, such as high-frequency rectifiers and wireless charging. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_12648 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Engineering nonlinear Hall effect in bilayer graphene/black phosphorus heterostructures Ye, Xing-Guo Zhang, Zhen-Tao Zhu, Peng-Fei Xu, Wen-Zheng Wang, An-Qi Liao, Zhi-Min Mesoscale and Nanoscale Physics Materials Science Two-dimensional van der Waals materials offer a highly tunable platform for generating emergent quantum phenomena through symmetry breaking. Stacking-induced symmetry breaking at interfaces provides an effective method to modulate their electronic properties for functional devices. Here, we strategically stack bilayer graphene with black phosphorus, a low-symmetry semiconductor, to break the symmetries and induce the nonlinear Hall effect (NLHE) that can persist up to room temperature. Intriguingly, it is found the NLHE undergoes sign reversals by varying the electrical displacement field under fixed carrier density. The scaling analysis reveals that the sign reversal of the NLHE is contributed from both the Berry curvature dipole (BCD) and extrinsic scatterings. The displacement field-induced sign reversal of the BCD indicates asymmetric distributions of Berry curvature hot spots across different Fermi pockets in bilayer graphene. Our findings suggest that symmetry engineering of van der Waals heterostructures is promising for room-temperature applications based on nonlinear quantum devices, such as high-frequency rectifiers and wireless charging. |
| title | Engineering nonlinear Hall effect in bilayer graphene/black phosphorus heterostructures |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2501.12648 |