Controlled alignment of supermoiré lattice in double-aligned graphene heterostructures
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916551204012032 |
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| author | Hu, Junxiong Tan, Junyou Ezzi, Mohammed M. Al Chattopadhyay, Udvas Gou, Jian Zheng, Yuntian Wang, Zihao Chen, Jiayu Thottathil, Reshmi Luo, Jiangbo Watanabe, Kenji Taniguchi, Takashi Wee, Andrew Thye Shen Adam, Shaffique Ariando, Ariando |
| author_facet | Hu, Junxiong Tan, Junyou Ezzi, Mohammed M. Al Chattopadhyay, Udvas Gou, Jian Zheng, Yuntian Wang, Zihao Chen, Jiayu Thottathil, Reshmi Luo, Jiangbo Watanabe, Kenji Taniguchi, Takashi Wee, Andrew Thye Shen Adam, Shaffique Ariando, Ariando |
| contents | The supermoiré lattice, built by stacking two moiré patterns, provides a platform for creating flat mini-bands and studying electron correlations. An ultimate challenge in assembling a graphene supermoiré lattice is in the deterministic control of its rotational alignment, which is made highly aleatory due to the random nature of the edge chirality and crystal symmetry of each component layer. Employing the so-called golden rule of three, here we present an experimental strategy to overcome this challenge and realize the controlled alignment of double-aligned hBN/graphene/hBN supermoiré lattice, where graphene is precisely aligned with both top hBN and bottom hBN. Remarkably, we find that the crystallographic edge of neighboring graphite can be used to better guide the stacking alignment, as demonstrated by the controlled production of 20 moiré samples with an accuracy better than 0.2 degree. Finally, we extend our technique to other strongly correlated electron systems, such as low-angle twisted bilayer graphene and ABC-stacked trilayer graphene, providing a strategy for flat-band engineering in these moiré materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_12124 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Controlled alignment of supermoiré lattice in double-aligned graphene heterostructures Hu, Junxiong Tan, Junyou Ezzi, Mohammed M. Al Chattopadhyay, Udvas Gou, Jian Zheng, Yuntian Wang, Zihao Chen, Jiayu Thottathil, Reshmi Luo, Jiangbo Watanabe, Kenji Taniguchi, Takashi Wee, Andrew Thye Shen Adam, Shaffique Ariando, Ariando Mesoscale and Nanoscale Physics Materials Science The supermoiré lattice, built by stacking two moiré patterns, provides a platform for creating flat mini-bands and studying electron correlations. An ultimate challenge in assembling a graphene supermoiré lattice is in the deterministic control of its rotational alignment, which is made highly aleatory due to the random nature of the edge chirality and crystal symmetry of each component layer. Employing the so-called golden rule of three, here we present an experimental strategy to overcome this challenge and realize the controlled alignment of double-aligned hBN/graphene/hBN supermoiré lattice, where graphene is precisely aligned with both top hBN and bottom hBN. Remarkably, we find that the crystallographic edge of neighboring graphite can be used to better guide the stacking alignment, as demonstrated by the controlled production of 20 moiré samples with an accuracy better than 0.2 degree. Finally, we extend our technique to other strongly correlated electron systems, such as low-angle twisted bilayer graphene and ABC-stacked trilayer graphene, providing a strategy for flat-band engineering in these moiré materials. |
| title | Controlled alignment of supermoiré lattice in double-aligned graphene heterostructures |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2301.12124 |