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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2311.07533 |
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| _version_ | 1866913467572682752 |
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| author | Mao, Ning Xu, Cheng Li, Jiangxu Bao, Ting Liu, Peitao Xu, Yong Felser, Claudia Fu, Liang Zhang, Yang |
| author_facet | Mao, Ning Xu, Cheng Li, Jiangxu Bao, Ting Liu, Peitao Xu, Yong Felser, Claudia Fu, Liang Zhang, Yang |
| contents | Large-scale moiré systems are extraordinarily sensitive, with even minute atomic shifts leading to significant changes in electronic structures. Here, we investigate the lattice relaxation effect on moiré band structures in twisted bilayer MoTe$_2$ with two approaches: (a) large-scale plane-wave basis first principle calculation down to $2.88^{\circ}$, (b) transfer learning structure relaxation + local-basis first principles calculation down to $1.1^{\circ}$. We use two types of van der Waals corrections: the D2 method of Grimme and the density-dependent energy correction, and find that the density-dependent energy correction yields a continuous evolution of bandwidth with twist angles. Based on the above results. we develop a more complete continuum model with a single set of parameters for a wide range of twist angles, and perform many-body simulations at $ν=-1,-2/3, -1/3$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_07533 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Transfer learning relaxation, electronic structure and continuum model for twisted bilayer MoTe$_2$ Mao, Ning Xu, Cheng Li, Jiangxu Bao, Ting Liu, Peitao Xu, Yong Felser, Claudia Fu, Liang Zhang, Yang Strongly Correlated Electrons Large-scale moiré systems are extraordinarily sensitive, with even minute atomic shifts leading to significant changes in electronic structures. Here, we investigate the lattice relaxation effect on moiré band structures in twisted bilayer MoTe$_2$ with two approaches: (a) large-scale plane-wave basis first principle calculation down to $2.88^{\circ}$, (b) transfer learning structure relaxation + local-basis first principles calculation down to $1.1^{\circ}$. We use two types of van der Waals corrections: the D2 method of Grimme and the density-dependent energy correction, and find that the density-dependent energy correction yields a continuous evolution of bandwidth with twist angles. Based on the above results. we develop a more complete continuum model with a single set of parameters for a wide range of twist angles, and perform many-body simulations at $ν=-1,-2/3, -1/3$. |
| title | Transfer learning relaxation, electronic structure and continuum model for twisted bilayer MoTe$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2311.07533 |