Knowledge Management System of Institute of Theoretical Physics, CAS
Chen, Bin-Bin; Liao, Yuan Da3,4,5; Chen, Ziyu; Vafek, Oskar6,7; Kang, Jian8,9; Li, Wei10 ; Meng, Zi Yang1,2
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| Realization of topological Mott insulator in a twisted bilayer graphene lattice model | |
| Source Publication | NATURE COMMUNICATIONS
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| Language | 英语 |
| Keyword | MAGIC-ANGLE LANDAU-LEVELS TRANSITIONS CASCADE |
| Abstract | Magic-angle twisted bilayer graphene has recently become a thriving material platform realizing correlated electron phenomena taking place within its topological flat bands. Several numerical and analytical methods have been applied to understand the correlated phases therein, revealing some similarity with the quantum Hall physics. In this work, we provide a Mott-Hubbard perspective for the TBG system. Employing the large-scale density matrix renormalization group on the lattice model containing the projected Coulomb interactions only, we identify a first-order quantum phase transition between the insulating stripe phase and the quantum anomalous Hall state with the Chern number of +/- 1. Our results not only shed light on the mechanism of the quantum anomalous Hall state discovered at three-quarters filling, but also provide an example of the topological Mott insulator, i.e., the quantum anomalous Hall state in the strong coupling limit. |
| 2021 | |
| Volume | 12Issue:1Pages:5480 |
| Cooperation Status | 国际 |
| Subject Area | Science & Technology - Other Topics |
| MOST Discipline Catalogue | Multidisciplinary Sciences |
| DOI | 10.1038/s41467-021-25438-1 |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/27458 |
| Collection | SCI期刊论文 |
| Affiliation | 1.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 2.Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China 3.Univ Hong Kong, Joint Inst Theoret & Computat Phys, HKU UCAS, Pokfulam Rd, Hong Kong, Peoples R China 4.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 6.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100190, Peoples R China 7.Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA 8.Natl High Magnet Field Lab, Tallahassee, FL 32310 USA 9.Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China 10.Soochow Univ, Inst Adv Study, Suzhou 215006, Peoples R China 11.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Chen, Bin-Bin,Liao, Yuan Da,Chen, Ziyu,et al. Realization of topological Mott insulator in a twisted bilayer graphene lattice model[J]. NATURE COMMUNICATIONS,2021,12(1):5480. |
| APA | Chen, Bin-Bin.,Liao, Yuan Da.,Chen, Ziyu.,Vafek, Oskar.,Kang, Jian.,...&Meng, Zi Yang.(2021).Realization of topological Mott insulator in a twisted bilayer graphene lattice model.NATURE COMMUNICATIONS,12(1),5480. |
| MLA | Chen, Bin-Bin,et al."Realization of topological Mott insulator in a twisted bilayer graphene lattice model".NATURE COMMUNICATIONS 12.1(2021):5480. |
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