ITP OpenIR  > SCI期刊论文
Chen, Bin-Bin; Liao, Yuan Da3,4,5; Chen, Ziyu; Vafek, Oskar6,7; Kang, Jian8,9; Li, Wei10; Meng, Zi Yang1,2
Realization of topological Mott insulator in a twisted bilayer graphene lattice model
Source PublicationNATURE COMMUNICATIONS
Language英语
KeywordMAGIC-ANGLE LANDAU-LEVELS TRANSITIONS CASCADE
AbstractMagic-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
Volume12Issue:1Pages:5480
Cooperation Status国际
Subject AreaScience & Technology - Other Topics
MOST Discipline CatalogueMultidisciplinary Sciences
DOI10.1038/s41467-021-25438-1
Indexed BySCIE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27458
CollectionSCI期刊论文
Affiliation1.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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