ITP OpenIR  > SCI期刊论文
Lin, Xiyue1; Chen, Bin-Bin; Li, Wei4; Meng, Zi Yang2,3; Shi, Tao
Exciton Proliferation and Fate of the Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model
Source PublicationPHYSICAL REVIEW LETTERS
Language英语
KeywordMAGIC-ANGLE REALIZATION TRANSITIONS ELECTRON CASCADE STATES BANDS
AbstractA topological Mott insulator (TMI) with spontaneous time-reversal symmetry breaking and nonzero Chern number has been discovered in a real-space effective model for twisted bilayer graphene (TBG) at 3/4 filling in the strong coupling limit [1]. However, the finite temperature properties of such a TMI state remain illusive. In this work, employing the state-of-the-art thermal tensor network and the perturbative field-theoretical approaches, we obtain the finite-T phase diagram and the dynamical properties of the TBG model. The phase diagram includes the quantum anomalous Hall and charge density wave phases at low T, and an Ising transition separating them from the high-T symmetric phases. Because of the proliferation of excitons-particle-hole bound states-the transitions take place at a significantly reduced temperature than the mean-field estimation. The exciton phase is accompanied with distinctive experimental signatures in such as in charge compressibilities and optical conductivities close to the transition. Our work explains the smearing of the many-electron state topology by proliferating excitons and opens an avenue for controlled many-body investigations on finite-temperature states in the TBG and other quantum moire ' systems.
2022
ISSN0031-9007
Volume128Issue:15Pages:157201
Cooperation Status国内
Subject AreaPhysics
MOST Discipline CataloguePhysics, Multidisciplinary
DOI10.1103/PhysRevLett.128.157201
Indexed BySCIE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27744
CollectionSCI期刊论文
Affiliation1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
3.Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China
4.Univ Hong Kong, HKU UCAS Joint Inst Theoret & Computat Phys, Pokfulam Rd, Hong Kong, Peoples R China
5.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China
Recommended Citation
GB/T 7714
Lin, Xiyue,Chen, Bin-Bin,Li, Wei,et al. Exciton Proliferation and Fate of the Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model[J]. PHYSICAL REVIEW LETTERS,2022,128(15):157201.
APA Lin, Xiyue,Chen, Bin-Bin,Li, Wei,Meng, Zi Yang,&Shi, Tao.(2022).Exciton Proliferation and Fate of the Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model.PHYSICAL REVIEW LETTERS,128(15),157201.
MLA Lin, Xiyue,et al."Exciton Proliferation and Fate of the Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model".PHYSICAL REVIEW LETTERS 128.15(2022):157201.
Files in This Item:
File Name/Size DocType Version Access License
Exciton Proliferatio(861KB)期刊论文出版稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lin, Xiyue]'s Articles
[Chen, Bin-Bin]'s Articles
[Li, Wei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lin, Xiyue]'s Articles
[Chen, Bin-Bin]'s Articles
[Li, Wei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lin, Xiyue]'s Articles
[Chen, Bin-Bin]'s Articles
[Li, Wei]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.