Lattice relaxation,mirror symmetry and magnetic field effects on ultraflat bands in twisted trilayer graphene

作     者：Zewen Wu Zhen Zhan Shengjun Yuan Zewen Wu;Zhen Zhan;Shengjun Yuan

作者机构：Key Laboratory of Artificial Mic ro-and Nano-strucures of the Minisry of EducationSchool of Physics and TechnologyWuhan UniversityWuhan 430072China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2021年第64卷第6期

页      面：114-120页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11774269,and 12047543) the National Key R&D Program of China(Grant No.2018FYA0305800) the Natural Science Foundation of Hubei Province China(Grant No.2020CFA041) 

主　　题：flat bands twisted trilayer graphene lattice relaxation mirror symmetry magnetic field tight-binding 

摘      要：Twisted graphene multilayers exhibit strongly correlated insulating states and superconductivity due to the presence of ultraflat bands near the charge neutral *** this paper,the response of ultraflat bands to lattice relaxation and a magnetic field in twisted trilayer graphene(tTLG)with different stacking arrangements is investigated by using a full tight-binding *** show that lattice relaxations are indispensable for understanding the electronic properties of tTLG,in particular,of tTLG in the presence of mirror *** relaxations renormalize the quasiparticle spectrum near the Fermi energy and change the localization of higher energy flat ***,different from the twisted bilayer graphene,the Hofstadter butterfly spectrum can be realized at laboratory accessible strengths of magnetic *** work verifies tTLG as a more tunable platform than the twisted bilayer graphene in strongly correlated phenomena.