Emergence of correlations in twisted monolayer-trilayer graphene heterostructures  

作　　者：周璋 Kenji Watanabe Takashi Taniguchi 林晓 毛金海 高鸿钧 Zhang Zhou;Kenji Watanabe;Takashi Taniguchi;Xiao Lin;Jinhai Mao;Hong-Jun Gao(School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100049,China;Advanced Materials Laboratory,National Institute for Materials Science,Tsukuba,305-0044,Japan;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100049,China [2]Advanced Materials Laboratory,National Institute for Materials Science,Tsukuba,305-0044,Japan [3]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics B》2023年第9期74-78,共5页中国物理B（英文版）

基　　金：the National Key R&D Program of China(Grant No.2019YFA0307800,J.M.);Beijing Natural Science Foundation(Grant No.Z190011,J.M.);the National Natural Science Foundation of China(Grant Nos.11974347,J.M.and 12204479,Z.Z.);Fundamental Research Funds for the Central Universities(J.M.)。

摘　　要：Twisted bilayer graphene heterostructures have recently emerged as a well-established platform for studying strongly correlated phases,such as correlated insulating,superconducting,and topological states.Extending this notion to twisted multilayer graphene heterostructures has exhibited more diverse correlated phases,as some fundamental properties related to symmetry and band structures are correspondingly modified.Here,we report the observations of correlated states in twisted monolayer-trilayer(Bernal stacked)graphene heterostructures.Correlated phases at integer fillings of the moire unit cell are revealed at a high displacement field and stabilized with a moderate magnetic field on the electron-doping side at a twist angle of 1.45°,where the lift of degeneracy at the integer fillings is observed in the Landau fan diagram.Our results demonstrate the effectiveness of moire engineering in an extended structure and provide insights into electric-field tunable correlated phases.

关 键 词：twisted multilayer graphene correlated states electric tuning 

分 类 号：O469[理学—凝聚态物理]