石墨烯中新奇量子物态的研究  

The Novel Quantum States in Graphene

作　　者：李思宇 何林 LI Siyu;HE Lin(College of Materials Science and Engineering,Hunan University,Changsha 410000,People’s Republic of China;Center for Advanced Quantum Studies,Department of Physics,Beijing Normal University,Beijing 100875,People’s Republic of China)

机构地区：[1]湖南大学,材料科学与工程学院,长沙410000 [2]北京师范大学,物理学系,高等量子研究中心,北京100875

出　　处：《低温物理学报》2020年第4期169-184,共16页Low Temperature Physical Letters

摘　　要：石墨烯特殊的晶格结构和能带结构赋予了它独特的电学性质.近年来,分数量子霍尔态、魔角石墨烯中的关联绝缘体态和超导态等现象的发现不断证明着石墨烯是一种理想的二维模型体系,可用于实现一系列新奇的量子物态,对石墨烯中新奇量子物态的探测和调控也一直是凝聚态物理领域的前沿研究热点之一.本文将系统地介绍近年来石墨烯中对称性破缺量子物态的研究进展,包括平带中强关联量子物态的研究以及谷赝自旋调控的研究,并介绍一种在纳米尺度、单电子精度上探测二维材料体系简并度及对称性破缺态的普适方法,希望为相关领域的研究人员提供参考和借鉴.Because of the special lattice structure and band structure,graphene owns novel electronic properties.Recently,graphene has been proved to have considerable novel quantum states,since the observations of fractional quantum Hall state,correlated insulator states and superconducting states in magic-angle twisted bilayer graphene.Successfully detecting and manipulating these novel quantum states in graphene is one of the most attractive topics in condensed matter physics.This review will introduce the recent progresses about novel quantum states in graphene,including the studies of strong corelated states in flat bands of graphene and the studies of manipulating valley pseudo-spin of graphene.Furthermore,we also introduce a pervasive detecting method in 2 D materials,which could detect degeneracy and broken symmetry states at nanoscale and single-electron accuracy.We hope that this review could provide useful reference to related researchers.

关 键 词：石墨烯 量子物态 平带 电子-电子相互作用 谷赝自旋 

分 类 号：TQ127.11[化学工程—无机化工]