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第 36 卷 第 3 期, pp.64-99  (2016) [ 36页 ]

双层转角石墨烯的结构和电学性质

殷隆晶
北京师范大学物理学系高等量子研究中心,北京,100875

乔佳斌
北京师范大学物理学系高等量子研究中心,北京,100875

何林
北京师范大学物理学系高等量子研究中心,北京,100875

2016/11/10 发布

石墨烯是第一个被发现的层状二维材料,它的电学性质对层数和层间的堆垛方式有很强的依赖性。而层间的转角可以被看作是调控石墨烯电学性质的又一个可控的自由度。本文主要综述双层转角石墨烯的基本结构与性质,重点讲述转角对双层石墨烯电学性质的影响。我们将从理论与实验结合的角度出发,介绍双层转角石墨烯中Dirac 费米子的新奇物理特性,重点阐述如何通过转角来调控石墨烯的电学性质。最后我们对双层转角石墨烯的研究现状进行总结和展望。
Graphene is the first man-made two-dimensional material. The electronic properties of multilayered graphene depend sensitively on the stacking order and number of the graphene layers. A twisted angle between graphene layers can be treated as another unique degree of freedom to tune the electronic properties of graphene system. In this paper, we give a review about the structures and electronic properties of twisted bilayer graphene and show the effect of the twisted angle on the electronic structures of graphene bilayer. Many interesting electronic properties, such as low-energy van Hove singularities, Fermi velocity renormalization, flat bands, and electronic localization, in twisted bilayers are introduced systematically. We also show how to tune the electronic structures of graphene systems by using a twist. Finally, a summary and erspective of the studies in the twisted bilayer graphene are given.

全文: [PDF]
中图分类号: O469
关键词: 石墨烯;层间堆垛;转角;电学性质;Dirac 费米子
Graphene; layer stacking; twisted angle; electronic property; Dirac Fermion.