摘要
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 multilay- ered 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 local- ization, 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 perspective of the studies in the twisted bilayer graphene are given.
出处
《物理学进展》
CSCD
北大核心
2016年第3期65-99,共35页
Progress In Physics
基金
国家自然科学基金委
科技部国家重点基础研究发展计划
中组部"万人计"青年拔尖人才支持计划
北京师范大学的经费支持
