Tuning structures and electronic spectra of graphene layers with tilt grain boundaries

Long Jing Yin, Jia Bin Qiao, Wen Xiao Wang, Zhao Dong Chu, Kai Fen Zhang, Rui Fen Dou, Chun Lei Gao, Jin Feng Jia, Jia Cai Nie, Lin He*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

42 引用 (Scopus)

摘要

Despite the fact that structures and properties of tilt grain boundaries of graphite surface and graphene have been extensively studied, their effect on the structures and electronic spectra of graphene layers has not been fully addressed. Here we study effects of one-dimensional tilt grain boundaries on structures and electronic spectra of graphene multilayers by scanning tunneling microscopy and spectroscopy. A tilt grain boundary of a top graphene sheet in graphene multilayers leads to a twist between consecutive layers and generates superstructures (Moiré patterns) on one side of the boundary. Our results demonstrate that the twisting changes the electronic spectra of Bernal graphene bilayer and graphene trilayers dramatically. We also study quantum-confined twisted graphene bilayer generated between two adjacent tilt grain boundaries and find that the band structure of such a system is still valid even when the number of superstructures is reduced to two in one direction. It implies that the electronic structure of this system is driven by the physics of a single Moiré spot.

源语言英语
文章编号205410
期刊Physical Review B - Condensed Matter and Materials Physics
89
20
DOI
出版状态已出版 - 8 5月 2014
已对外发布

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