Building Large-Domain Twisted Bilayer Graphene with van Hove Singularity

doi:10.1021/acsnano.6b02046

CORC > 北京大学 > 化学与分子工程学院

	Building Large-Domain Twisted Bilayer Graphene with van Hove Singularity
	Tan, Zhenjun ; Yin, Jianbo ; Chen, Cheng ; Wang, Huan ; Lin, Li ; Sun, Luzhao ; Wu, Jinxiong ; Sun, Xiao ; Yang, Haifeng ; Chen, Yulin ; Peng, Hailin ; Liu, Zhongfan
刊名	ACS Nano
	2016
关键词	twisted bilayer graphene interlayer coupling van Hove singularity photocurrent enhancement OPTICAL CONDUCTIVITY SUPERLATTICES EXCITONS
DOI	10.1021/acsnano.6b02046
英文摘要	Twisted bilayer graphene (tBLG) with van Hove Singularity (VHS) has exhibited novel twist-angle-dependent chemical and physical phenomena. However, scalable production of high-quality tBLG is still in its infancy, especially lacking the angle controlled preparation methods. Here, we report a facile approach to prepare tBLG with large domain sizes (>100 mu m) and controlled twist angles by a clean layer-by-layer transfer of two constituent graphene monolayers. The whole process without interfacial polymer contamination in two monolayers guarantees the interlayer interaction of the pi-bond electrons, which gives rise to the existence of minigaps in electronic structures and the consequent formation of VHSs in density of state. Such perturbation on band structure was directly observed by angle-resolved photoemission spectroscopy with submicrometer spatial resolution (micro-ARPES). The VHSs lead to a strong light-matter interaction and thus introduce similar to 20-fold enhanced intensity of Raman G-band, which is a characteristic of high-quality tBLG. The as-prepared tBLG with strong light matter interaction was further fabricated into high-performance photodetectors with selectively enhanced photocurrent generation (up to similar to 6 times compared with monolayer in our device).; National Basic Research Program of China [2014CB932500, 2013CB932603, 2012CB933404]; National Natural Science Foundation of China [21173004, 51520105003, 51432002, 21222303, 51362029]; National Program for Support of Top-Notch Young Professionals; Beijing Municipal Science & Technology Commission [Z131100003213016, Z151100003315013]; SCI(E); EI; PubMed; ARTICLE; hlpeng@pku.edu.cn; zfliu@pku.edu.cn; 7; 6725-6730; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/433790]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Tan, Zhenjun,Yin, Jianbo,Chen, Cheng,et al. Building Large-Domain Twisted Bilayer Graphene with van Hove Singularity[J]. ACS Nano,2016.
APA	Tan, Zhenjun.,Yin, Jianbo.,Chen, Cheng.,Wang, Huan.,Lin, Li.,...&Liu, Zhongfan.(2016).Building Large-Domain Twisted Bilayer Graphene with van Hove Singularity.ACS Nano.
MLA	Tan, Zhenjun,et al."Building Large-Domain Twisted Bilayer Graphene with van Hove Singularity".ACS Nano (2016).