Multi-oriented moire superstructures of graphene on Ir(111): experimental observations and theoretical models

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Multi-oriented moire superstructures of graphene on Ir(111): experimental observations and theoretical models
	Meng, L ; Wu, RT ; Zhang, LZ ; Li, LF ; Du, SX ; Wang, YL ; Gao, HJ
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2012
卷号	24 期号:31
关键词	EPITAXIAL GRAPHENE ADSORBED MONOLAYERS ROOM-TEMPERATURE RU(0001) OVERLAYERS GRAPHITE SURFACE STRAIN FILMS
ISSN号	0953-8984
通讯作者	Meng, L: Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	Six types of moire superstructures of graphene on Ir(111) with different orientations (labeled as R0, R14, R19, R23, R26 and R30) are investigated by low-energy electron diffraction, scanning tunneling microscopy and first-principles calculations. The moire superstructure of R0 graphene has remarkable diffraction spots and deeper corrugation than that of the other superstructures. A high-order commensurate (HOC) method is applied to produce a list of all possible graphene moire superstructures on Ir(111). Several useful structural data including the precise matrices of the moire patterns are revealed. Density functional theory based first-principles calculations that include van der Waals interactions reveal the differences of the geometric environment and electronic structures of carbon atoms with respect to the underlying Ir(111) lattices for all the observed moire patterns. The further calculations of electronic properties at the graphene-Ir interfaces show that the electron transfers for all superstructures are small and of the same order of magnitude, which demonstrates a weak interaction between graphene and the Ir(111) substrate, leading to the coexistence of multi-oriented moire superstructures.
收录类别	SCI
资助信息	MOST [2011CB932700, 2011CB921702, 2011CB828401]; NNSFC; CAS; SSC in China
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/42393]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Meng, L,Wu, RT,Zhang, LZ,et al. Multi-oriented moire superstructures of graphene on Ir(111): experimental observations and theoretical models[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2012,24(31).
APA	Meng, L.,Wu, RT.,Zhang, LZ.,Li, LF.,Du, SX.,...&Gao, HJ.(2012).Multi-oriented moire superstructures of graphene on Ir(111): experimental observations and theoretical models.JOURNAL OF PHYSICS-CONDENSED MATTER,24(31).
MLA	Meng, L,et al."Multi-oriented moire superstructures of graphene on Ir(111): experimental observations and theoretical models".JOURNAL OF PHYSICS-CONDENSED MATTER 24.31(2012).