Superlattice Dirac points and space-dependent Fermi velocity in a   corrugated graphene monolayer

doi:10.1103/PhysRevB.87.075405

CORC > 北京大学 > 化学与分子工程学院

	Superlattice Dirac points and space-dependent Fermi velocity in a corrugated graphene monolayer
	Yan, Hui ; Chu, Zhao-Dong ; Yan, Wei ; Liu, Mengxi ; Meng, Lan ; Yang, Mudan ; Fan, Yide ; Wang, Jiang ; Dou, Rui-Fen ; Zhang, Yanfeng ; Liu, Zhongfan ; Nie, Jia-Cai ; He, Lin
刊名	physical review b
	2013
关键词	ELECTRONIC-PROPERTIES MAGNETIC-FIELD SCALE MOIRE FOILS
DOI	10.1103/PhysRevB.87.075405
英文摘要	Recent studies show that periodic potentials can generate superlattice Dirac points at energies +/-(h) over bar nu(F)vertical bar G vertical bar/2 in graphene (where (h) over bar is the reduced Planck constant, nu(F) is the Fermi velocity of graphene, and G is the reciprocal superlattice vector). Here, we perform scanning tunneling microscopy and spectroscopy studies of a corrugated graphene monolayer on Rh foil. We show that the quasiperiodic ripples of nanometer wavelength in the corrugated graphene give rise to weak one-dimensional electronic potentials and thereby lead to the emergence of the superlattice Dirac points. The position of the superlattice Dirac point is space dependent and shows a wide distribution of values. We demonstrate that the space-dependent superlattice Dirac points are closely related to the space-dependent Fermi velocity, which may arise from the effect of the local strain and the strong electron-electron interaction in the corrugated graphene. DOI: 10.1103/PhysRevB.87.075405; Physics, Condensed Matter; SCI(E); 19; ARTICLE; 7; 87
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/391998]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Yan, Hui,Chu, Zhao-Dong,Yan, Wei,et al. Superlattice Dirac points and space-dependent Fermi velocity in a corrugated graphene monolayer[J]. physical review b,2013.
APA	Yan, Hui.,Chu, Zhao-Dong.,Yan, Wei.,Liu, Mengxi.,Meng, Lan.,...&He, Lin.(2013).Superlattice Dirac points and space-dependent Fermi velocity in a corrugated graphene monolayer.physical review b.
MLA	Yan, Hui,et al."Superlattice Dirac points and space-dependent Fermi velocity in a corrugated graphene monolayer".physical review b (2013).