title: Modulating the Electronic Properties of Monolayer Graphene Using a Periodic Quasi-One-Dimensional Potential Generated by Hex-Reconstructed Au(001).
abstract: The structural and electronic properties of monolayer graphene synthesized on a periodically reconstructed substrate can be widely modulated by the generation of superstructure patterns, thereby producing interesting physical properties, such as magnetism and superconductivity. Herein, using a facile chemical vapor deposition method, we successfully synthesized high-quality monolayer graphene with a uniform thickness on Au foils. The hex-reconstruction of Au(001), which is characterized by striped patterns with a periodicity of 1.44 nm, promoted the formation of a quasi-one-dimensional (1D) graphene superlattice, which served as a periodic quasi-1D modulator for the graphene overlayer, as evidenced by scanning tunneling microscopy/spectroscopy. Intriguingly, two new Dirac points were generated for the quasi-1D graphene superlattice located at -1.73 ± 0.02 and 1.12 ± 0.12 eV. Briefly, this work demonstrates that the periodic modulation effect of reconstructed metal substrates can dramatically alter the electronic properties of graphene and provides insight into the modulation of these properties using 1D potentials.
authors.forename: Xiebo
authors.initials: X
authors.lastname: Zhou
authors.forename: Yue
authors.initials: Y
authors.lastname: Qi
authors.forename: Jianping
authors.initials: J
authors.lastname: Shi
authors.affiliation: Collaborative Innovation Center of Quantum Matter , Beijing 100871, People's Republic of China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Niu
authors.forename: Mengxi
authors.initials: M
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, People's Republic of China.
authors.forename: Guanhua
authors.initials: G
authors.lastname: Zhang
authors.forename: Qiucheng
authors.initials: Q
authors.lastname: Li
authors.forename: Zhepeng
authors.initials: Z
authors.lastname: Zhang
authors.forename: Min
authors.initials: M
authors.lastname: Hong
authors.forename: Qingqing
authors.initials: Q
authors.lastname: Ji
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhongfan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Collaborative Innovation Center of Quantum Matter , Beijing 100871, People's Republic of China.
authors.forename: Xiaosong
authors.initials: X
authors.lastname: Wu
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Zhang
keywords: Au(001); atomic structure; graphene; new Dirac points; scanning tunneling microscopy/spectroscopy