Topological-Defect-Induced Superstructures on Graphite Surface
Zi-Lin Ruan , Zhen-Liang Hao , Hui Zhang , Shi-Jie Sun , Yong Zhang , Wei Xiong , Xing-Yue Wang , Jian-Chen Lu* , and Jin-Ming Cai
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650000, China
Abstract ：Topological defects in graphene induce structural and electronic modulations. Knowing exact nature of broken-symmetry states around the individual atomic defects of graphene is very important for understanding the electronic properties of this material. We investigate structural dependence on localized electronic states in the vicinity of topological defects on a highly oriented pyrolytic graphite (HOPG) surface, using scanning tunneling microscopy and spectroscopy. Several inherent topological defects on the HOPG surface and the local density of states surrounding them are explored, visualized as scattering wave-related ($\sqrt{3} \times \sqrt{3}$) R30$^{\circ}$ superstructures and honeycomb superstructures. In addition, the superstructures observed near the grain boundary have a much higher decay length at specific sites than that reported previously, indicating far greater electron scattering on the quasi-periodic grain boundary.
收稿日期: 2020-08-27
出版日期: 2021-01-27
:
72.10.Fk
(Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))
73.20.-r
(Electron states at surfaces and interfaces)
73.22.Pr
(Electronic structure of graphene)
引用本文:
. [J]. 中国物理快报, 2021, 38(2): 27201-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/38/2/027201
或
https://cpl.iphy.ac.cn/CN/Y2021/V38/I2/27201
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2021, Vol. 38 
