Effect of hydrogen dimers on the electronic structure of graphene

被引：2
作者：
Zhang, De-Sheng [1 ]
Li, Jun
机构：
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
来源：
PHYSICS LETTERS A | 2014年 / 378卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Graphene; Adsorption; Hydrogen dimer; Electronic structure; EPITAXIAL GRAPHENE; ATOMIC-HYDROGEN; ADSORPTION;
D O I：
10.1016/j.physleta.2013.10.026
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the effect of hydrogen dimers on the electronic structure of graphene. Using Green's function and the T-matrix approach, we calculate the local density of states of graphene with single hydrogen dimer, as well as the quasiparticle spectral function of graphene with a finite concentration of randomly distributed hydrogen dimers. Our results show that the effect of dimer adsorption is dramatically different from that of monomer adsorption previously studied, and strongly depends on the configuration of the dimer. The features of the plotted spectral function of graphene are relevant to the band gap opening and the metal-insulator transition. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：68 / 72
页数：5
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