Analytical study of surface states caused by the edge decoration

doi:10.1088/1674-1056/21/2/027302

中国物理B ›› 2012, Vol. 21 ›› Issue (2): 27302-027302.doi: 10.1088/1674-1056/21/2/027302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

赵媛媛,李炜,陶瑞宝

收稿日期:2011-08-01 修回日期:2011-10-18 出版日期:2012-01-30 发布日期:2012-01-30
通讯作者: 赵媛媛,zhaoyuanyuan@fudan.edu.cn E-mail:zhaoyuanyuan@fudan.edu.cn

Analytical study of surface states caused by the edge decoration

Zhao Yuan-Yuan(赵媛媛)^†, Li Wei(李炜), and Tao Rui-Bao(陶瑞宝)

State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China

Received:2011-08-01 Revised:2011-10-18 Online:2012-01-30 Published:2012-01-30
Contact: Zhao Yuan-Yuan,zhaoyuanyuan@fudan.edu.cn E-mail:zhaoyuanyuan@fudan.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10847001) and the National Basic Research Program of China (Grant Nos. 2009CB929204 and 2011CB921803).

摘要/Abstract

Abstract: Analytical studies of the effect of edge decoration on the energy spectrum of semi-infinite one-dimensional (1D) model and zigzag edged graphene (ZEG) are presented by means of transfer matrix method, in the frame of which the conditions for the existence of edge states are determined. For 1D model, the zero-energy surface state occurs regardless of whether the decorations exist or not, while the non-zero-energy surface states can be induced and manipulated through adjusting the edge decoration. On the other hand, the case for the semi-infinite ZEG model with nearest-neighbour interaction is discussed in the analogous way. The non-zero-energy surface states can be induced by the edge decoration and moreover, the ratio between the edge hopping and the bulk hopping amplitudes should be within a certain threshold.

Key words: surface states, zigzag edged graphene, transfer matrix method

中图分类号: (Electronic structure of graphene)

73.22.Pr

73.20.At (Surface states, band structure, electron density of states) 71.15.-m (Methods of electronic structure calculations)

赵媛媛,李炜,陶瑞宝. [J]. 中国物理B, 2012, 21(2): 27302-027302.

Zhao Yuan-Yuan(赵媛媛), Li Wei(李炜), and Tao Rui-Bao(陶瑞宝) . Analytical study of surface states caused by the edge decoration[J]. Chin. Phys. B, 2012, 21(2): 27302-027302.

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Analytical study of surface states caused by the edge decoration

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