Exciton effects in armchair graphene nanoribbons

被引：14
|
作者：
Jia, Y. L. [1 ]
Geng, X. [1 ]
Sun, H. [1 ]
Luo, Y. [1 ]
机构：
[1] Xinyang Normal Univ, Coll Phys & Elect Engn, Xinyang 464000, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL B | 2011年 / 83卷 / 04期
基金：
中国国家自然科学基金;
关键词：
CARBON NANOTUBES; RIBBONS; EDGE;
D O I：
10.1140/epjb/e2011-20060-y
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have studied the exciton effects in armchair graphene nanoribbons systematically, using the nonorthogonal tight-binding model supplement by the long-range Coulomb interactions. It is found from our calculations that the excitation energies, the exciton binding energies and the exciton wave function sizes of the E (11) and E (22) excitons all exhibit oscillation as a function of the ribbon width. And there is a phase shift of pi between the oscillation of the E (11) and E (22) excitons.
引用
收藏
页码：451 / 455
页数：5
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