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

页码：451 / 455

页数：5

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