Graphene ribbons with a line of impurities: Opening of a gap

被引：49

作者：

Costa Filho, R. N. ^{[1
,2
]}

Farias, G. A. ^{[1
]}

Peeters, F. M. ^{[3
]}

机构：

[1] Univ Fed Ceara, Dept Fis, Caixa Postal 6030,Campus Pici, BR-60455760 Fortaleza, Ceara, Brazil

[2] Univ New Mexico, Consortium Amer Interdisciplinary Sci, Albuquerque, NM 87131 USA

[3] Univ Antwerp, Dept Phys, B-2020 Antwerp, Belgium

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.76.193409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A tight-binding model is used to study the role of impurities in a graphene ribbon. The graphene ribbon is made of lines of carbon atoms in an armchair or zigzag shape where the impurities are included in the ribbon substitutionally. The addition of a line of impurities opens up a gap in the energy spectrum. The size of it depends in a nonmonotonic way on the position of the impurity line, and also on the strength of the carbon-impurity interaction.

引用

页数：4

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