Magnetic response in finite carbon graphene sheets and nanotubes

被引：18

作者：

Lopez-Urias, F. ^{[1
]}

Rodriguez-Manzo, J. A. ^{[1
]}

Munoz-Sandoval, E. ^{[1
]}

Terrones, M. ^{[1
]}

Terrones, H. ^{[1
]}

机构：

[1] IPICYT, Adv Mat Dept, San Luis Potosi 78216, SLP, Mexico

来源：

OPTICAL MATERIALS | 2006年 / 29卷 / 01期

关键词：

carbon nanostructures; nanotubes; graphene; fullerenes; magnetism;

D O I：

10.1016/j.optmat.2006.03.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic and magnetic properties of graphene sheets with armchair and zig-zag edges are investigated using the Huckel tight binding model in conjunction with the London approximation. It is observed that in the presence of a perpendicular external magnetic field, the nanographenes show a diamagnetic behavior exhibiting counter-clockwise ring currents. Topological defects such as vacancies, Stone-Wale transformations (bond rotations) and holes are introduced in the graphene sheets in order to enhance local paramagnetic ring currents. These ring currents produce a local magnetic moment perpendicular to the defective site. In addition, current flows in finite carbon nanotubes are investigated. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：110 / 115

页数：6

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