Scaling of the localization length in armchair-edge graphene nanoribbons

被引：15
作者：
Gunlycke, D. [1 ]
White, C. T. [1 ]
机构：
[1] USN, Res Lab, Washington, DC 20375 USA
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 07期
关键词：
CARBON NANOTUBES; LAYER GRAPHENE; TRANSPORT; NANOSTRIPS;
D O I：
10.1103/PhysRevB.81.075434
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A two-band model that includes edge interactions is derived for hydrogen-terminated, armchair-edge graphene nanoribbons. This model is then used to obtain analytical expressions for the localization length of these ribbons in the presence of environmental and topological edge disorder. Within the single-channel regime, it is found that the maximum localization length of a ribbon with uncorrelated edge disorder is proportional to the square of its width. Also shown is the dependence of the localization length on quasiparticle energy and band gap. The analytical expressions have been verified by numerical transport calculations that take all pi channels into account.
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页数：6
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