Electron Transport in Disordered Graphene Nanoribbons

被引：418

作者：

Han, Melinda Y. ^{[1
,2
]}

Brant, Juliana C. ^{[1
,2
,3
]}

Kim, Philip ^{[1
,2
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

[2] Columbia Univ, Dept Appl Phys, New York, NY 10027 USA

[3] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 05期

关键词：

RIBBONS;

D O I：

10.1103/PhysRevLett.104.056801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report an electron transport study of lithographically fabricated graphene nanoribbons (GNRs) of various widths and lengths. At the charge neutrality point, a length-independent transport gap forms whose size is inversely proportional to the GNR width. In this gap, electrons are localized, and charge transport exhibits a transition between thermally activated behavior at higher temperatures and variable range hopping at lower temperatures. By varying the geometric capacitance, we find that charging effects constitute a significant portion of the activation energy.

引用

页数：4

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