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

共 32 条

[21] Conductance quantization and transport gaps in disordered graphene nanoribbons [J].

Mucciolo, E. R. ;

Castro Neto, A. H. ;

Lewenkopf, C. H. .

PHYSICAL REVIEW B, 2009, 79 (07)

[22] Edge state in graphene ribbons: Nanometer size effect and edge shape dependence [J].

Nakada, K ;

Fujita, M ;

Dresselhaus, G ;

Dresselhaus, MS .

PHYSICAL REVIEW B, 1996, 54 (24) :17954-17961

[23] Chaotic dirac billiard in graphene quantum dots [J].

Ponomarenko, L. A. ;

Schedin, F. ;

Katsnelson, M. I. ;

Yang, R. ;

Hill, E. W. ;

Novoselov, K. S. ;

Geim, A. K. .

SCIENCE, 2008, 320 (5874) :356-358

[24] Suppression of the orientation effects on bandgap in graphene nanoribbons in the presence of edge disorder [J].

Querlioz, D. ;

Apertet, Y. ;

Valentin, A. ;

Huet, K. ;

Bournel, A. ;

Galdin-Retailleau, S. ;

Dollfus, P. .

APPLIED PHYSICS LETTERS, 2008, 92 (04)

[25] Numerical studies of variable-range hopping in one-dimensional systems [J].

Rodin, A. S. ;

Fogler, M. M. .

PHYSICAL REVIEW B, 2009, 80 (15)

[26] Anderson disorder in graphene nanoribbons: A local distribution approach [J].

Schubert, Gerald ;

Schleede, Jens ;

Fehske, Holger .

PHYSICAL REVIEW B, 2009, 79 (23)

[27] Coulomb blockade in graphene nanoribbons [J].

Sols, F. ;

Guinea, F. ;

Castro Neto, A. H. .

PHYSICAL REVIEW LETTERS, 2007, 99 (16)

[28] Energy gaps in graphene nanoribbons [J].

Son, Young-Woo ;

Cohen, Marvin L. ;

Louie, Steven G. .

PHYSICAL REVIEW LETTERS, 2006, 97 (21)

[29] Energy Gaps in Etched Graphene Nanoribbons [J].

Stampfer, C. ;

Guettinger, J. ;

Hellmueller, S. ;

Molitor, F. ;

Ensslin, K. ;

Ihn, T. .

PHYSICAL REVIEW LETTERS, 2009, 102 (05)

[30] Quantum Dot Behavior in Graphene Nanoconstrictions [J].

Todd, Kathryn ;

Chou, Hung-Tao ;

Amasha, Sami ;

Goldhaber-Gordon, David .

NANO LETTERS, 2009, 9 (01) :416-421

← 1 2 3 4 →