Quantum Dot Behavior in Graphene Nanoconstrictions

被引：177

作者：

Todd, Kathryn ^{[1
]}

Chou, Hung-Tao ^{[2
]}

Amasha, Sami ^{[1
]}

Goldhaber-Gordon, David ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 01期

基金：

美国国家科学基金会;

关键词：

TRANSPORT;

D O I：

10.1021/nl803291b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene nanoribbons display an imperfectly understood transport gap. We measure transport through nanoribbon devices of several lengths. In long (>= 250 nm) nanoribbons we observe transport through multiple quantum dots in series, while shorter (<= 60 nm) constrictions display behavior characteristic of single and double quantum dots. New measurements indicate that dot size may scale with constriction width. We propose a model where transport occurs through quantum dots that are nucleated by background disorder potential in the presence of a confinement gap.

引用

收藏

页码：416 / 421

页数：6

相关论文

共 28 条

[1] Density inhomogeneity driven percolation metal-insulator transition and dimensional crossover in graphene nanoribbons [J].

Adam, S. ;

Cho, S. ;

Fuhrer, M. S. ;

Das Sarma, S. .

PHYSICAL REVIEW LETTERS, 2008, 101 (04)

[2] Screening effect and impurity scattering in monolayer graphene [J].

Ando, Tsuneya .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2006, 75 (07)

[3] Ultrahigh electron mobility in suspended graphene [J].

Bolotin, K. I. ;

Sikes, K. J. ;

Jiang, Z. ;

Klima, M. ;

Fudenberg, G. ;

Hone, J. ;

Kim, P. ;

Stormer, H. L. .

SOLID STATE COMMUNICATIONS, 2008, 146 (9-10) :351-355

[4] Macroscopic graphene membranes and their extraordinary stiffness [J].

Booth, Tim J. ;

Blake, Peter ;

Nair, Rahul R. ;

Jiang, Da ;

Hill, Ernie W. ;

Bangert, Ursel ;

Bleloch, Andrew ;

Gass, Mhairi ;

Novoselov, Kostya S. ;

Katsnelson, M. I. ;

Geim, A. K. .

NANO LETTERS, 2008, 8 (08) :2442-2446

[5] Electronic states of graphene nanoribbons studied with the Dirac equation [J].

Brey, L ;

Fertig, HA .

PHYSICAL REVIEW B, 2006, 73 (23)

[6] Friedel oscillations, impurity scattering, and temperature dependence of resistivity in graphene [J].

Cheianov, Vadim V. ;

Fal'ko, Vladimir I. .

PHYSICAL REVIEW LETTERS, 2006, 97 (22)

[7] Charged-impurity scattering in graphene [J].

Chen, J. -H. ;

Jang, C. ;

Adam, S. ;

Fuhrer, M. S. ;

Williams, E. D. ;

Ishigami, M. .

NATURE PHYSICS, 2008, 4 (05) :377-381

[8] Graphene nano-ribbon electronics [J].

Chen, Zhihong ;

Lin, Yu-Ming ;

Rooks, Michael J. ;

Avouris, Phaedon .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2007, 40 (02) :228-232

[9]

DERAEDT H, 2008, ELECT ENERGY LEVEL S

[10]

EVALDSSON M, 2008, EDGE DISORDER INDUCE