Room-temperature ballistic transport in narrow graphene strips

被引:167
作者
Gunlycke, D. [1 ]
Lawler, H. M. [1 ]
White, C. T. [1 ]
机构
[1] USN, Res Lab, Washington, DC 20375 USA
关键词
D O I
10.1103/PhysRevB.75.085418
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We investigate electron-phonon couplings, scattering rates, and mean free paths in zigzag-edge graphene strips with widths of the order of 10 nm. Our calculations for these graphene nanostrips show both the expected similarity with single-wall carbon nanotubes (SWNTs) and the suppression of the electron-phonon scattering due to a Dirichlet boundary condition that prohibits one major backscattering channel present in SWNTs. Low-energy acoustic phonon scattering is exponentially small at room temperature due to the large phonon wave vector required for backscattering. We find within our model that the electron-phonon mean free path is proportional to the width of the nanostrip and is approximately 70 mu m for an 11-nm-wide nanostrip.
引用
收藏
页数:5
相关论文
共 33 条
[1]   Impurity scattering in carbon nanotubes - Absence of back scattering [J].
Ando, T ;
Nakanishi, T .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1998, 67 (05) :1704-1713
[2]   Berry's phase and absence of back scattering in carbon nanotubes [J].
Ando, T ;
Nakanishi, T ;
Saito, R .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1998, 67 (08) :2857-2862
[3]   Ballistic transport in graphene nanostrips in the presence of disorder: Importance of edge effects [J].
Areshkin, Denis A. ;
Gunlycke, Daniel ;
White, Carter T. .
NANO LETTERS, 2007, 7 (01) :204-210
[4]   Electronic confinement and coherence in patterned epitaxial graphene [J].
Berger, Claire ;
Song, Zhimin ;
Li, Xuebin ;
Wu, Xiaosong ;
Brown, Nate ;
Naud, Cecile ;
Mayou, Didier ;
Li, Tianbo ;
Hass, Joanna ;
Marchenkov, Atexei N. ;
Conrad, Edward H. ;
First, Phillip N. ;
de Heer, Wait A. .
SCIENCE, 2006, 312 (5777) :1191-1196
[5]   Electronic states of graphene nanoribbons studied with the Dirac equation [J].
Brey, L ;
Fertig, HA .
PHYSICAL REVIEW B, 2006, 73 (23)
[6]   Phonons in carbon nanotubes [J].
Dresselhaus, MS ;
Eklund, PC .
ADVANCES IN PHYSICS, 2000, 49 (06) :705-814
[7]   Peculiar width dependence of the electronic properties of carbon nanoribbons [J].
Ezawa, M .
PHYSICAL REVIEW B, 2006, 73 (04)
[8]   Peculiar localized state at zigzag graphite edge [J].
Fujita, M ;
Wakabayashi, K ;
Nakada, K ;
Kusakabe, K .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (07) :1920-1923
[9]   Lattice distortion in nanographite ribbons [J].
Fujita, M ;
Igami, M ;
Nakada, K .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1997, 66 (07) :1864-1867
[10]   A NEW TIGHT-BINDING PARAMETRIZATION FOR CARBON [J].
GOODWIN, L .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (22) :3869-3878