Conductance through a single impurity in the metallic zigzag carbon nanotube

被引：7

作者：

Chang, Po-Yao ^{[1
]}

Lin, Hsiu-Hau ^{[1
,2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[2] Natl Ctr Theoret Sci, Div Phys, Hsinchu 30013, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 08期

关键词：

carbon nanotubes; electric admittance; impurities; tunnelling; DEFECTS; TRANSPORT; ELECTRON; GRAPHENE; STATES;

D O I：

10.1063/1.3213546

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the conductance through a single impurity in the metallic zigzag carbon nanotube and find that it sensitively depends on the impurity strength and the bias voltage. The interplay between the current-carrying scattering states and the evanescent modes lead to rich phenomena including resonant backward scattering, perfect tunneling, and charge accumulations. In addition to the Friedel sum rule, we also find an exact relation between the conductance and the scattering phase. Finally, relevance of our findings to the realistic transport in carbon nanotubes is discussed.

引用

页数：3

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