Local and non-local shot noise in multiwalled carbon nanotubes

被引：1

作者：

Tsuneta, T. ^{[1
]}

Virtanen, P. ^{[1
]}

Wu, F. ^{[1
]}

Wang, T. ^{[2
]}

Heikkila, T. T. ^{[1
]}

Hakonen, P. J. ^{[1
]}

机构：

[1] Helsinki Univ Technol, Low Temp Lab, FI-02015 Espoo, Finland

[2] Chinese Acad Sci, Beijing, Peoples R China

来源：

EPL | 2009年 / 85卷 / 03期

基金：

芬兰科学院;

关键词：

CONDUCTION;

D O I：

10.1209/0295-5075/85/37004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated shot noise in multiterminal, disordered multiwalled carbon nanotubes (MWNTs) at 4.2K over the frequency f = 600-850 MHz. Quantitative comparison of our data to semiclassical theory, based on non-equilibrium distribution functions, indicates that a major part of the noise is caused by a non-equilibrium state imposed by the contacts. Our data exhibits non-local shot noise across weakly transmitting contacts while a low-impedance contact eliminates such noise almost fully. Within our model we obtain F(tube) < 0.1 for the intrinsic Fano factor of our MWNTs. This behavior cannot be explained by the presence of ballistic channels. Copyright (C) EPLA, 2009

引用

页数：6

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