| Issue |
EPL
Volume 85, Number 3, February 2009
|
|
|---|---|---|
| Article Number | 37004 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/85/37004 | |
| Published online | 13 February 2009 | |
Local and non-local shot noise in multiwalled carbon nanotubes
1
Low Temperature Laboratory, Helsinki University of Technology - FI-02015 Espoo, Finland, EU
2
Chinese Academy of Sciences - Beijing, China
Received:
20
April
2008
Accepted:
15
January
2009
We have investigated shot noise in multiterminal, disordered
multiwalled carbon nanotubes (MWNTs) at 4.2 K 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 
< 0.1 for the intrinsic Fano factor of our MWNTs. This behavior cannot be explained by the presence of ballistic channels.
PACS: 73.63.-b – Electronic transport in nanoscale materials and structures / 73.63.Fg – Nanotubes / 05.40.Ca – Noise
© EPLA, 2009
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