Local and Non-local Shot Noise in Multiwalled Carbon Nanotubes

Details Local and Non-local Shot Noise in Multiwalled Carbon Nanotubes Local and Non-local Shot Noise in Multiwalled Carbon Nanotubes

2007-06-18

arxiv.org/abs/0706.2658v1

EPL 85, 37004 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1209/0295-5075/85/37004

We have investigated shot noise in multiterminal, diffusive 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. We obtain F_{tube}< 0.03 for the intrinsic Fano factor of our MWNTs.

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