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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Wednesday, 30 May 2007
(at 12:30 in room Phy 8.1.09)
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Journal-Club
Shot noise in carbon nanotube based Fabry-Perot interferometers

Lorenz Herrmann

Institut für Experimentelle und Angewandte Physik
Universität Regensburg
   






(From cond-mat/0703123): We report on shot noise measurements in carbon nanotube based Fabry-Perot electronic interferometers. As a consequence of quantum interferences, the noise power spectral density oscillates as a function of the voltage applied to the gate electrode. The quantum shot noise theory accounts for the data quantitatively. It allows to confirm the existence of two nearly degenerate orbitals. At resonance, the transmission of the nanotube approaches unity, and the nanotube becomes noiseless, as observed in quantum point contacts. In this weak backscattering regime, the dependence of the noise on the backscattering current is found weaker than expected, pointing either to electron-electron interactions or to weak decoherence.



related paper (html)

Invited by G. Cuniberti, C. Strunk (JClub)

Within the Journal Club 52 315

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