Shot noise with interaction effects in single-walled carbon nanotubes.
We have measured shot noise in single-walled carbon nanotubes with good contacts at 4.2 K at low frequencies (f=600-850 MHz). We find a strong modulation of shot noise over the Fabry-Perot pattern; in terms of the differential Fano factor the variation ranges over 0.4-1.2. The shot noise variation, in combination with differential conductance, is analyzed using two (spin-degenerate) modes with different, energy-dependent transmission coefficients. Deviations from the predictions from Landauer-Buttiker formalism are assigned to electron-electron interactions.
Wu
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F
Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, 02015 HUT, Espoo, Finland.
Queipo
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P
Nasibulin
A
A
Tsuneta
T
T
Wang
T H
TH
Kauppinen
E
E
Hakonen
P J
PJ