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Fluctuations quantiques de courant dans les nanotubes de carbone

Abstract : This thesis is devoted to the study of electronic transport in single wall carbon nanotubes through current fluctuations. The framework of the thesis is mesoscopic physics in ballistic conductors. Many different regimes can be observed in this type of conductors : Coulomb blockade oscillations, Fabry-Perot interferences, Kondo effect. We have studied current fluctuations in a Fabry-Perot like interfeormeter which is very well suited to study the weakly interacting regime. Using the Landauer-B¨uttiker formalism, we find a good agreement with the theory. In particular, we observe the noise suppression in the unitary limit. The combination of conductance and noise measurements is found to be a powerful means to probe non-degenerate conduction channel. The Kondo effect is also studied. We find a universality in the conductance and in the noise. These experimental findings are analysed with a slave boson mean field theory. The data are found to be well accounted for by this approach. Finally, we analyse a situation in an Hanbury Brown and Twiss setup with a multiwall as an injector of electrons in the single wall carbon nanotube.
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Submitted on : Friday, October 22, 2010 - 9:30:37 PM
Last modification on : Thursday, December 10, 2020 - 12:37:02 PM
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  • HAL Id : tel-00528936, version 1


Thomas Delattre. Fluctuations quantiques de courant dans les nanotubes de carbone. Matière Condensée [cond-mat]. Université Pierre et Marie Curie - Paris VI, 2009. Français. ⟨tel-00528936⟩



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