Non-Fermi liquid behavior in transport across carbon nanotube quantum dots

Abstract

A low energy-theory for non-linear transport in finite-size single-wall carbon nanotubes, based on a microscopic model for the interacting pz electrons and successive bosonization, is presented. Due to the multiple degeneracy of the energy spectrum diagonal as well as off-diagonal (coherences) elements of the reduced density matrix contribute to the nonlinear transport. A four-electron periodicity with a characteristic ratio between adjacent peaks, as well as nonlinear transport features, in quantitative agreement with recent experiments, are predicted.

5 pages, 3 figures

References in corpus (2)

• Four-electron shell structures and an interacting two-electron system in carbon nanotube quantum dots
• Electronic excitation spectrum of metallic carbon nanotubes

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• Vibration induced memory effects and switching in ac-driven molecular nanojunctions
• Linear conductance of an interacting carbon nanotube ring
• Transport properties of double-walled carbon nanotube quantum dots