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

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

2006-06-08

arxiv.org/abs/cond-mat/0606214v1

Phys. Rev. B 74, 121403(R) (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.74.121403

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.

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