Zero-bias conductance in carbon nanotube quantum dots.


Journal Article

We present numerical renormalization group calculations for the zero-bias conductance of quantum dots made from semiconducting carbon nanotubes. These explain and reproduce the thermal evolution of the conductance for different groups of orbitals, as the dot-lead tunnel coupling is varied and the system evolves from correlated Kondo behavior to more weakly correlated regimes. For integer fillings N=1, 2, 3 of an SU(4) model, we find universal scaling behavior of the conductance that is distinct from the standard SU(2) universal conductance, and concurs quantitatively with experiment. Our results also agree qualitatively with experimental differential conductance maps.

Full Text

Duke Authors

Cited Authors

  • Anders, FB; Logan, DE; Galpin, MR; Finkelstein, G

Published Date

  • February 29, 2008

Published In

Volume / Issue

  • 100 / 8

Start / End Page

  • 086809 -

PubMed ID

  • 18352655

Pubmed Central ID

  • 18352655

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.100.086809


  • eng