Observation of unitary conductance for resonant tunneling with dissipation

Conference Paper

We investigate tunneling through a resonant level formed in a carbon nanotube quantum dot contacted by resistive metal wires. These contacts create a dissipative environment for the electrons tunneling across the nanotube, thus suppressing the tunneling rate. We study the shape of the resonant peak in the nanotube conductance, with the expectation that the peak width and height, both dependent on the tunneling rate, will be suppressed. Instead, we find that the behavior crucially depends on the ratio of the tunneling rates from the resonant level to the two contacts. We discuss the implication of our findings for a boundary quantum phase transition in this system. © Published under licence by IOP Publishing Ltd.

Full Text

Duke Authors

Cited Authors

  • Mebrahtu, H; Borzenets, I; Bomze, Y; Finkelstein, G

Published Date

  • January 1, 2012

Published In

Volume / Issue

  • 400 / PART 4

Electronic International Standard Serial Number (EISSN)

  • 1742-6596

International Standard Serial Number (ISSN)

  • 1742-6588

Digital Object Identifier (DOI)

  • 10.1088/1742-6596/400/4/042007

Citation Source

  • Scopus