Conductance properties of nanotubes coupled to superconducting leads: signatures of Andreev states dynamics
arXiv:cond-mat/0406240 · doi:10.1016/j.ssc.2004.05.031
Abstract
We present a combined experimental and theoretical analysis of the low bias conductance properties of carbon nanotubes coupled to superconducting leads. In the Kondo regime the conductance exhibits a zero bias peak which can be several times larger than the unitary limit in the normal case. This zero bias peak can be understood by analyzing the dynamics of the subgap Andreev states under an applied bias voltage. It is shown that the existence of a linear regime is linked to the presence of a finite relaxation rate within the system. The theory provides a good fitting of the experimental results.
arXiv comment6 revtex4 pages, 6 figures, to appear in SSC
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- Gate-controlled superconductivity in diffusive multiwalled carbon nanotube
- Subgap features due to quasiparticle tunneling in quantum dots coupled to superconducting leads
- A particle conserving approach to AC-DC driven interacting quantum dots with superconducting leads
- Collapse of the Josephson emission in a carbon nanotube junction in the Kondo regime
- Wideband superconducting nanotube electrometer