Quantum suppression of superconductivity in ultrathin nanowires

Details Quantum suppression of superconductivity in ultrathin nanowires Quantum suppression of superconductivity in ultrathin nanowires

2000-03-13

arxiv.org/abs/cond-mat/0003198v1

Physics

Condensed Matter

Superconductivity

14 pages, 3 figures. Accepted for publication in Nature

Scientific paper

We report measurements on ultrathin (<10 nm) nanowires produced by coating carbon nanotubes with a superconducting amorphous MoGe alloy. We find that nanowires can be superconducting or insulating depending on their normal state resistance $R_{N}$ compared to $R_{q}=h/(2e)^{2}$ -- the quantum resistance for Cooper pairs. If $R_{N}< R_{q}$ the tunneling of quantum phase slips (QPS) is prohibited due to strong damping, and so the wires stay superconducting. The insulating state, observed if $R_{N}> R_{q}$, is explained in terms of proliferation of quantum phase slips and corresponding localization of Cooper pairs. The observed superconductor-insulator transition is analogous to the dissipative phase transition which takes place in Josephson Junctions at $R_{N}= R_{q}$ (Penttila et al., Phys. Rev. Lett. Vol.82, p.1004, 1999)

Affiliated with

Also associated with

No associations

Rating

Quantum suppression of superconductivity in ultrathin nanowires does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum suppression of superconductivity in ultrathin nanowires, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum suppression of superconductivity in ultrathin nanowires will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-459487