Gate-controlled superconductivity in diffusive multiwalled carbon nanotube
超导电性
2015-06-25 v1
摘要
We have investigated electrical transport in a diffusive multiwalled carbon nanotube contacted using superconducting leads made of Al/Ti sandwich structure. We find proximity-induced superconductivity with measured critical currents up to I_cm = 1.3 nA, tunable by gate voltage down to 10 pA. The supercurrent branch displays a finite zero bias resistance which varies as R_0 proportional to I_cm^-alpha with alpha=0.74. Using IV-characteristics of junctions with phase diffusion, a good agreement is obtained with Josephson coupling energy in the long, diffusive junction model of A.D Zaikin and G.F. Zharkov (Sov. J. Low Temp. Phys. 7, 184 (1981)).
引用
@article{arxiv.cond-mat/0608479,
title = {Gate-controlled superconductivity in diffusive multiwalled carbon nanotube},
author = {T. Tsuneta and L. Lechner and P. J. Hakonen},
journal= {arXiv preprint arXiv:cond-mat/0608479},
year = {2015}
}
备注
5 pages, 4 figures