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Gate-controlled superconductivity in a diffusive multiwalled carbon nanotube
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors
Tsuneta, T.
Lechner, L.
Hakonen, P. J.
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en
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4
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Physical Review Letters, Volume 98, issue 8, pp. 1-4
Abstract
We have investigated electrical transport in a diffusive multiwalled carbon nanotube contacted using superconducting leads made of an Al/Ti sandwich structure. We find proximity-induced superconductivity with measured critical currents up to Icm=1.3 nA, tunable by the gate voltage down to 10 pA. The supercurrent branch displays a finite zero bias resistance which varies as R0∝I−αcm with α=0.74. Using IV characteristics of junctions with phase diffusion, a good agreement is obtained with the 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)].
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Tsuneta, T, Lechner, L & Hakonen, P J 2007, 'Gate-controlled superconductivity in a diffusive multiwalled carbon nanotube', Physical Review Letters, vol. 98, no. 8, 087002, pp. 1-4. https://doi.org/10.1103/PhysRevLett.98.087002