Superconductivity in Ropes of Single-Walled Carbon Nanotubes
M. Kociak, A. Yu. Kasumov, S. Guéron, B. Reulet, I. I. Khodos, Yu. B. Gorbatov, V. T. Volkov, L. Vaccarini, H. Bouchiat
DOI 10.1103/PhysRevLett.86.2416 · Physical Review Letters
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Abstract
We report measurements on ropes of single-walled carbon nanotubes (SWNT) in low-resistance contact to nonsuperconducting (normal) metallic pads, at low voltage and at temperatures down to 70 mK. In one sample, we find a 2 orders of magnitude resistance drop below 0.55 K, which is destroyed by a magnetic field of the order of 1 T, or by a dc current greater than 2.5μA. These features strongly suggest the existence of superconductivity in ropes of SWNT.
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