Superconductivity in ropes of single-walled carbon nanotubes.
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 2.5 microA. These features strongly suggest the existence of superconductivity in ropes of SWNT.
Kociak
M
M
Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Orsay, France.
Kasumov
A Y
AY
Guéron
S
S
Reulet
B
B
Khodos
I I
II
Gorbatov
Y B
YB
Volkov
V T
VT
Vaccarini
L
L
Bouchiat
H
H