Journal
APPLIED PHYSICS LETTERS
Volume 83, Issue 3, Pages 512-514Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1592313
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Continuous Nb wires, 7-15 nm in diameter, have been fabricated by sputter-coating single fluorinated carbon nanotubes. Transmission electron microscopy revealed that the wires are polycrystalline, having grain sizes of about 5 nm. The critical current of wires thicker than similar to12 nm is very high (10(7) A/cm(2)) and comparable to the expected depairing current. The resistance versus temperature curves measured down to 0.3 K are well described by the Langer-Ambegaokar-McCumber-Halperin theory of thermally activated phase slips. Quantum phase slips are suppressed. (C) 2003 American Institute of Physics.
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