Meissner effect in honeycomb arrays of multi-walled carbon nanotubes

Details Meissner effect in honeycomb arrays of multi-walled carbon nanotubes Meissner effect in honeycomb arrays of multi-walled carbon nanotubes

2007-03-23

arxiv.org/abs/cond-mat/0703599v1

Physics

Condensed Matter

Superconductivity

6 pages

Scientific paper

10.1103/PhysRevB.76.245424

We report Meissner effect for type-II superconductors with a maximum Tc of 19 K, which is the highest value among those in new-carbon related superconductors, found in the honeycomb arrays of multi-walled CNTs (MWNTs). Drastic reduction of ferromagnetic catalyst and efficient growth of MWNTs by deoxidization of catalyst make the finding possible. The weak magnetic anisotropy, superconductive coherence length (- 7 nm), and disappearance of the Meissner effect after dissolving array structure indicate that the graphite structure of an MWNT and those intertube coupling in the honeycomb array are dominant factors for the mechanism.

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