Superconductivity in carbon nanotubes coupled to transition metal atoms

Details Superconductivity in carbon nanotubes coupled to transition metal atoms Superconductivity in carbon nanotubes coupled to transition metal atoms

2002-08-19

arxiv.org/abs/cond-mat/0208365v1

Physics

Condensed Matter

Superconductivity

4 pages and two figures

Scientific paper

10.1209/epl/i2003-00410-4

The electronic structures of zig-zag and arm-chair single-walled carbon nanotubes interacting with a transitional-metal atomic nanowire of Ni have been determined. The Ni nanowire creates a large electron density of states (DOS)at the Fermi energy. The dependence of the enhanced DOS on the spin state and positioning of the transition-metal wire(inside or outside the nanotube) is studied. Preliminary estimates of the electron-phonon interaction suggest that such systems may have a superconducting transition temperature of $\sim$ 10-50 K. The signs of superconductivity seen in ``ropes'' of nanotubes may also be related to the effect of intrinsic transition-metal impurities.

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