Superconductivity in carbon nanotubes coupled to transition metal atoms
Department of Physics,
UAE University P.O. Box 17551, Al-Ain, United Arab Emirates
2 National Research Council - Ottawa, Canada, K1A 0R6
Accepted: 6 March 2003
The electronic structures of zigzag and armchair single-walled carbon nanotubes interacting with a transitional-metal atomic nanowire of have been determined. The 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 –50. The signs of superconductivity seen in “ropes” of nanotubes may also be related to the effect of intrinsic transition metal impurities.
PACS: 74.20.-z – Theories and models of superconducting state / 61.48.+c – Fullerenes and fullerene-related materials / 61.50.Ah – Theory of crystal structure, crystal symmetry; calculations and modeling
© EDP Sciences, 2003