Tuning the electrical conductivity of nanotube-encapsulated metallocene   wires
  We analyze a new family of carbon nanotube-based molecular wires, formed by encapsulating metallocene molecules inside the nanotubes. Our simulations, that are based on a combination of non-equilibrium Green function techniques and density functional theory, indicate that these wires can be engineered to exhibit desirable magnetotransport effects for use in spintronics devices. The proposed structures should also be resilient to room-temperature fluctuations, and are expected to have a high yield. 
V. M. Garcia-Suarez, J. Ferrer and C. J. Lambert