Density functional study on transition-metal-coated single-walled carbon nanotubes

A density functional study on transition-metal-coated single-walled carbon nanotubes shows that there are both magnetic and nonmagnetic materials, depending on the nature of the transition metals and their adsorption sites. Adsorption of transition metal atoms to a nanotube is energetically favorable. It is found that some of the magnetic materials exhibit large magnetic moments and high spin polarizations, whereas nonmagnetic materials can display high superconducting transition temperatures.