Half metallicty in finite-length zigzag single walled carbon nanotube: A firs…

We predict here from first-principle calculations that finite-length
n,0 single walled carbon nanotubes
SWCNTs with H-termination at the open ends displaying antiferromagnetic coupling when n is greater than 6. An opposite local gating effect of the spin states, i.e., half metallicity, is found under the influence of an external electric field along the direction of tube axis. Remarkably…