Intra-atomic correlation effects and the electronic and magnetic properties in nanotubes

The Gutzwiller method has been applied to investigate the intra-atomic correlation in the pi-band of tubule B(0,1)n versus the number of hexagons on the circumference n. The consequences of the correlation on the electronic (gap) and magnetic (susceptibility) properties have been examined. The critical on-site correlation term U to obtain ferromagnetism or antiferromagnetism has been derived with respect to n. The transition from a paramagnetic to a diamagnetic magnetization obtained by Davids, Wang, Saxena, and Bishop has been studied within the present framework.