Abstract:Based on the toroidal carbon nanoscrolls tight-binding model, the expressions of persistent currents are derived, and the effects of geometric structure, separation energy level, temperature and Zeeman effect on persistent current are systematically studied. The results show that the persistent current in the toroidal carbon nanoscrolls is only 10-7 A, and as the circumference of the coil increases, the persistent current will gradually decrease. The states near the Fermi level carries almost all of the persistent current, while the far-off states contribute very little. As the temperature increases, the persistent current decreases sharply, and the larger the coil, the faster the persistent currents vanish. Considering the Zeeman effect, the persistent current appears new jump structures and the periodic structure is destroyed for larger Φ.