论文部分内容阅读
In this paper the persistent currents of ideal toroidal single-wall carbon nanotubes (TSWNTs) arecalculated from the tight-binding model and the periodic boundary conditions. The electronic structure and persistent current of a TSWNT strongly depend on its helicity and longitudinal circumference, making the TSWNTs a geometry-sensitive kind of materials. The interatomic carbonic interactions other than PP-type are also studied and are found to introduce more stepsto the persistent current. The diamagnetic-paramagnetic transitions occur more frequently, and the persistent current depends on the interaction energy values. while the periodicity of magnetic flux preserves.
In this paper the persistent currents of ideal toroidal single-wall carbon nanotubes (TSWNTs) arecalculated from the tight-binding model and the periodic boundary conditions. The electronic structure and persistent current of a TSWNT strongly depend on its helicity and longitudinal circumference, making the TSWNTs a geometry-sensitive kind of materials. The interatomic carbonic interactions other than PP-type are also studied and are found to introduce more stepsto the persistent current. The diamagnetic-paramagnetic transitions occur more frequently, and the persistent current depends on the interaction energy values. while the periodicity of magnetic flux preserves.