J Mater Sci Technol ›› 1999, Vol. 15 ›› Issue (04): 342-344.

• Research Articles • Previous Articles     Next Articles

Persistent Currents in Toroidal Single-wall Carbon Nanotubes

Junjie LIU, Gang ZHANG, Binglin GU   

  1. Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:1999-01-15 Revised:1999-03-16 Online:1999-07-28 Published:2009-10-10
  • Contact: Junjie LIU

Abstract: In this paper the persistent currents of ideal toroidal single-wall carbon nanotubes (TSWNTs) are calculated 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 longitudinalcircumference, making the TSWNTs a geometry-sensitive kind of materials. The interatomic carbonic interactions other than ppp-type are also studied and are found to introduce more steps to 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.

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