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基于石墨平面π电子的紧束缚模型 ,导出了手性 (chiral)环状碳纳米管 (TCNTs)在磁场中的电子结构 ,从而对TCNTs量子特性和磁化规律进行了较深入研究 .第Ⅰ ,Ⅱ类TCNTs在磁场中存在金属—半导体的连续转变 .计算分析表明 :在T =0K时 ,第Ⅰ ,Ⅱ类TCNTs的磁化强度随磁通量Φ呈线性周期性变化 (以磁通量子Φ0 =h e为周期 ) ,并且磁化强度对手性角θ、管口半径r,以及温度T极为敏感 ,但与环半径R无关 .手性TCNTs的磁化强度比椅形或锯齿形TCNTs的磁化强度强很多 ;而第Ⅲ类TCNTs的磁化强度极弱 ,且无规律 .
The electronic structure of the chiral ring-like carbon nanotubes (TCNTs) in the magnetic field was derived based on the tight-binding model of the π-electron on the graphite plane, and the quantum properties and magnetization of the TCNTs were studied in more depth.Ⅰ, Ⅱ The results show that there is a linear periodic change in the magnetization of TCNTs of type I and type II with the flux Φ at T = 0K (the period of flux Φ0 = he) , And the magnetization is extremely sensitive to the chiral angle θ, nozzle radius r and temperature T, but not to the ring radius R. The magnetization of chiral TCNTs is much stronger than that of chair-shaped or zig-zag TCNTs. The magnetization of TCNTs is very weak and irregular.