单壁碳纳米管环离散谱和连续谱间的转变

考虑卷曲效应，构造了扶手形单壁碳纳米管环的单Π轨道紧束缚模型.利用波函数分解方法导出了原子间相互作用矩阵元，由此研究了扶手形碳纳米管环的电子性质.随环半径改变，观察到电子结构发生从离散谱到连续谱之间的转变.计算也表明随管半径改变，其能谱也有类似的变化.关键词：碳纳米管环卷曲效应电子结构

Discrete-continuous spectral transition in single wall toroidal carbon nanotubes

Taken into account the curvature effects，we build a single π orbital tight-bi ndi ng model for armchair toroidal carbon nanotubes, from which the interaction matr i x elements have been derived by means of the wavefunction decomposition method. The electronic structures of armchair toroidal carbon nanotubes are studied, whi ch are dependent on both the torus radius and the tube radius. The energy spectr al transition is observed from the discrete to continuous ones, as the t orus radius and the tube radius are varied.