Electronic and transport properties of single-wall carbon nanotubes encapsulating fullerene-based structures
Electronic and transport properties of single-wall carbon nanotubes encapsulating fullerene-based structures
复制标题
封装富勒烯结构的单壁碳纳米管的电子和传输特性
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
K. Chang
中科院分区：
文献类型：
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作者：
Dong;H. Sim;K. Chang
我们通过使用紧束缚模型研究了包含有限尺寸的带帽 (5,5) 管（胶囊）和 ${mathrm{C}}_{60}$ 富勒烯长链的 (10,10) 碳纳米管的电子和传输特性。我们发现通过外管的总透射率对混合管的对称性非常敏感。对于 (5,5) 胶囊对齐以保持镜像对称的 (10,10) 管，总透射率表现出与对称线形状的反共振，而打破镜像对称性会导致不对称线形状。对于 (10,10) 管中封装的富勒烯，我们发现了丰富的传输结构，例如反共振、共振和传输间隙，这些结构取决于镜像对称性和旋转对称性。这一特征归因于入射通道与内部结构的束缚态的耦合是由混合管的对称性决定的。
We investigate the electronic and transport properties of (10,10) carbon nanotubes that contain a finite-sized capped (5,5) tube (capsule) and a long chain of ${mathrm{C}}_{60}$ fullerenes by using the tight-binding model. We find that the total transmissions through the outer tubes are very sensitive to the symmetry of the hybrid tubes. For the (10,10) tube where the (5,5) capsule is aligned so as to maintain mirror symmetries, the total transmission exhibits antiresonances with symmetric line shapes, while breaking mirror symmetries leads to asymmetric line shapes. For encapsulated fullerenes in the (10,10) tube, we find rich structures in transmission, such as antiresonances, resonances, and transmission gaps, which depend on mirror and rotational symmetries. This feature is attributed to the fact that the coupling of incident channels with the bound states of the inner structures is determined by the symmetry of the hybrid tubes.