On the phononic bandgap of carbon nanotubes
On the phononic bandgap of carbon nanotubes
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DOI：
10.1155/2013/525070
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发表时间：
2013
影响因子：
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通讯作者：
Kohei Yamamoto;H. Ishii;N. Kobayashi;K. Hirose
中科院分区：
文献类型：
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作者：
Kohei Yamamoto;H. Ishii;N. Kobayashi;K. Hirose
在碳纳米管的声子带隙方面，我们给出了碳纳米管的声子带隙的手性以及它与碳纳米管直径的关系。我们发现，虽然规则的碳纳米管的声子带隙是相同的电子结构的情况下，直径的依赖性是不同的。由于石墨烯声子带在K点附近的各向异性，石墨烯碳纳米管的声子带隙表现出“三种”直径依赖性。我们还展示了声子带隙中从一维到二维的交叉特性。
On the phononic bandgap of carbon nanotubes (CNTs), we show in what chirality CNTs have phononic bandgaps and its dependence on the diameters of CNTs. We find that, though the rule where CNTs have phononic bandgaps is the same as in the electronic structure case, the diameter dependence is different. The phononic bandgaps of the zigzag-CNTs reveal "three" kinds of diameter dependence due to the anisotropy of graphene phonon band around the K point in k-space. We also show the crossover from one- to two-dimensional characteristics in phononic bandgaps.