Presence of perfectly conducting channel in metallic carbon nanotubes
Presence of perfectly conducting channel in metallic carbon nanotubes
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DOI：
10.1143/jpsj.71.2753
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发表时间：
2002-11-01
影响因子：
1.7
通讯作者：
Suzuura, H
中科院分区：
文献类型：
--
作者：
Ando, T;Suzuura, H
证明了在金属碳纳米管中，当散射体的电势范围大于晶格常数时，存在一个与能量无关的无背散射的传导通道。在存在多个行进通道的情况下，当长度超过由玻尔兹曼输运方程确定的平均自由程时，电导从由行进模式的数量确定的理想值减小到单通道值。此外，非弹性散射使得电导与长度的倒数成比例地减小，与玻尔兹曼结果定性一致。
It is proved that a conducting channel transmitting perfectly without backscattering is present independent of energy in metallic carbon nanotubes for scatterers with potential range larger than the lattice constant. In the case that several traveling channels are present, the conductance decreases from the ideal value determined by the number of traveling modes to the single-channel value when the length exceeds the mean free path determined by a Boltzmann transport equation. Further, inelastic scattering makes the conductance decrease in proportion to the inverse of the length in qualitative agreement with the Boltzmann result.