Universal features of quantized thermal conductance of carbon nanotubes.
Universal features of quantized thermal conductance of carbon nanotubes.
复制标题
DOI：
10.1103/physrevlett.92.075502
复制
发表时间：
2003-12
影响因子：
8.6
通讯作者：
Takahiro Yamamoto;Satoshi Watanabe;Kazuyuki Watanabe
中科院分区：
文献类型：
--
作者：
Takahiro Yamamoto;Satoshi Watanabe;Kazuyuki Watanabe
基于朗道热输运理论，通过理论分析，揭示了碳纳米管量子化热导的普遍特征。半导体碳纳米管的声子衍生的热导表现出普遍的量子化在低温极限，独立的半径或原子的几何形状。的温度依赖性遵循一个单一的曲线给出的温度标度的声子能隙。金属碳纳米管的热导率有一个额外的贡献，从电子状态，这也表现出量子化的行为，直到室温。
The universal features of quantized thermal conductance of carbon nanotubes (CNTs) are revealed through a theoretical analysis based on the Landauer theory of heat transport. The phonon-derived thermal conductance of semiconducting CNTs exhibits a universal quantization in the low-temperature limit, independent of the radius or atomic geometry. The temperature dependence follows a single curve given in terms of temperature scaled by the phonon energy gap. The thermal conductance of metallic CNTs has an additional contribution from electronic states, which also exhibits quantized behavior up to room temperature.