Encapsulated nanowires: Boosting electronic transport in carbon nanotubes
Encapsulated nanowires: Boosting electronic transport in carbon nanotubes
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DOI：
10.1103/physrevb.95.121408
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发表时间：
2017-03-27
影响因子：
3.7
通讯作者：
Quigley, David
中科院分区：
文献类型：
--
作者：
Vasylenko, Andrij;Wynn, Jamie;Quigley, David
由于大量光学声子的散射，金属碳纳米管 (CNT) 的电导率相对于偏置电压迅速饱和。原始碳纳米管中这些主要散射体的衰减太慢，无法抵消高偏压下增加的生成速率。我们从第一原理证明，将一维原子链封装在单壁碳纳米管内可以通过提供额外的热化通道来增强“热”声子的衰变。对于具有封装铍的示例系统，声子数量增长的平息将金属碳纳米管的电阻率降低了 51%。
The electrical conductivity of metallic carbon nanotubes (CNTs) quickly saturates with respect to bias voltage due to scattering from a large population of optical phonons. The decay of these dominant scatterers in pristine CNTs is too slow to offset an increased generation rate at high voltage bias. We demonstrate from first principles that encapsulation of one-dimensional atomic chains within a single-walled CNT can enhance the decay of "hot" phonons by providing additional channels for thermalization. Pacification of the phonon population growth reduces the electrical resistivity of metallic CNTs by 51% for an example system with encapsulated beryllium.