Phonon-Assisted Intertube Electronic Transport in an Armchair Carbon Nanotube Film
Phonon-Assisted Intertube Electronic Transport in an Armchair Carbon Nanotube Film
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扶手椅碳纳米管薄膜中声子辅助管间电子传输
DOI：
10.1103/physrevlett.130.176303
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发表时间：
2023
影响因子：
8.6
通讯作者：
Perebeinos, Vasili
中科院分区：
文献类型：
--
作者：
Adinehloo, Davoud;Gao, Weilu;Mojibpour, Ali;Kono, Junichiro;Perebeinos, Vasili
纳米材料宏观组装体的电导率是通过组成纳米物体内部和之间的电子传输的复杂相互作用来确定的。声子在这种情况下发挥双重作用：它们的数量增加往往会通过电子散射来降低电导率，同时它们可以通过帮助电子在势能景观中传播来提高电导率。我们在扶手椅单壁碳纳米管的宏观薄膜上进行温度依赖性电导率测量，确定了相邻纳米管之间的声子辅助相干电子传输过程。通过电子态的原子建模以及电子和声子辅助结电导的计算，我们得出结论，声子辅助电导是在扶手椅碳纳米管中观察到的高温输运的主要机制。相干管间动力学的明确表现证明单手性扶手椅纳米管薄膜是一种独特的宏观固态纳米物体整体，有望用于室温相干电子器件的开发。
The electrical conductivity of a macroscopic assembly of nanomaterials is determined through a complex interplay of electronic transport within and between constituent nano-objects. Phonons play dual roles in this situation: their increased populations tend to reduce the conductivity via electron scattering, while they can boost the conductivity by assisting electrons to propagate through the potential-energy landscape. We identified a phonon-assisted coherent electron transport process between neighboring nanotubes in temperature-dependent conductivity measurements on a macroscopic film of armchair single-wall carbon nanotubes. Through atomistic modeling of electronic states and calculations of both electronic and phonon-assisted junction conductances, we conclude that phonon-assisted conductance is the dominant mechanism for observed high-temperature transport in armchair carbon nanotubes. The unambiguous manifestation of coherent intertube dynamics proves a single-chirality armchair nanotube film to be a unique macroscopic solid-state ensemble of nano-objects promising for the development of room-temperature coherent electronic devices.