Phonon-Assisted Intertube Electronic Transport in an Armchair Carbon Nanotube Film
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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.
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Adinehloo, Davoud, Gao, Weilu, Mojibpour, Ali, et al.. "Phonon-Assisted Intertube Electronic Transport in an Armchair Carbon Nanotube Film." Physical Review Letters, 130, no. 17 (2023) American Physical Society: https://doi.org/10.1103/PhysRevLett.130.176303.