Crossover from ballistic to diffusive thermal conductance in helically coiled carbon nanotubes(Article)
- Faculty of Physics, NanoLab, University of Belgrade, Studentski trg 12, Belgrade, 11001, Serbia
Abstract
Thermal conductance in helically coiled carbon nanotubes (HCCNTs) is calculated out of phonon dispersion relations: anharmonicity is included through Brenner interatomic potential and scattering rates of the three-phonon Umklapp processes are calculated exactly, for all allowed transport channels. Highlighted are the universal features of the quantized thermal conductance and crossover from the ballistic to the diffusive transport regime is studied in detail. Correlation between the geometrical parameters of HCCNTs and thermal conductance is investigated. Finally, the specific heat is calculated and compared to that of the other carbon materials. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Indexed keywords
| Engineering controlled terms: | BallisticsCarbon nanotubesGeometryPhononsSpecific heat |
|---|---|
| Engineering uncontrolled terms | Ballistic transportsBrenner interatomic potentialsDiffusive transportDiffusive transport regimePhonon dispersion relationsQuantized thermal conductanceThermal conductanceThree-phonon Umklapp process |
| Engineering main heading: | Thermal conductivity |
- ISSN: 03701972
- Source Type: Journal
- Original language: English
- DOI: 10.1002/pssb.201451170
- Document Type: Article
- Publisher: Wiley-VCH Verlag
Popović, Z.P.; Faculty of Physics, NanoLab, University of Belgrade, Studentski trg 12, Belgrade, Serbia
© Copyright 2020 Elsevier B.V., All rights reserved.
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