Ultrahigh convergent thermal conductivity of carbon nanotubes from comprehensive atomistic modeling
| Autor: | Davide Donadio, Zheyong Fan, Zekun Chen, Haikuan Dong, Giuseppe Barbalinardo |
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| Přispěvatelé: | University of California Davis, Department of Applied Physics, Centre of Excellence in Quantum Technology, QTF, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2021 |
| Předmět: |
General Physics
Materials science Statistical Mechanics (cond-mat.stat-mech) Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Scattering Phonon Mean free path Nanowire FOS: Physical sciences General Physics and Astronomy Carbon nanotube Mathematical Sciences law.invention Molecular dynamics Engineering Thermal conductivity law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physical Sciences Thermal cond-mat.mes-hall cond-mat.stat-mech Condensed Matter - Statistical Mechanics |
| Zdroj: | Physical review letters, vol 127, iss 2 |
| Popis: | Anomalous heat transport in one-dimensional nanostructures, such as nanotubes and nanowires, is a widely debated problem in condensed matter and statistical physics, with contradicting pieces of evidence from experiments and simulations. Using a comprehensive modeling approach, comprised of lattice dynamics and molecular dynamics simulations, we proved that the infinite length limit of the thermal conductivity of a (10,0) single-wall carbon nanotube is finite but this limit is reached only for macroscopic lengths due to thermal phonon mean free path of several millimeters. Our calculations showed that the extremely high thermal conductivity of this system at room temperature is dictated by quantum effects. Modal analysis showed that the divergent nature of thermal conductivity, observed in one-dimensional model systems, is suppressed in carbon nanotubes by anharmonic scattering channels provided by the flexural and optical modes with polarization in the plane orthogonal to the transport direction. 7 pages, 4 figures |
| Databáze: | OpenAIRE |
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