Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.83.045408
Title: Anomalous thermal transport in disordered harmonic chains and carbon nanotubes
Authors: Ni, X.
Leek, M.L.
Wang, J.-S. 
Feng, Y.P. 
Li, B. 
Issue Date: 21-Jan-2011
Citation: Ni, X., Leek, M.L., Wang, J.-S., Feng, Y.P., Li, B. (2011-01-21). Anomalous thermal transport in disordered harmonic chains and carbon nanotubes. Physical Review B - Condensed Matter and Materials Physics 83 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.83.045408
Abstract: We report the coherent potential approximation method of treating quantum thermal transport properties of nanoscale systems with mass disorder. Instead of massive efforts required in brute-force calculations, configuration averaging of disordered systems can be efficiently handled in a self-consistent manner by setting up the phonon version of nonequilibrium vertex correction theory. The accuracy of the method is verified by comparing with the exact results and Monte Carlo experiments in one-dimensional atomic chains. Results obtained for disordered harmonic chains and carbon nanotubes provide evidence of anomalous thermal transport in such systems. We also observe crossover in the transport where phonon scattering by disorder becomes important. Our results show that disorder plays a role in thermal conductance reduction. © 2011 American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/95806
ISSN: 10980121
DOI: 10.1103/PhysRevB.83.045408
Appears in Collections:Staff Publications

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