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Title: Phonon coherent resonance and its effect on thermal transport in core-shell nanowires
Authors: Chen, J.
Zhang, G.
Li, B. 
Issue Date: 14-Sep-2011
Citation: Chen, J., Zhang, G., Li, B. (2011-09-14). Phonon coherent resonance and its effect on thermal transport in core-shell nanowires. Journal of Chemical Physics 135 (10) : -. ScholarBank@NUS Repository.
Abstract: We study heat current autocorrelation function and thermal conductivity in core-shell nanowires by using molecular dynamics simulations. Interestingly, a remarkable oscillation effect in heat current autocorrelation function is observed in core-shell NWs, while the same effect is absent in pure silicon nanowires, nanotube structures, and random doped nanowires. Detailed characterizations of the oscillation signal reveal that this intriguing oscillation is caused by the coherent resonance effect of the transverse and longitudinal phonon modes. This phonon resonance results in the localization of the longitudinal modes, which leads to the reduction of thermal conductivity in core-shell nanowires. Our study reveals that a coherent mechanism can be used to tune thermal conductivity in core-shell nanowires. © 2011 American Institute of Physics.
Source Title: Journal of Chemical Physics
ISSN: 00219606
DOI: 10.1063/1.3637044
Appears in Collections:Staff Publications

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