Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep01143
Title: Reduction of thermal conductivity by nanoscale 3D phononic crystal
Authors: Yang, L.
Yang, N.
Li, B. 
Issue Date: 2013
Source: Yang, L., Yang, N., Li, B. (2013). Reduction of thermal conductivity by nanoscale 3D phononic crystal. Scientific Reports 3 : -. ScholarBank@NUS Repository. https://doi.org/10.1038/srep01143
Abstract: We studied how the period length and the mass ratio affect the thermal conductivity of isotopic nanoscale three-dimensional (3D) phononic crystal of Si. Simulation results by equilibrium molecular dynamics show isotopic nanoscale 3D phononic crystals can significantly reduce the thermal conductivity of bulk Si at high temperature (1000â.K), which leads to a larger ZT than unity. The thermal conductivity decreases as the period length and mass ratio increases. The phonon dispersion curves show an obvious decrease of group velocities in 3D phononic crystals. The phonon's localization and band gap is also clearly observed in spectra of normalized inverse participation ratio in nanoscale 3D phononic crystal.
Source Title: Scientific Reports
URI: http://scholarbank.nus.edu.sg/handle/10635/97784
ISSN: 20452322
DOI: 10.1038/srep01143
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