Nature Communications (Jan 2017)

Investigation of phonon coherence and backscattering using silicon nanomeshes

  • Jaeho Lee,
  • Woochul Lee,
  • Geoff Wehmeyer,
  • Scott Dhuey,
  • Deirdre L. Olynick,
  • Stefano Cabrini,
  • Chris Dames,
  • Jeffrey J. Urban,
  • Peidong Yang

DOI
https://doi.org/10.1038/ncomms14054
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 8

Abstract

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Low thermal conductivities in nanomeshes have been attributed to both wave-like and particle-like behaviour of phonons. Here, the authors use periodicity-controlled silicon nanomeshes to show that the particle backscattering effect dominates for periodicities above 100 nm and temperatures above 14 K.