Nature Communications (Jan 2017)
Investigation of phonon coherence and backscattering using silicon nanomeshes
Abstract
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.