Ultra-low thermal conductivity of roughened silicon nanowires: Role of phonon-surface bond order imperfection scattering

Yang Heng-Yu^{1, 2}, Chen Ya-Li³, Zhou Wu-Xing^{1, 2}, Xie Guo-Feng^{1, 2, †}, Xu Ning^{4, 2, ‡}

Thermal conductivity as a function of parameters (a) diameter, (b) rms of roughness, (c) correlation length of roughness, and (d) surface-to-volume ratio.