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, ‡}

(a) Power spectrum density of exponential surface and Gaussian surface. (b) Rough surface profiles generated from exponential and Gaussian ACFs.