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, ‡}

Phonon scattering rates in smooth SiNW (a) and roughened SiNW (b) as functions of phonon angular frequency.