Heng-Yu Yang, Ya-Li Chen, Wu-Xing Zhou, Guo-Feng Xie, Ning Xu. Ultra-low thermal conductivity of roughened silicon nanowires: Role of phonon-surface bond order imperfection scattering[J]. Chinese Physics B, 2020, 29(8):
- Chinese Physics B
- Vol. 29, Issue 8, (2020)
Fig. 1. Schematic illustration of surface roughness profile of SiNWs, where x is the longitudinal axis of the nanowires.
![Thermal conductivity of smooth and roughened SiNWs at different temperature. The solid lines present our calculations. The symbols represent experimental measurements from Ref. [40].](/richHtml/cpb/2020/29/8/086502/img_2.jpg)
Fig. 2. Thermal conductivity of smooth and roughened SiNWs at different temperature. The solid lines present our calculations. The symbols represent experimental measurements from Ref. [40 ].
Fig. 3. Phonon scattering rates in smooth SiNW (a) and roughened SiNW (b) as functions of phonon angular frequency.
Fig. 4. Contour plots of thermal conductivity as a function of δ and ξ for exponential (a) and Gaussian (b) correlation surfaces.
Fig. 5. (a) Power spectrum density of exponential surface and Gaussian surface. (b) Rough surface profiles generated from exponential and Gaussian ACFs.
Fig. 6. Thermal conductivity as a function of parameters (a) diameter, (b) rms of roughness, (c) correlation length of roughness, and (d) surface-to-volume ratio.
|
Table 1. Parameters in calculation of thermal conductivity of SiNWs.
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20