The effect of the electron-phonon coupling on the thermal conductivity of silicon nanowires
文献类型：期刊论文
| 作者 | Wan, WH ; Xiong, BG ; Zhang, WX ; Feng, J ; Wang, EG |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2012 |
| 卷号 | 24期号:29 |
| 关键词 | SEMICONDUCTOR NANOWIRE DEPENDENCE MODES |
| ISSN号 | 0953-8984 |
| 通讯作者 | Wan, WH (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | The thermal conductivity of free-standing silicon nanowires (SiNWs) with diameters from 1-3 nm has been studied by using the one-dimensional Boltzmann's transport equation. Our model explicitly accounts for the Umklapp scattering process and electron-phonon coupling effects in the calculation of the phonon scattering rates. The role of the electron-phonon coupling in the heat transport is relatively small for large silicon nanowires. It is found that the effect of the electron-phonon coupling on the thermal conduction is enhanced as the diameter of the silicon nanowires decreases. Electrons in the conduction band scatter low-energy phonons effectively where surface modes dominate, resulting in a smaller thermal conductivity. Neglecting the electron-phonon coupling leads to overestimation of the thermal transport for ultra-thin SiNWs. The detailed study of the phonon density of states from the surface atoms and central atoms shows a better understanding of the nontrivial size dependence of the heat transport in silicon nanowire. |
| 收录类别 | SCI |
| 资助信息 | National Science Foundation of China (NSFC) [10974238, 91021007, 11174009]; MOST [2009DFA01290] |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/45070]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wan, WH,Xiong, BG,Zhang, WX,et al. The effect of the electron-phonon coupling on the thermal conductivity of silicon nanowires[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2012,24(29). |
| APA | Wan, WH,Xiong, BG,Zhang, WX,Feng, J,&Wang, EG.(2012).The effect of the electron-phonon coupling on the thermal conductivity of silicon nanowires.JOURNAL OF PHYSICS-CONDENSED MATTER,24(29). |
| MLA | Wan, WH,et al."The effect of the electron-phonon coupling on the thermal conductivity of silicon nanowires".JOURNAL OF PHYSICS-CONDENSED MATTER 24.29(2012). |
入库方式： OAI收割
来源：物理研究所
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