Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor
文献类型：期刊论文
| 作者 | Qi, Ji; Dong, Baojuan; Zhang, Zhe; Zhang, Zhao; Chen, Yanna; Zhang, Qiang; Danilkin, Sergey; Chen, Xi; He, Jiaming; Fu, Liangwei |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2020-10-15 |
| 卷号 | 11期号:1 |
| DOI | 10.1038/s41467-020-19044-w |
| 英文摘要 | A solid with larger sound speeds usually exhibits higher lattice thermal conductivity. Here, we report an exception that CuP2 has a quite large mean sound speed of 4155ms(-1), comparable to GaAs, but single crystals show very low lattice thermal conductivity of about 4Wm(-1) K-1 at room temperature, one order of magnitude smaller than GaAs. To understand such a puzzling thermal transport behavior, we have thoroughly investigated the atomic structures and lattice dynamics by combining neutron scattering techniques with first-principles simulations. This compound crystallizes in a layered structure where Cu atoms forming dimers are sandwiched in between P atomic networks. In this work, we reveal that Cu atomic dimers vibrate as a rattling mode with frequency around 11meV, which is manifested to be remarkably anharmonic and strongly scatters acoustic phonons to achieve the low lattice thermal conductivity. |
| WOS记录号 | WOS:000582681400009 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/82432]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Qi, Ji,Dong, Baojuan,Zhang, Zhe,et al. Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor[J]. NATURE COMMUNICATIONS,2020,11(1). |
| APA | Qi, Ji.,Dong, Baojuan.,Zhang, Zhe.,Zhang, Zhao.,Chen, Yanna.,...&Zhang, Zhidong.(2020).Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor.NATURE COMMUNICATIONS,11(1). |
| MLA | Qi, Ji,et al."Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor".NATURE COMMUNICATIONS 11.1(2020). |
入库方式： OAI收割
来源：金属研究所
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