Multiple emerging nano-phases are at the origin of the low lattice thermal conductivity of SnSe?
文献类型：期刊论文
| 作者 | Xu, Wei,; Shang, Peng-Peng,,; Marcelli, Augusto,; Cibin, Giannantonio; Li, Jing-Feng |
| 刊名 | Materials Today Physics
 |
| 出版日期 | 2022 |
| 卷号 | 24页码:100656 |
| DOI | 10.1016/j.mtphys.2022.100656 |
| 文献子类 | Article |
| 英文摘要 | Thermoelectrics are well recognized materials for energy harvesting and many solid-state cooling devices are already present on the market. SnSe is an inexpensive binary system made by earth-abundant elements that holds the record-high performance among the semiconductor materials although the origin of its ultralow thermal conductivity is still not understood. Both X-ray and neutron diffraction experiments identified in SnSe at high temperature a transition from the α-phase (Pnma) to the β-phase (Cmcm). In this contribution using for the first time in-situ temperature-dependent X-ray Absorption Fine structure spectroscopy (T-XAFS) at Sn and Se K-edge, we showed the occurrence in the XAS data of two isosbestic points, which support the coexistence of two phases in a wide temperature range. Moreover, in the SnSe matrix Sn–O bonds are continuously formed and SnO2, SeO2 and SnSe2 nanophases are emerging at high temperature. The experiment points out how these local nanophases are formed above 600 K. These emerging nano-phases affect the mean free path of phonons reducing the lattice thermal conductivity and, together with the crystal structural phase transition, may account for the low thermal conductivity measured in SnSe single crystals. © 2022 Elsevier Ltd |
| 电子版国际标准刊号 | 25425293 |
| 语种 | 英语 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299854]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Xu, Wei,,Shang, Peng-Peng,,,Marcelli, Augusto,,et al. Multiple emerging nano-phases are at the origin of the low lattice thermal conductivity of SnSe?[J]. Materials Today Physics,2022,24:100656. |
| APA | Xu, Wei,,Shang, Peng-Peng,,,Marcelli, Augusto,,Cibin, Giannantonio,&Li, Jing-Feng.(2022).Multiple emerging nano-phases are at the origin of the low lattice thermal conductivity of SnSe?.Materials Today Physics,24,100656. |
| MLA | Xu, Wei,,et al."Multiple emerging nano-phases are at the origin of the low lattice thermal conductivity of SnSe?".Materials Today Physics 24(2022):100656. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。