Localized vibrational modes in metallic solids
文献类型：期刊论文
| 作者 | Keppens, V ; Mandrus, D ; Sales, BC ; Chakoumakos, BC ; Dai, P ; Coldea, R ; Maple, MB ; Gajewski, DA ; Freeman, EJ ; Bennington, S |
| 刊名 | NATURE
 |
| 出版日期 | 1998 |
| 卷号 | 395期号:6705页码:876 |
| 关键词 | LAFE4P12 ANTIMONIDES EARTH |
| ISSN号 | 0028-0836 |
| 通讯作者 | Sales, BC (reprint author), Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA. |
| 中文摘要 | Filled skutterudite antimonides(1,2) are cubic compounds with the formula RM4Sb12, where R is a rare-earth element (such as La or Ce), and M is a transition metal (for example, Fe or Co). The rare-earth ion is weakly bound in an oversized atomic cage formed by the other atoms. Its presence has been shown to cause a dramatic reduction in the lattice component of the thermal conductivity, while having little effect on the electronic properties(3-5) of the compound. This combination of properties makes filled skutterudites of interest as thermoelectric materials. It has been suggested(4) that localized, incoherent vibrations of the rare-earth ion are responsible for the reduction in thermal conductivity, but no direct evidence for these local vibrational modes exists. Here we report the observation of local modes in La-filled skutterudites, using heat capacity, elastic constant and inelastic neutron scattering measurements. The La atoms show unusual thermodynamic behaviour, characterized by the presence of two low-energy localized modes. Our results suggest that consideration of local modes will play an important role in the design of the next generation of thermoelectric materials. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-02-20 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57898]  |
| 专题 | 物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文 |
| 推荐引用方式 GB/T 7714 | Keppens, V,Mandrus, D,Sales, BC,et al. Localized vibrational modes in metallic solids[J]. NATURE,1998,395(6705):876. |
| APA | Keppens, V.,Mandrus, D.,Sales, BC.,Chakoumakos, BC.,Dai, P.,...&Bennington, S.(1998).Localized vibrational modes in metallic solids.NATURE,395(6705),876. |
| MLA | Keppens, V,et al."Localized vibrational modes in metallic solids".NATURE 395.6705(1998):876. |
入库方式： OAI收割
来源：物理研究所
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