Off-center rattling triggers high-temperature thermal transport in thermoelectric clathrates: Nonperturbative approach

Xi Qing; Zhang Zhongwei; Nakayama Tsuneyoshi; Chen Jie; Zhou Jun; Li Baowen

首页> 外文期刊>Physical review, B >Off-center rattling triggers high-temperature thermal transport in thermoelectric clathrates: Nonperturbative approach

【24h】

Off-center rattling triggers high-temperature thermal transport in thermoelectric clathrates: Nonperturbative approach

机译：偏离中心嘎嘎声触发热电包装中的高温热输送：非触发方法

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

Lattice thermal conductivities kappa(L) of type-I clathrates encapsulating "off-center" guest atoms behave in a way that is sharply different from those of conventional crystals such as on-center type-I clathrates. The latter decreases with increasing temperature according to 1/T above a few tens K, while kappa(L) of off-center clathrates increase T linearly above a few tens of K. Further increasing temperature above T greater than or similar to 100 K, kappa(L) saturates without exhibiting appreciable T dependence. In this temperature regime, the standard formulation of kappa(L) based on the perturbation theory is unfeasible. We herein present a theory of kappa(L) based on a "nonperturbative" approach by taking into account the interaction between nonvibrational off-center rattling states of guest atoms and cage shells. It is remarkable that our theory shows excellent agreement with observed kappa(L) (T) for off-center clathrates in magnitudes, the cage volume Omega dependence, and T dependence.

机译：封装“偏离中心”来宾原子的晶格热导体Kappa（L）以一种急剧不同的方式与诸如在中心类型-I克拉里斯的常规晶体中的方式行事。后者随温度的增加，根据1 / t以上的温度，而偏心克拉内的kappa（l）升高到几十只K的线性增加。进一步提高到高于或类似于100k的温度， Kappa（L）饱和而不表现出可观的T依赖性。在该温度制度中，基于扰动理论的Kappa（L）的标准制剂是不可行的。我们通过考虑到客体原子和笼壳的非抗性偏离中心嘎嘎声之间的相互作用，我们基于“非触发”方法，本文提出了一种kappa（l）的理论。我们的理论显着展示了与观察到的Kappa（L）（T）以大小，笼量ω依赖性和依赖性的关注的κ（L）（T）吻合。

著录项

来源
《Physical review, B》 |2018年第22期|共6页
作者
Xi Qing; Zhang Zhongwei; Nakayama Tsuneyoshi; Chen Jie; Zhou Jun; Li Baowen;
展开▼
作者单位

Tongji Univ Ctr Phonon &

Thermal Energy Sci Sch Phys Sci &

Engn Shanghai 200092 Peoples R China;

Tongji Univ Ctr Phonon &

Thermal Energy Sci Sch Phys Sci &

Engn Shanghai 200092 Peoples R China;

Tongji Univ Ctr Phonon &

Thermal Energy Sci Sch Phys Sci &

Engn Shanghai 200092 Peoples R China;

Tongji Univ Ctr Phonon &

Thermal Energy Sci Sch Phys Sci &

Engn Shanghai 200092 Peoples R China;

Tongji Univ Ctr Phonon &

Thermal Energy Sci Sch Phys Sci &

Engn Shanghai 200092 Peoples R China;

Univ Colorado Dept Mech Engn Boulder CO 80309 USA;

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类固体物理学;
关键词

相似文献

外文文献
中文文献
专利

1. Off-center rattling triggers high-temperature thermal transport in thermoelectric clathrates: Nonperturbative approach [J] . Qing Xi, Zhongwei Zhang, Tsuneyoshi Nakayama, Physical review. B, Condensed Matter And Materals Physics . 2018,第22期

机译：偏离中心的嘎嘎声触发热电包合物中的高温热传递：非扰动方法
2. Off-center rattling and thermoelectric properties of type-Ⅱ clathrate (K, Ba)_(24)(Ga, Sn, □)_(136) single crystals [J] . S. Mano, T. Onimaru, S. Yamanaka, Physical review . 2011,第21期

机译：Ⅱ型笼形（K，Ba）_（24）（Ga，Sn，□）_（136）单晶的偏心嘎嘎声和热电性能
3. Off-center rattling modes and glasslike thermal conductivity in the type-I clathrate Ba_8Ga_(16)Sn_(30) [J] . K. Suekuni, Y. Takasu, T. Hasegawa, Physical review . 2010,第20期

机译：I型笼形Ba_8Ga_（16）Sn_（30）的偏心嘎嘎声模式和玻璃状导热性
4. Mechanical and Thermal Properties of Single Crystals of Some Thermoelectric Clathrate Compounds [C] . Norihiko L. Okamoto, Takahiro Nakano, Kyosuke KisMda Materials Research Society Symposium . 2009

机译：一些热电包酸盐化合物的单晶的机械和热性能
5. Thermoelectric properties of europium and ytterbium doped cobalt antimonide skutterudites and novel thermal transport in type-II silicon clathrates . [D] . Lamberton, Gary Austin, Jr. 2004

机译：and和do掺杂的锑化锑钴方钴矿的热电性质和II型硅包合物中的新型热传输。
6. High-temperature thermoelectric transport at small scales: Thermal generation transport and recombination of minority carriers [O] . Gokhan Bakan, Niaz Khan, Helena Silva, -1

机译：小规模高温热电运输：少数载流子的热产生运输和重组
7. Significance of Off-Center Rattling for Emerging Low-lying THz Modes in type-I Clathrates [O] . Tsuneyoshi Nakayama, Eiji Kaneshita 2016

机译：I型包合物中新兴低位THz模式的偏心嘎嘎声的意义
8. Electrical and Thermal Transport Property Studies of High-Temperature Thermoelectric Materials [R] . Weber, W. J., Bates, J. L., Griffin, C. W., 1986

机译：高温热电材料的电学和热传输特性研究

Off-center rattling triggers high-temperature thermal transport in thermoelectric clathrates: Nonperturbative approach

摘要

著录项

相似文献

相关主题

期刊订阅