Thermal transport in thermoelectric materials with chemical bond hierarchy

doi:10.1088/1361-648X/ab03b6

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	Thermal transport in thermoelectric materials with chemical bond hierarchy
	Yang, Jiong; Wang, Yancheng; Yang, Hongliang; Tang, Wei; Yang, Jihui; Chen, Lidong; Zhang, Wenqing
	2019-05-08
Source Publication	JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN	0953-8984
Volume	31 Issue:18
Subtype	Review
Abstract	Chemical bond hierarchy (CBH) depicts a unique structural type of solids, in which fractions of the materials are loosely bonded in a relatively rigid framework. The weak bonding in materials with CBH induces special atomic vibrational motions and has a significant influence on the thermoelectric transport properties. The architecture of compounds with CBH was first proposed by Slack in his 'phonon glass electron crystal' paradigm and has led to the discovery of numerous new thermoelectric compounds over the years. This review covers various types of thermoelectric materials with different levels of CBH, focusing on their lattice thermal conductivities (kappa(L)s). Caged compounds, with foreign impurities in the cages as the rattlers, are the first type of compounds stimulating the study of CBH. The fillers in both the clathrates and the filled skutterudites greatly reduce the kappa(L) accompanied by abnormal temperature dependence. As reviewed herein, the reduced kappa(L) is attributed to different mechanistic sources, i.e., the resonant scattering or the enhanced anharmonic phonon scatterings. Both may contribute to the kappa(L) reductions. In recent years, more materials with different types of CBH have been discovered, some containing complex atomic clusters as the rattlers, and others having flowing atoms that cause multiple equilibrium sites and even liquid-like behaviors. All CBHs strongly interfere with the heat transport of the corresponding materials. Future perspectives and possible research directions for thermal transport in thermoelectric materials with CBH have also been summarized herein.
Keyword	chemical bond hierarchy lattice thermal conductivity thermoelectric materials
DOI	10.1088/1361-648X/ab03b6
Language	英语
WOS Research Area	Physics
Publisher	IOP PUBLISHING LTD
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27122
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Yang, Jiong,Wang, Yancheng,Yang, Hongliang,et al. Thermal transport in thermoelectric materials with chemical bond hierarchy[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2019,31(18).
APA	Yang, Jiong.,Wang, Yancheng.,Yang, Hongliang.,Tang, Wei.,Yang, Jihui.,...&Zhang, Wenqing.(2019).Thermal transport in thermoelectric materials with chemical bond hierarchy.JOURNAL OF PHYSICS-CONDENSED MATTER,31(18).
MLA	Yang, Jiong,et al."Thermal transport in thermoelectric materials with chemical bond hierarchy".JOURNAL OF PHYSICS-CONDENSED MATTER 31.18(2019).

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