Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor

doi:10.1038/s41467-020-19044-w

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	Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor
	Qi, Ji 1,2; Dong, Baojuan 2; Zhang, Zhe 1,2; Zhang, Zhao 1,2; Chen, Yanna 3; Zhang, Qiang 4; Danilkin, Sergey 5; Chen, Xi 6,7; He, Jiaming 6; Fu, Liangwei 8
刊名	NATURE COMMUNICATIONS
	2020-10-15
卷号	11 期号:1 页码:8
ISSN号	2041-1723
DOI	10.1038/s41467-020-19044-w
通讯作者	Yu, Dehong(dyu@ansto.gov.au) ; Li, Bing(bingli@imr.ac.cn)
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.
资助项目	National Natural Science Foundation of China[11934007] ; National Natural Science Foundation of China[11804346] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[ZDBS-LY-JSC002] ; Liaoning Revitalization Talents Program[XLYC1807122] ; NSF[MRSEC DMR-1720595]
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000582681400009
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Liaoning Revitalization Talents Program ; NSF
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/141171]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yu, Dehong; Li, Bing
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Natl Inst Mat Sci NIMS, Res Network & Facil Serv Div, Synchrontron X Ray Stn SPring 8, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan 4.Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA 5.Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee, NSW 2232, Australia 6.Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA 7.Univ Calif Riverside, Dept Elect & Comp Engn, Riverside, CA 92521 USA 8.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518005, Peoples R China 9.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China 10.Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China
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):8.
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),8.
MLA	Qi, Ji,et al."Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor".NATURE COMMUNICATIONS 11.1(2020):8.