| Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor | |
| Qi, Ji1,2; Dong, Baojuan1; Zhang, Zhe1,2; Zhang, Zhao1,2; Chen, Yanna3; Zhang, Qiang4; Danilkin, Sergey5; Chen, Xi6,7; He, Jiaming6; Fu, Liangwei8; Jiang, Xiaoming9; Chai, Guozhi10; Hiroi, Satoshi3; Ohara, Koji11; Zhang, Zongteng1,2; Ren, Weijun1; Yang, Teng1,2; Zhou, Jianshi6; Osami, Sakata3; He, Jiaqing8; Yu, Dehong5; Li, Bing1,2; Zhang, Zhidong1,2 | |
| Corresponding Author | Yu, Dehong(dyu@ansto.gov.au) ; Li, Bing(bingli@imr.ac.cn) |
| 2020-10-15 | |
| Source Publication | NATURE COMMUNICATIONS
 |
| ISSN | 2041-1723 |
| Volume | 11Issue:1Pages:8 |
| Abstract | 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. |
| Funding Organization | National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Liaoning Revitalization Talents Program ; NSF |
| DOI | 10.1038/s41467-020-19044-w |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Science & Technology - Other Topics |
| WOS Subject | Multidisciplinary Sciences |
| WOS ID | WOS:000582681400009 |
| Publisher | NATURE RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/141169 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yu, Dehong; Li, Bing |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 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 11.Japan Synchrotron Radiat Res Inst, Diffract & Scattering Div, SPring 8, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan |
| Recommended Citation 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. |
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