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DOI | 10.1038/s41467-018-07357-w |
Direct measurement of individual phonon lifetimes in the clathrate compound Ba7.81Ge40.67Au5.33 | |
Lory, Pierre-Francois1,2; Pailhes, Stephane3; Giordano, Valentina M.3; Euchner, Holger4; Hong Duong Nguyen5; Ramlau, Reiner5; Borrmann, Horst5; Schmidt, Marcus5; Baitinger, Michael5; Ikeda, Matthias6; Tomes, Petr6; Mihalkovic, Marek7; Allio, Celine8; Johnson, Mark Robert1; Schober, Helmut1,9; Sidis, Yvan10; Bourdarot, Frederic11; Regnault, Louis Pierre11; Ollivier, Jacques1; Paschen, Silke6; Grin, Yuri5; de Boissieu, Marc2 | |
2017-09-08 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Austria; Germany; Slovakia |
英文摘要 | Engineering lattice thermal conductivity requires to control the heat carried by atomic vibration waves, the phonons. The key parameter for quantifying it is the phonon lifetime, limiting the travelling distance, whose determination is however at the limits of instrumental capabilities. Here, we show the achievement of a direct quantitative measurement of phonon lifetimes in a single crystal of the clathrate Ba7.81Ge40.67Au5.33, renowned for its puzzling 'glass-like' thermal conductivity. Surprisingly, thermal transport is dominated by acoustic phonons with long lifetimes, travelling over distances of 10 to 100 nm as their wave-vector goes from 0.3 to 0.1 angstrom(-1). Considering only low-energy acoustic phonons, and their observed lifetime, leads to a calculated thermal conductivity very close to the experimental one. Our results challenge the current picture of thermal transport in clathrates, underlining the inability of state-of-the-art simulations to reproduce the experimental data, thus representing a crucial experimental input for theoretical developments. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410003800005 |
WOS关键词 | THERMAL-CONDUCTIVITY ; CRYSTAL ; SCATTERING ; TRANSPORT ; DYNAMICS ; MODES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204101 |
专题 | 资源环境科学 |
作者单位 | 1.Inst Laue Langevin, F-38000 Grenoble, France; 2.Univ Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, France; 3.Univ Claude Bernard Lyon 1, Univ Lyon, CNRS, Inst Light & Matter, F-69622 Villeurbanne, France; 4.Vienna Univ Technol, Inst Mat Sci & Technol, A-1040 Vienna, Austria; 5.Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany; 6.Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria; 7.Slovak Acad Sci, Inst Phys, Bratislava 84511, Slovakia; 8.Goethe Univ, Phys Inst, D-60438 Frankfurt, Germany; 9.Univ Grenoble Alpes, UFR PhITEM, F-38000 Grenoble, France; 10.CEA, CNRS, UMR 12, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France; 11.Univ Grenoble Alpes, CEA, INAC, F-38000 Grenoble, France |
推荐引用方式 GB/T 7714 | Lory, Pierre-Francois,Pailhes, Stephane,Giordano, Valentina M.,et al. Direct measurement of individual phonon lifetimes in the clathrate compound Ba7.81Ge40.67Au5.33[J]. NATURE COMMUNICATIONS,2017,8. |
APA | Lory, Pierre-Francois.,Pailhes, Stephane.,Giordano, Valentina M..,Euchner, Holger.,Hong Duong Nguyen.,...&de Boissieu, Marc.(2017).Direct measurement of individual phonon lifetimes in the clathrate compound Ba7.81Ge40.67Au5.33.NATURE COMMUNICATIONS,8. |
MLA | Lory, Pierre-Francois,et al."Direct measurement of individual phonon lifetimes in the clathrate compound Ba7.81Ge40.67Au5.33".NATURE COMMUNICATIONS 8(2017). |
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