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Dimer rattling mode induced low thermal conductivity in an excellent acoustic conductor.
Qi, Ji; Dong, Baojuan; Zhang, Zhe; Zhang, Zhao; Chen, Yanna; Zhang, Qiang; Danilkin, Sergey; Chen, Xi; He, Jiaming; Fu, Liangwei; Jiang, Xiaoming; Chai, Guozhi; Hiroi, Satoshi; Ohara, Koji; Zhang, Zongteng; Ren, Weijun; Yang, Teng; Zhou, Jianshi; Osami, Sakata; He, Jiaqing; Yu, Dehong; Li, Bing; Zhang, Zhidong.
Afiliación
  • Qi J; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • Dong B; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China.
  • Zhang Z; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • Zhang Z; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • Chen Y; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China.
  • Zhang Q; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • Danilkin S; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China.
  • Chen X; Synchrontron X-ray station at SPring-8, Research Network and Facility Services Division, National Institute for Materials Science (NIMS), 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo, 679-5148, Japan.
  • He J; Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
  • Fu L; Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee, DC, NSW 2232, Australia.
  • Jiang X; Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, 78712, USA.
  • Chai G; Department of Electrical and Computer Engineering, University of California, Riverside, CA, 92521, USA.
  • Hiroi S; Department of Mechanical Engineering, University of Texas at Austin, Austin, TX, 78712, USA.
  • Ohara K; Department of Physics, Southern University of Science and Technology, Shenzhen, 518005, China.
  • Zhang Z; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
  • Ren W; Key Lab for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou, 730000, China.
  • Yang T; Synchrontron X-ray station at SPring-8, Research Network and Facility Services Division, National Institute for Materials Science (NIMS), 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo, 679-5148, Japan.
  • Zhou J; SPring-8, Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo, 679-5198, Japan.
  • Osami S; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • He J; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China.
  • Yu D; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • Li B; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.
  • Zhang Z; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China.
Nat Commun ; 11(1): 5197, 2020 Oct 15.
Article en En | MEDLINE | ID: mdl-33060588
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 4155 m s-1, comparable to GaAs, but single crystals show very low lattice thermal conductivity of about 4 W m-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 11 meV, which is manifested to be remarkably anharmonic and strongly scatters acoustic phonons to achieve the low lattice thermal conductivity.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido