Liquid-like thermal conduction in intercalated layered crystalline solids
- Japan Atomic Energy Agency, Tokai, Ibaraki (Japan). J-PARC Center
- Univ. of California, Irvine, CA (United States). Department of Physics and Astronomy
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Department of Physics and Astronomy
- Julich Center for Neutron Science, Forschungszentrum Julich GmbH (Germany)
- Univ. of Hong Kong (China). Department of Mechanical Engineering
- Southern University of Science and Technology (SUSTech), Shenzhen (China). Department of Physics
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo (Japan). SPring-8
- Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki (Japan). Neutron Science and Technology Center
- Hebei University, Baoding (China). Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology
- Northwestern Univ., Evanston, IL (United States). Department of Chemistry
As a generic property, all substances transfer heat through microscopic collisions of constituent particles. A solid conducts heat through both transverse and longitudinal acoustic phonons, but a liquid employs only longitudinal vibrations. As a result, a solid is usually thermally more conductive than a liquid. In canonical viewpoints, such a difference also serves as the dynamic signature distinguishing a solid from a liquid. Here in this work, we report liquid-like thermal conduction observed in the crystalline AgCrSe2. The transverse acoustic phonons are completely suppressed by the ultrafast dynamic disorder while the longitudinal acoustic phonons are strongly scattered but survive, and are thus responsible for the intrinsically ultralow thermal conductivity. This scenario is applicable to a wide variety of layered compounds with heavy intercalants in the van der Waals gaps, manifesting a broad implication on suppressing thermal conduction. Finally, these microscopic insights might reshape the fundamental understanding on thermal transport properties of matter and open up a general opportunity to optimize performances of thermoelectrics.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-07CH11358; FG02-05ER46237
- OSTI ID:
- 1427732
- Report Number(s):
- IS-J-9604; PII: 4; TRN: US1802604
- Journal Information:
- Nature Materials, Vol. 17, Issue 3; ISSN 1476-1122
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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