Observation of second sound in graphite at temperatures above 100 K
| Autor: | Alexei Maznev, Ke Chen, Keith A. Nelson, Vazrik Chiloyan, R. A. Duncan, Samuel Huberman, Gang Chen, Bai Song, Zhiwei Ding |
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| Přispěvatelé: | Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Department of Chemistry |
| Rok vydání: | 2019 |
| Předmět: |
Length scale
Physics Multidisciplinary Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Phonon FOS: Physical sciences 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Ab initio quantum chemistry methods 0103 physical sciences Second sound Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Graphite Transient (oscillation) 010306 general physics 0210 nano-technology Microscale chemistry |
| Zdroj: | arXiv |
| DOI: | 10.48550/arxiv.1901.09160 |
| Popis: | Wavelike thermal transport in solids, referred to as second sound, is an exotic phenomenon previously limited to a handful of materials at low temperatures. The rare occurrence of this effect restricted its scientific and practical importance. We directly observed second sound in graphite at temperatures above 100 kelvins by using time-resolved optical measurements of thermal transport on the micrometer-length scale. Our experimental results are in qualitative agreement with ab initio calculations that predict wavelike phonon hydrodynamics. We believe that these results potentially indicate an important role of second sound in microscale transient heat transport in two-dimensional and layered materials in a wide temperature range. United States. Office of Naval Research (Grant N00014-16-1-2436) National Science Foundation (U.S.) (Grant EFMA-1542864) United States. Department of Energy. Office of Science. Energy Frontier Research Center (Award DE-SC0001299) United States. Department of Energy. Office of Basic Energy Sciences (Award DE-SC0001299) |
| Databáze: | OpenAIRE |
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