Observation of second sound in graphite at temperatures above 100 K.
- Resource Type
- Academic Journal
- Authors
- Huberman S; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Duncan RA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Chen K; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Song B; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Chiloyan V; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Ding Z; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Maznev AA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.; Chen G; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. gchen2@mit.edu kanelson@mit.edu.; Nelson KA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. gchen2@mit.edu kanelson@mit.edu.
- Source
- Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-9203 (Electronic) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: PubMed not MEDLINE; MEDLINE
- Subject
- Language
- English
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.
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