Observation of second sound in graphite at temperatures above 100 K
Author(s)Huberman, Samuel C.; Duncan, Ryan Andrew; Chen, Ke; Song, Bai; Chiloyan, Vazrik; Ding, Zhiwei; Maznev, Alexei; Chen, Gang; Nelson, Keith Adam; ... Show more Show less
MetadataShow full item record
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.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Department of Chemistry
American Association for the Advancement of Science (AAAS)
Huberman, S. et al. "Observation of second sound in graphite at temperatures above 100 K." Science 364, 6438 (April 26, 2019): 375-379 © 2019 American Association for the Advancement of Science
Author's final manuscript