Evidence for Anomalous Phonon Excitations in Solid
- 8 December 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 23 (23), 1330-1332
- https://doi.org/10.1103/physrevlett.23.1330
Abstract
Thermal-conductivity measurements in solid in the bcc phase and at temperatures below about 0.5°K show an unexpected temperature dependence which is less than . Specific-heat measurements, in this temperature range, have been reported as showing a closely similar effect, and this provides evidence for a thermal excitation which must take part in the heat transport. In addition, Poiseuille flow of phonons has been directly observed.
Keywords
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