Haavasoja, T. ; Narayanamurti, V. ; Chin, M. A. ; Bhatt, R. N. (1983) Observation of a high-frequency cutoff for phonon propagation in liquid 4He Physical Review Letters, 51 (26). pp. 2406-2409. ISSN 0031-9007
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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.51.240...
Related URL: http://dx.doi.org/10.1103/PhysRevLett.51.2406
Abstract
A new high-frequency cutoff for phonon propagation which lies beyond the well-known low-frequency cutoff due to anomalous dispersion is observed in phonon propagation experiments in liquid 4He using superconducting Sn and A1 tunnel-junction generators and detectors. The cutoff depends strongly on pressure and is interpreted as arising from a strong increase in phase space for phonon-roton scattering as normal dispersion in the phonon branch sets in.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 30650 |
| Deposited On: | 23 Dec 2010 12:58 |
| Last Modified: | 11 Jun 2011 08:05 |
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