Abstract
This review describes sound propagation in the normal state and the superfluid B phase of 3He. The l=1 nature of Cooper pairing in superfluid 3He leads to a complex collective mode spectrum. A number of the collective modes couple to sound. The expressions for the collective mode frequencies are derived using a phenomenological theory. Cryogenic and ultrasonic measurement techniques are briefly discussed, followed by a review of the results of sound propagation experiments, in particular those that show coupling to the collective modes. The effects of fields, textures and dispersion are also reviewed.
Original language | English (US) |
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Pages (from-to) | 147-202 |
Number of pages | 56 |
Journal | Advances in Physics |
Volume | 41 |
Issue number | 2 |
DOIs | |
State | Published - Jan 1 1992 |
Funding
We would like to thank W. P. Halperin, J. A. Sauls, and D. Rainer for useful discussions. This work was supported by the NSF under grant DMR-89-07396. The low temperature facility receives support from the Materials Research Center under NSF Grant DMR-88-21571. We would like to especially thank Ms A. Jackson for typing the manuscript and patience with the endless revisions.
ASJC Scopus subject areas
- Condensed Matter Physics