Theory of third sound in a compressible and layered superfluid
- 1 April 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 21 (7), 2815-2828
- https://doi.org/10.1103/physrevb.21.2815
Abstract
This paper examines the theory of third sound, without attenuation effects, in layered superfluid films with finite compressibility. This theory, together with the application of a simple thermodynamic model for the film layers shows how the third-sound velocity can undergo strong variations with coverage associated with progressive changes in film compressibility, inlayer phase changes, and layer completion.Keywords
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