Third-sound study of a layered superfluid film
- 6 January 1992
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 68 (1) , 60-63
- https://doi.org/10.1103/physrevlett.68.60
Abstract
Isothermal scans of third-sound velocity as a function of He-4 coverage on graphite exhibit pronounced dips with integral layer periodicity. The minimum He-4 coverage on graphite needed to support third sound is nearly three layers. The heat-capacity isotherm exhibits minima at layer completion but there is no noticeable feature related to the onset of superfluidity. High-resolution adsorption isotherms below 1 K show that He-4 film grows layer by layer through at least seven layersKeywords
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