Relation between the condensate fraction and the surface tension of superfluid
- 1 February 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 27 (3) , 1913-1915
- https://doi.org/10.1103/physrevb.27.1913
Abstract
The variation of the superfluid order parameter at the liquid surface contributes to the surface tension in proportion to the condensate density. This yields a prediction of the condensate fraction as a function of temperature when proper account is taken of the temperature dependence of the normal components of the surface tension, the largest of which is due to surface modes of vibration. Good agreement is obtained with recent values of the condensate fraction from neutron and x-ray scattering measurements.Keywords
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