Substrate influenced specific heat of non-superfluid helium films

We have investigated the low temperature specific heat of non-superfluid 4He films, less than two layers thick, adsorbed in a cylindrical geometry, Anopore membranes, and in a multiply connected geometry, Millipore filter paper. A specific heat lump, shifting to lower temperatures with increasing th...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1994-02, Vol.194, p.639-640
Main Authors: Yeager, Charles J., Steele, Lindsay M., Finotello, Daniele
Format: Article
Language:English
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Summary:We have investigated the low temperature specific heat of non-superfluid 4He films, less than two layers thick, adsorbed in a cylindrical geometry, Anopore membranes, and in a multiply connected geometry, Millipore filter paper. A specific heat lump, shifting to lower temperatures with increasing thickness, disappearing for superfluid coverages, is seen for both substrates. A bump is also found for 3He films in Anopore. We discuss the bump's temperature and thickness dependence.
ISSN:0921-4526
DOI:10.1016/0921-4526(94)90649-1