Abstract
We report on a study of the heat capacity of thin films of 4He adsorbed in porous Vycor glass for temperatures between 20 and 700 mK. As in previous work, we find a critical coverage, nc∼26.6μmoles/m2, above which we find superfluidity. For coverages greater than nc, the heat capacity varies linearly with temperature above the superfluid transition temperature Tc. We also observe a linear dependence at high temperatures for coverages below nc. At lower temperatures, however, the heat capacity for these coverages decreases with a much stronger temperature dependence. We discuss these data in the context of recent theoretical work on the onset of superfluidity in disordered systems.
Original language | English (US) |
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Pages (from-to) | 623-624 |
Number of pages | 2 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 194-196 |
Issue number | PART 1 |
DOIs | |
State | Published - Feb 2 1994 |
Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by the NSF under Grant No. DMR-8921733 and by the MRL program of the NSF under Grant. No. DMR-91-21654, MSC Report No. 7563.