Abstract
Superfluid persistent currents have been studied in He4 films adsorbed on a porous Vycor glass substrate at temperatures down to 150 mK. Stable superflow was observed in films as thin as 2.4 atomic layers at the lowest temperatures. Critical-velocity and superfluid-mass data were obtained as a function of film thickness. These data indicate that on a Vycor substrate superflow is only possible for films greater than 2 atomic layers in thickness and, further, that only the coverage above the first two layers contributes to the superflow.
Original language | English (US) |
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Pages (from-to) | 1347-1350 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 32 |
Issue number | 24 |
DOIs | |
State | Published - 1974 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy