We report simultaneous measurement of the superfluid density and heat capacity of thin 4He films on porous gold and on gold preplated with H2. The superfluid density shows a crossover from 2D-like to 3D critical behavior for temperatures close to Tc, the transition temperature. On both substrates we observe an unexpected heat capacity signature associated with the superfluid layer well below Tc.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)