Heat-capacity studies of (3)He in (3)He-(4)He mixture films and the coverage dependence of the two-dimensional (3)He Landau Fermi-liquid parameters.
The heat capacity of (3)He in (3)He-(4)He mixture films on a nuclepore substrate is reported over the temperature range 90<T<124 mK, for (3)He coverages between 0.05 and 1.4 bulk-density atomic layers, and a (4)He film thickness of 4.33 bulk-density atomic layers. A step structure appears in the specific heat as a function of (3)He coverage. Combining NMR and specific heat data for (3)He atoms on the same substrate and for the same (4)He coverage allows the two-dimensional Landau Fermi-liquid parameters F(A)(0) and F(S)(1) to be extracted as a function of (3)He coverage. We conclude that in the submonalayer (3)He coverage regime p-state pairing is favored.
Ho
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Laboratory for Low Temperature Physics, Department of Physics, University of Massachusetts at Amherst, Amherst, Massachusetts 01003.
Hallock
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