Abstract
We report preliminary results of the first heat capacity measurements on atomically layered3He –4He mixture films adsorbed on the surface of graphite. The4He film consists of two solid and two superfluid atomic layers. The heat capacity has been investigated over the range 1 – 70mK as a function of the surface density of3He atoms added to the film. At coveragesn3< 4nm−2, the3He forms a uniform two dimensional Fermi system. The coverage dependence of the linear coefficient of the heat capacity, γ, allows a determination of the hydrodynamic effective mass and \(F_1^s \). At higher coverages a step-like increase in γ is observed, interpreted as the formation of a second two dimensional Fermi system.
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