The Effect of Film Thickness and the Substrate on Superfluid 3He Film Flow

摘要: The self-emptying beaker technique was used to study the superfluid properties of thin film liquid 3He. Superfluid flow observed only below bulk transition temperature at 0.93 mK. In a separate experiment minimum thickness determined as function 3He level in beaker. Thus, rate, or critical current density, and thickness. Extrapolation allowed determination (Tc) zero density Jc (0) Tc agreed with predicted superfluid-normal phase boundary 2d/(T) c where d is ξ(T) coherence length. an order magnitude smaller than expected for dissipation by pair-breaking. When 4He monolayer adsorbed on surface beaker, it suppressed diffuse scattering quasiparticles substrate boundary, also Freeman et al. There no measurable suppression even films 100 nm. With without teere always abrupt drop flow-rate when thinned about 200 This may be associated between thick B-like A-like phase.