Surface Superfluidity in Dilute He4-He3 Mixtures
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Quantitative measurements have been made of the superfluid mass per unit area for the interfacial superfluid phase present at the boundary wall of low-concentration mixtures of He4 in liquid He3. We find a rapid jump in the superfluid mass at the transition temperature in agreement with the prediction of the Kosterlitz-Thouless theory of the superfluid transition in a two-dimensional system. 1984 The American Physical Society.