Vortex sheet on the A-B interface in ³He

The A and B phases are separated by an A-B interface. We have studied the case that there are vortices in the A phase, but not in the B phase. The A and B phases are phase coherent, so that vortices cannot terminate at the interface. Instead, they are deflected and form a surface vortex sheet on the A-B interface. We have calculated the bending of the vorticity and the structure of the surface sheet. The results are consistent with experimental findings.

Publications

• R. Hänninen, R. Blaauwgeers, V.B. Eltsov, A.P. Finne, M. Krusius, E.V. Thuneberg, and G.E. Volovik: Structure of surface vortex sheet between two rotating ³He superfluids, Phys. Rev. Lett 90, 225301 (2003), cond-mat 0303343.
• Transparencies of a talk: Vortices at the A-B phase boundary in superfluid ³He (17.5.2003, R. Hänninen, pdf file, 3 Mb).
• Transparencies of a talk: Vortex sheet on the A-B interface in superfluid ³He (6.8.2003, E. Thuneberg, pdf file, 1 Mb).

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