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Structure of surface vortex sheet between two rotating 3He superfluids

R. Hänninen·R. Blaauwgeers·V. B. Eltsov·A. P. Finne·M. Krusius·E. V. Thuneberg·G. E. Volovik
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Abstract

We study a two-phase sample of superfluid 3He where vorticity exists in one phase (3He-A) but cannot penetrate across the interfacial boundary to a second coherent phase (3He-B). We calculate the bending of the vorticity into a surface vortex sheet on the interface and solve the internal structure of this new type of vortex sheet. The compression of the vorticity from three to two dimensions enforces a structure which is made up of half-quantum units, independently of the structure of the source vorticity in the bulk. These results are consistent with our NMR measurements.

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R. Hänninen, R. Blaauwgeers, V. B. Eltsov, A. P. Finne, M. Krusius, E. V. Thuneberg, G. E. Volovik. 2003-03-18. Structure of surface vortex sheet between two rotating 3He superfluids. https://doi.org/10.1103/physrevlett.90.225301

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