Structure of the surface vortex sheet between two rotating 3He superfluids.
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 1 / 2-quantum units, independently of the structure of the source vorticity in the bulk. These results are consistent with our NMR measurements.
Hänninen
R
R
Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Finland.
Blaauwgeers
R
R
Eltsov
V B
VB
Finne
A P
AP
Krusius
M
M
Thuneberg
E V
EV
Volovik
G E
GE