ION TRANSPORT IN SUPERFLUID 3HE
For T < 2.73 mK, liquid 3He becomes superfluid because of the formation of atomic Cooper pairs. The Pauli exclusion principle keeps atoms at a distance from each other so that the pair has non negligible angular momentum. The pairing is anisotropic, giving origin to a very rich phase diagram of the superfluid. The pairing anisotropy affects the ion mobility, which also turns out to be anisotropic. The richness of the superfluid phase diagram is reflected in the ion transport properties. The presence of anisotropy and textures makes theory extremely complicated. Magnetic fields modify both phase diagram and ion mobility. Vortices are also present in the superfluid in a much greater variety of types than in 4He. This fact has made experiments very difficult, and, in fact, their number is small.
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