Vortex core transitions in superfluid 3He in globally anisotropic aerogels
arXiv:1007.4045 · doi:10.1007/s10909-009-0012-y
Abstract
Core structures of a single vortex in A-like and B-like phases of superfluid 3He in uniaxially compressed and stretched aerogels are studied by numerically solving Ginzburg-Landau equations derived microscopically. It is found that, although any uniaxial deformation leads to a wider A-like phase with the axial pairing in the pressure-temperature phase diagram, the vortex core states in the two phases in aerogel depend highly on the type of deformation. In a compressed aerogel, the first-order vortex core transition (VCT) previously seen in the bulk B phase appears at any pressure in the B-like phase while no strange vortex core is expected in the corresponding A-like phase. By contrast, in a stretched aerogel, the VCT in the B-like phase is lost while another VCT is expected to occur between a nonunitary core and a polar one in the A-like phase. Experimental search for these results is hoped to understand correlation between superfluid 3He and aerogel structure.
7 pages, 6 figures Text was changed. Resubmitted version
References in corpus (6)
- On Larkin-Imry-Ma State of 3He-A in Aerogel
- Pairing States of Superfluid 3He in Uniaxially Anisotropic Aerogel
- Strong orientational effect of stretched aerogel on the 3He order parameter
- Impurity Effects of Aerogel in Superfluid He
- The A-B Transition of Superfluid Helium-3 in Aerogel and the Effect of Anisotropic Scattering
- Superfluid He in globally isotropic random media