Singular Vortex in Narrow Cylinders of Superfluid 3He-A Phase

Details Singular Vortex in Narrow Cylinders of Superfluid 3He-A Phase Singular Vortex in Narrow Cylinders of Superfluid 3He-A Phase

2009-07-08

arxiv.org/abs/0907.1346v1

J. Phys. Soc. Jpn. 78, 114606 (2009).

Physics

Condensed Matter

Superconductivity

22 pages, 12 figures

Scientific paper

Motivated by the on-going rotating cryostat experiments in ISSP, Univ. of Tokyo, we explore the textures and vortices in superfluid 3He-A phase confined in narrow cylinders, whose radii are R=50mum and 115mum. The calculations are based on the Ginzburg-Landau (GL) framework, which fully takes into account the orbital (l-vector) and spin (d-vector) degrees of freedom for chiral p-wave pairing superfluid. The GL free energy functional is solved numerically by using best known GL parameters appropriate for the actual experimental situations at P=3.2MPa and H=21.6mT. We identify the ground state l-vector configuration as radial disgyration (RD) texture with the polar core both at rest and low rotations and associated d-vector textures for both narrow cylinder systems under high magnetic fields. The RD which has a singularity at center, changes into Mermin-Ho texture above the critical rotation speed which is determined precisely, providing an experimental check for own proposal.

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