Hard domain walls in superfluid 3He-B

Abstract

We study theoretically planar interfaces between two domains of superfluid 3He-B. The structure of the B-B walls is determined on the scale of the superfluid condensation energy, and thus the domain walls have thickness on the order of the Ginzburg-Landau coherence length. We study the stability and decay schemes of five inequivalent structures of such domain walls using one-dimensional Ginzburg-Landau simulation. We find that only one of the structures is stable against small perturbations. We also argue that B-B interfaces could result from adiabatic A to B transition and study textures at B-B interfaces. The B-B interface has a strong orienting effect on spin-orbit rotation producing textures similar as caused by external walls. We study the B-B interface in a parallel-plate geometry and find that the conservation of spin current sets an essential condition on the structure. The stable B-B interface gives rise to half-quantum circulation.

14 pages, 10 figures, updated to the published version including one more figure, discussion of excitation spectrum, more references and some clarifications

References in corpus (5)

• Crystalline order in superfluid 3He films
• Topological Fermi arcs in superfluid ${}^3$He
• Edge Current due to Majorana Fermions in Superfluid ${}^3$He A- and B-Phases
• Superfluid 3He in a restricted geometry with a perpendicular magnetic field
• Domain Walls in Superfluid 3He-B

Cited by in corpus (2)

• Strong-coupling corrections to hard domain walls in superfluid 3He-B
• Superfluid phase transition of nanoscale-confined helium-3