Effect of kinematic spin polarization in half-quantum vortex state on its stability

It has been shown recently [1] that a half-quantum vortex state in systems with equal spin pairing posses, in addition to a regular spin polarization produced by the Zeeman coupling, a spin polarization of purely kinematic nature. We discuss implications of such kinematic spin polarization on the stability of the half-quantum vortex and its possible experimental signatures in candidate equal spin pairing systems such as Sr₂RuO₄.

[1] V. Vakaryuk and A. J. Leggett, Phys. Rev. Lett. 103, 057003 (2009).