Spin polarization of half-quantum vortex in systems with equal spin pairing

Details Spin polarization of half-quantum vortex in systems with equal spin pairing Spin polarization of half-quantum vortex in systems with equal spin pairing

2009-05-15

arxiv.org/abs/0905.2631v1

Phys. Rev. Lett. 103, 057003 (2009)

Physics

Condensed Matter

Superconductivity

4 pages

Scientific paper

We present a variational analysis for a half-quantum vortex (HQV) in the equal-spin-pairing superfluid state which, under suitable conditions, is believed to be realized in Sr2RuO4 and 3He-A. Our approach is based on a description of the HQV in terms of a BCS-like wave function with a spin-dependent boost. We predict a novel feature: the HQV, if stable, should be accompanied by a non-zero spin polarization. Such a spin polarization would exist in addition to the one induced by the Zeeman coupling to the external field and hence may serve as an indicator in experimental search for HQV.

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