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Dual neutral variables and knot solitons in triplet superconductors

Egor Babaev
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Abstract

In this paper we derive a dual presentation of free energy functional for spin-triplet superconductors in terms of gauge-invariant variables. The resulting equivalent model in ferromagnetic phase has a form of a version of the Faddeev model. This allows one in particular to conclude that spin-triplet superconductors allow formation of stable finite-length closed vortices (the knotted solitons).

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Egor Babaev. 2002-04-19. Dual neutral variables and knot solitons in triplet superconductors. https://doi.org/10.1103/physrevlett.88.177002

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