Dual neutral variables and knot solitons in triplet superconductors

Physics – Condensed Matter – Superconductivity

Scientific paper

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Replaced with version published in PRL (added a discussion of the effect of the coupling of the fields {\vec s} and {\vec C} o

Scientific paper

10.1103/PhysRevLett.88.177002

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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