Physics – Condensed Matter – Superconductivity
Scientific paper
2004-05-28
Phys. Rev. B70 (2004) 134511
Physics
Condensed Matter
Superconductivity
7 pages, revised with references added
Scientific paper
10.1103/PhysRevB.70.134511
We discuss topological aspects of two-gap superconductors with and without Josephson coupling between gaps. We address nontrivial topological aspects of the dual superconductors and its connections to Meissner effect and flux quantization. The topological knotted string geometry is also discussed in terms of the Hopf invariant, curvature and torsion of the strings associated with U(1)$\times$U(1) gauge group.
Hong Soon-Tae
Niemi Antti J.
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