Skyrmions induced by dissipationless drag in U(1)×U(1) superconductors
Julien Garaud, Karl A. H. Sellin, Juha Jäykkä, Egor Babaev
DOI 10.1103/PhysRevB.89.104508 · Physical Review B
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Abstract
Rather generically, multicomponent superconductors and superfluids have intercomponent current-current interaction. We show that in superconductors with substantially strong intercomponent drag interaction, the topological defects which form in an external field are characterized by a skyrmionic topological charge. We then demonstrate that they can be distinguished from ordinary vortex matter by a very characteristic magnetization process due to the dipolar nature of inter-skyrmion forces. The results provide an experimental signature to confirm or rule out the formation p-wave state with reduced spin stiffness in p-wave superconductors.
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