Vortices with Fractional Flux Quanta in Multi-Band Superconductors
arXiv:1510.05890 · doi:10.1007/s10948-015-3309-x
Abstract
In superconductors with three or more components, time-reversal symmetry may be broken when the inter-component couplings are repulsive, leading to a superconducting state with two-fold degeneracy. When prepared carefully there is a stable domain wall on a constriction which connects two bulks in states with opposite chiralities. Applying on external magnetic field, vortices in different components dissociate with each other, resulting in a ribbon shape distribution of magnetic field at the position of domain wall.
4 pages, 4 figures, to appear on Journal of Superconductivity and Novel Magnetism
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