Superconductors that do not expel magnetic flux
arXiv:1805.00126 · doi:10.1016/j.ssc.2018.04.012
Abstract
An ultrathin superconducting bilayer creates a coreless fractional vortex when only the second layer has a hole. The quantization is broken by the hole, and the normal core disappears. The magnetic flux is no longer confined near the normal core, and its density profile around the hole becomes similar to that of a crème caramel; the divergence of the magnetic flux density is truncated around the center. We propose basic design of a practical device to realize a coreless fractional vortex.
15 pages, 5 figures, The fourth version of the submission and the final update for arXiv. After this revision, the title is changed two times in a review process. In the first change, the title was "A vortex in a superconducting bilayer where one layer has a hole". The final title is "An unconventional vortex state in a superconducting bilayer where one layer has a hole"
References in corpus (15)
- Observation of half-quantum vortices in topological superfluid 3He
- Dynamics of semifluxons in Nb long Josephson 0-pi junctions
- Magnetic response of mesoscopic superconducting rings with two order parameters
- Fluctuation Superconductivity in Mesoscopic Aluminum Rings
- Deconfinement of Vortices with Continuously Variable Fractions of the Unit Flux Quanta in Two-Gap Superconductors
- Phase textures induced by dc current pairbreaking in multilayer structures and two-gap superconductors
- Stability of fractional vortex states in a two-band mesoscopic superconductor
- Two-dimensional vortex behavior in highly underdoped YBa_2Cu_3O_{6+x} observed by scanning Hall probe microscopy
- Dissociation of vortex stacks into fractional-flux vortices
- Dissociation Transition of a Composite Lattice of Magnetic Vortices in the Flux-Flow Regime of Two-Band Superconductors
- Phase soliton and pairing symmetry of a two-band superconductor: Role of the proximity effect
- Stabilizing fractional vortices in multiband superconductors with periodic pinning arrays
- Distinct magnetic signatures of fractional vortex configurations in multiband superconductors
- Soliton induced critical current oscillations in two-band superconducting bridges
- Fractional Flux Plateau in Magnetization Curve of Multicomponent Superconductor Loop