6533b858fe1ef96bd12b654d
RESEARCH PRODUCT
Change of the vortex core structure in two-band superconductors at the impurity-scattering-driven s±/s++ crossover
Egor BabaevJulien GaraudMikhail Silaevsubject
SuperconductivityPhysicsCondensed matter physicsta114ScatteringCrossovermultiband superconductivityOrder (ring theory)vortices in superconductors02 engineering and technologySingular point of a curve021001 nanoscience & nanotechnology01 natural sciencesVortexImpurityCondensed Matter::Superconductivityimpurities in superconductors0103 physical sciencess-wave010306 general physics0210 nano-technologyLine (formation)description
We report a nontrivial transition in the core structure of vortices in two-band superconductors as a function of interband impurity scattering. We demonstrate that, in addition to singular zeros of the order parameter, the vortices there can acquire a circular nodal line around the singular point in one of the superconducting components. It results in the formation of the peculiar ``moat''-like profile in one of the superconducting gaps. The moat-core vortices occur generically in the vicinity of the impurity-induced crossover between ${s}_{\ifmmode\pm\else\textpm\fi{}}$ and ${s}_{++}$ states.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-10-06 | Physical Review B |