Universal scaling of the self-field critical current in superconductors: from sub-nanometre to millimetre size.

ABSTRACT: Universal scaling behaviour in superconductors has significantly elucidated fluctuation and phase transition phenomena in these materials. However, universal behaviour for the most practical property, the critical current, was not contemplated because prevailing models invoke nucleation and migration of flux vortices. Such migration depends critically on pinning, and the detailed microstructure naturally differs from one material to another, even within a single material. Through microstructural engineering there have been ongoing improvements in the field-dependent critical current, thus illustrating its non-universal behaviour. But here we demonstrate the universal size scaling of the self-field critical current for any superconductor, of any symmetry, geometry or band multiplicity. Key

SUBMITTER: Talantsev EF 

PROVIDER: S-EPMC5577115 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature