Giant proximity effect in single-crystalline MgB2 bilayers.

ABSTRACT: Although giant proximity effect (GPE) can shed important information on understanding superconducting pairing mechanisms and superconducting electronics, reports on the GPE are few because the fabrication of the junctions with GPE is technologically difficult. Here, we report a GPE in the single-crystalline MgB2 bilayers (S'/S), where the S' is the damaged MgB2 layer by cobalt (Co)-ion irradiation and the S is the undamaged MgB2 layer. Superconducting properties of the S' is remarkably degraded by the irradiation, whereas those of the S is uninfluenced by the irradiation. The degraded superconductivity in the S' is fully recovered by increasing the thickness of undamaged MgB2 layer S despite almost ten times larger thickness ~ 95 nm of S' than the superconducting coherence length ξab(0) ~

SUBMITTER: Jung SG 

PROVIDER: S-EPMC6397212 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature