Proximity effect in cuprate based superconductor-normal metal-superconductor junctions

We report the Josephson coupling between optimally doped superconducting La1.85Sr0.15CuO4 through the normal metal barrier of La1.85Sr0.15Cu0.97Co0.03O4 (LSCCO). The critical current (Ic) across the junction exists even up to a barrier thickness of 50 nm. The barrier thickness dependence study of Ic...

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Bibliographic Details
Main Authors: Rout, P K, Rakshit, R K, Budhani, R C
Format: Conference Proceeding
Language:English
Subjects:
Barriers
Coherence length
Critical current (superconductivity)
Dependence
Proximity effect (electricity)
Superconductor junctions
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Summary:We report the Josephson coupling between optimally doped superconducting La1.85Sr0.15CuO4 through the normal metal barrier of La1.85Sr0.15Cu0.97Co0.03O4 (LSCCO). The critical current (Ic) across the junction exists even up to a barrier thickness of 50 nm. The barrier thickness dependence study of Ic yields a large coherence length in LSCCO of (15.2±1.4) nm at 5 K, which indicates the presence of giant proximity effect in such systems.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4873019