biostudies-literatureUnknown7Yabuki NSupercurrent flow between two superconductors with different order parameters, a phenomenon known as the Josephson effect, can be achieved by inserting a non-superconducting material between two superconductors to decouple their wavefunctions. These Josephson junctions have been employed in fields ranging from digital to quantum electronics, yet their functionality is limited by the interface quality and use of non-superconducting material. Here we show that by exfoliating a layered dichalcogenide (NbSe2) superconductor, the van der Waals (vdW) contact between the cleaved surfaces can instead be used to construct a Josephson junction. This is made possible by recent advances in vdW heterostructure technology, with an atomically flat vdW interface free of oxidation and inter-diffusion achieNature communications10616https://www.ebi.ac.uk/biostudies/studies/S-EPMC4740878biostudies-literatureSupercurrent in van der Waals Josephson junction.PMC4740878Morikawa SYabuki NMoriya RArai MSata YMasubuchi SMachida TfalseSupercurrent in van der Waals Josephson junction.Supercurrent flow between two superconductors with different order parameters, a phenomenon known as the Josephson effect, can be achieved by inserting a non-superconducting material between two superconductors to decouple their wavefunctions. These Josephson junctions have been employed in fields ranging from digital to quantum electronics, yet their functionality is limited by the interface quality and use of non-superconducting material. Here we show that by exfoliating a layered dichalcogenide (NbSe2) superconductor, the van der Waals (vdW) contact between the cleaved surfaces can instead be used to construct a Josephson junction. This is made possible by recent advances in vdW heterostructure technology, with an atomically flat vdW interface free of oxidation and inter-diffusion achie2016-01-01T00:00:00Z2016 Feb2025-04-18T16:30:15.154Z2019-03-27T02:08:21ZS-EPMC47408782683075410.1038/ncomms10616