2009/04/13 by G. Koren, Koren, G., Oded Millo +2
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconducting Materials and Applications #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.0904.1928
4 figures
arxiv created 2009/04/13 · openalex publication_date 2009/04/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Following a recent study by our group in which a large Tc enhancement was reported in bilayers of the non-superconducting La1.65Sr0.35CuO4 and superconducting La1.88Sr0.12CuO4 films [Phys. Rev. Lett. 101, 057005 (2008)], we checked if a similar effect occurs when superconducting La1.88Sr0.12CuO4 islands are coated with a continuous layer of the non superconducting La1.65Sr0.35CuO4. We found that no such phenomenon is observed. The bare superconducting islands film behaves as an insulator where transport occurs via hopping or tunneling between islands, but exhibits a weak signature of localized superconductivity at ∼18 K. When over coated with a La1.65Sr0.35CuO4 film, it becomes superconducting with a Tc onset of 16.6 K, which is less than that of a thick La1.88Sr0.12CuO4 film (25.7 K). We therefore conclude that the lower Tc in the bilayer is due to a conventional proximity effect.