Abstract
We study superconducting properties in multilayer thin films consisting of superconducting La1.85Sr0.15CuO4 (LSCO) and Mott insulator Sr2IrO4 (SIO) and report enhanced superconductivity in the optimized samples. These multilayer heterostructures show an increase in superconducting transition temperature (TC) as compared to the single-layer LSCO films. The temperature dependence of the SIO single layer is also investigated under thermal activation, Arrhenius-type behaviour, and variable-range hopping mechanisms for different temperature regimes. The decrease in TC beyond an optimum thickness of LSCO in these multilayers is analyzed in the framework of a model based on the assumption of induced superconductivity in the SIO-LSCO interface due to the doping of La and/or oxygen deficiencies into the SIO layers.
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