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Linking Dopant Distribution and Interatomic Distortions at La 1.6 Mo.4CuO 4 /La2CuO4 Superconducting Interfaces

The crystal structures of complex oxide materials are highly adaptable to changes in composition and this compatibility provides the opportunity of synthesizing them in different forms, such as ultrathin films and/or heterostructures. Oxide heterostructures exhibit remarkable electronic properties which do not exist in bulk forms and the emergent phenomena occurring at the interfaces are impressive [1]. One of the exciting interface effect is high temperature interfacial superconductivity discovered in heterostructures consisting of an insulating La2CuO4 (LCO) and metallic La1.55Sr0.45CuO4 (LSCO) layers, while neither of these layers is superconducting [2].