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Aluminum compounds; Crystals; Electronic properties; Lanthanum compounds; Strontium titanates; Superconductivity; Titanium compounds, Complex oxides; Domain structure; Normal state; Spatially inhomogeneous; Structural domains; Susceptometers, Superconducting transition temperature
Abstract:
The tetragonal domain structure in SrTiO3 (STO) is known to modulate the normal-state carrier density in LaAlO3/SrTiO3 (LAO/STO) heterostructures, among other electronic properties, but the effect of STO domains on the superconductivity in LAO/STO has not been fully explored. Using a scanning SQUID susceptometer microscope to map the superconducting response as a function of temperature in LAO/STO, we find that the superconducting transition temperature is spatially inhomogeneous and modulated in a pattern that is characteristic of structural domains in the STO. © 2018, The Author(s).
