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Modulation of Superconducting Transition Temperature in LaAlO3SrTiO3 by SrTiO3 Structural Domains

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Noad,  Hilary
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Noad, H., Wittlich, P., Mannhart, J., & Moler, K. A. (2019). Modulation of Superconducting Transition Temperature in LaAlO3SrTiO3 by SrTiO3 Structural Domains. Journal of Superconductivity and Novel Magnetism, 32(4), 821-825. doi:10.1007/s10948-018-4730-8.


Cite as: http://hdl.handle.net/21.11116/0000-0003-C860-F
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).