Modulation of Superconducting Transition Temperature in LaAlO{sub 3}/SrTiO{sub 3} by SrTiO{sub 3} Structural Domains

Journal Article · Mon Apr 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4730-8· OSTI ID:22921346

Noad, Hilary ^[1]; Wittlich, Pascal; Mannhart, Jochen ^[2]; Moler, Kathryn A. ^[1]

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1. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory (United States)
2. Max Planck Institute for Solid State Research (Germany)

The tetragonal domain structure in SrTiO{sub 3} (STO) is known to modulate the normal-state carrier density in LaAlO{sub 3}/SrTiO{sub 3} (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.

• OSTI ID: 22921346
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 4 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINATES
CARRIER DENSITY
DOMAIN STRUCTURE
LANTHANUM COMPOUNDS
MODULATION
SQUID DEVICES
STRONTIUM TITANATES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE