Modulation of superconducting transition temperature in LaAlO3/SrTiO3 by SrTiO3 structural domains

Program Document · Mon Jan 01 00:00:00 EST 2018

OSTI ID:1438181

Noad, Hilary ^[1]; Moler, Kathryn ^[1]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)

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.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1438181
• Country of Publication: United States
• Language: English

Related Subjects

superconductivity
complex oxide heterostructures
transition temperature
structural domains