Presentation Information
[3B05]Emergent spintronic functionalities in strongly correlated oxide heterostructures
*Shinobu Ohya1 (1. Department of Electrical Engineering and Information Systems, The University of Tokyo)
Spintronics promises low-power, multifunctional electronics using electron spin for logic and memory. We explore all-epitaxial, strongly correlated perovskite oxide heterostructures offering high-quality interfaces and emergent functionalities, including strong spin-orbit coupling, ferromagnetism, and topological features. First, planar spin devices based on (La0.67Sr0.33)MnO3 with engineered oxygen vacancies show a giant spin-valve effect (140%), enabled by ballistic spin transport. Second, a two-dimensional electron gas at LaTiO3/SrTiO3 interfaces achieves record spin-to-charge conversion (inverse Edelstein length: 190 nm) via strong Rashba coupling. Third, subtle oxygen octahedral rotations in the Weyl semimetal SrRuO3 generate intrinsic spin Berry curvature, enabling spin-orbit torque switching at ultra-low current density (3.1x106 A/cm2) without heavy metals. These results address key challenges for energy-efficient spintronic devices.