Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session C23: Controlling Magnetism in Oxide Heterostructures II
2:30 PM–5:30 PM,
Monday, March 5, 2018
LACC Room: 402B
Sponsoring Units: GMAG DMP DCOMP
Chair: Yaohua Liu, Oak Ridge National Lab
Abstract: C23.00005 : Spin-to-charge conversion through Rashba coupling in SrTiO3-based two-dimensional electron gases*
3:42 PM–3:54 PM
(Max-Planck-Institut für Mikrostrukturphysik)
The quasi 2D electron system (q2DES) that forms at the interface between LaAlO3 (LAO) and SrTiO3 (STO) has attracted much attention from the oxide electronics community. Among its many low dimensional physical effects, the strong Rashba spin-orbit coupling present at the interface could be exploited for spin-to-charge interconversion, which presents advantages for the future of spintronics. We will present experiments performed on the q2DES formed at NiFe/LAO/STO and NiFe/(metal)/STO heterostructures. We investigating the nature of the inverse Edelstein effect (responsible for the spin-to-charge conversion) through a combination of spin pumping, magnetotransport, spectroscopy and gating experiments. We found a highly efficient spin-to-charge conversion which is tunable by a gate voltage. Results were then interpreted in terms of a crossover between the occupancy of one to several bands with different orbital characters and different spin-orbit textures.
*This work received support from the ERC Consolidator Grant #615759 “MINT”, the région Île-de-France DIM “Oxymore” (project “NEIMO”), the ANR project “NOMILOPS", French Ministry of Higher Education and Research and CNRS.
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