%0 Journal Article
%A Hong, Yan
%A Rose, Marc-André
%A Zhang, Zhaoting
%A Li, Ming
%A Heymann, Lisa
%A He, Suqin
%A Gunkel, Felix
%T Modulating Spin Polarization and Spin-Orbit Interaction by Submonolayer Engineering at La Al O 3 / Sr Ti O 3 Interfaces
%J Physical review applied
%V 18
%N 3
%@ 2331-7019
%C College Park, Md. [u.a.]
%I American Physical Society
%M FZJ-2022-03289
%P 034012
%D 2022
%X Recently, the LaAlO3/SrTiO3 (LAO/STO) interface has been highlighted as a major platform for spintronics, and its fundamental control of spin properties, therefore, becomes a key issue for application of this system. Here, we present a study showing the modulation of magnetic two-dimensional electron gases (2DEGs) with simultaneously enhanced spin-orbit interaction at the interface of LAO/STO by inserting LaCoO3 submonolayers. At first, transport experiments provide evidence that Kondo behavior can be well controlled below about 13 K with the interlayer Co ions contributing as scattering centers. In addition, the systematic variation of the anomalous Hall effect obtained with increasing fraction of interfacial Co concentration below 10 K reveals that the spin polarization of 2DEGs is enhanced via submonolayer insertion. Simultaneously, we also observe an enlarged spin-orbit interaction at the buffered LAO/STO interface, resulting in a remarkably strong field-orientation-dependent magnetoresistance. Such tailored LAO/STO interfaces could potentially contribute to stronger spin-to-charge conversion responses and spin-torque measurements. Our observations indicate the subunit-cell insertion of functional layers to be a suitable route to tailor spin, orbital, and lattice interactions of the interfacial 2DEG, which makes the LAO/STO system an intriguing platform for spintronic applications.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000863103200002
%R 10.1103/PhysRevApplied.18.034012
%U https://juser.fz-juelich.de/record/909618