Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of La0.67Sr0.33MnO3/LaAlO3/SrTiO3

Abstract

We demonstrate efficient intrinsic spin-to-charge current conversion in a two-dimensional electron gas using an all-epitaxial single-crystal heterostructure of LaSrMnO3/ LaAlO3 (LAO)/ SrTiO3 (STO), which can suppress spin scattering and give us an ideal environment to investigate intrinsic spin-charge conversion. With decreasing temperature to 20 K, the spin-to-charge conversion efficiency is drastically enhanced to +3.9 nm, which is the largest positive value ever reported for LAO/STO. Our band-structure calculation well reproduces this behavior and predicts further enhancement by controlling the density and relaxation time of the carriers.

13 pages, 4 figures + Supplemental Material

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Cited by in corpus (12)

• Oxide spin-orbitronics: spin-charge interconversion and topological spin textures
• Spin-charge interconversion in KTaO${}_3$ two-dimensional electron gases
• Metal/SrTiO${}_3$ two-dimensional electron gases for spin-to-charge conversion
• Spin-current-related magnetoresistance in epitaxial Pt/Co bilayers in the presence of spin Hall effect and Rashba-Edelstein effect
• Giant spin torque efficiency in naturally oxidized polycrystalline TaAs thin films
• Spin to charge conversion at Rashba-split SrTiO${}_3$ interfaces from resonant tunneling
• Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas
• Theory of the inverse Rashba-Edelstein effect induced by thermal spin injection
• Theoretical analysis of the inverse Edelstein effect at the LaAlO${}_3$ / SrTiO${}_3$ interface with an effective tight-binding model: Important role of the second $d_{xy}$ subband
• Interfacial spin-orbit-coupling-induced strong spin-to-charge conversion at an all-oxide ferromagnetic /quasi-two-dimensional electron gas interface
• Spin Pumping into two-dimensional systems
• Magnetism and nonlinear charge transport in NiFe2O4/γ-Al2O3/SrTiO3 heterostructure: Toward Spintronic Applications