Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">L</mml:mi><mml:msub><mml:mi mathvariant="normal">a</mml:mi><mml:mrow><mml:mn>0.67</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:msub><mml:mi mathvariant="normal">r</mml:mi><mml:mrow><mml:mn>0.33</mml:mn></mml:mrow></mml:msub><mml:mi>Mn</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:mi>LaAl</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow><mml:mo>/</mml:mo><mml:mrow><mml:mi>SrTi</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Shinobu Ohya, Daisei Araki, Le Duc Anh, Shingo Kaneta, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka
Abstract
This paper demonstrates intrinsic spin-to-charge current conversion in a two-dimensional electron gas using an all-epitaxial single-crystal heterostructure of LaSrMnO${}_{3}$/ LaAlO${}_{3}$ (LAO)/ SrTiO${}_{3}$ (STO), known to suppress spin scattering. As temperature decreases to 20 K, the spin-to-charge conversion efficiency is enhanced. The authors complement their experiments with band-structure calculation that agree with the observations and predict further enhancement by controlling the density and relaxation time of the carriers.
Topics & Concepts
HeterojunctionMaterials scienceCurrent (fluid)OptoelectronicsCurrent densityCondensed matter physicsEnergy conversion efficiencyComplement (music)Relaxation (psychology)ElectronPhysicsElectronic and Structural Properties of OxidesMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics