Strain-induced large spin splitting and persistent spin helix at LaAlO${}_3$/SrTiO${}_3$ interface

Abstract

We investigated the effect of the tensile strain on the spin splitting at the n-type interface in LaAlO${}_3$/SrTiO${}_3$ in terms of the spin-orbit coupling coefficient $\alpha$ and spin texture in the momentum space using first-principles calculations. We found that the $\alpha$ could be controlled by the tensile strain and be enhanced up to 5 times for the tensile strain of 7%, and the effect of the tensile strain leads to a persistent spin helix, which has a long spin lifetime. These results support that the strain effect on LaAlO${}_3$/SrTiO${}_3$ is important for various applications such as spinFET and spin-to-charge conversion.

arXiv comment3 pages, 3 figures, corrected typographical errors and misleading expressions

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Cited by in corpus (10)

• Persistent spin texture enforced by symmetry
• Intrinsic persistent spin helix in two-dimensional group-IV monochalcogenide MX (M : Sn, Ge; X: S, Se, Te) monolayer
• Doping-induced persistent spin helix with large spin splitting in monolayer SnSe
• Persistent Spin Helix Manipulation by Optical Doping of a CdTe Quantum Well
• Spin splitting with persistent spin textures induced by the line defect in 1T-phase of monolayer transition metal dichalcogenides
• Strain engineering a persistent spin helix with infinite spin lifetime
• Emergence of Rashba spin valley state in two-dimensional strained bismuth oxychalcogenides Bi${}_2$O${}_2$Se
• Accidental persistent spin textures in the proustite mineral family
• Persistent Spin Textures in Nonpolar Chiral Systems
• First-principles Study of Rashba Spin Splitting at Strained SrTiO3(001) Surfaces