Spin to charge conversion at Rashba-split SrTiO${}_3$ interfaces from resonant tunneling

Abstract

Spin-charge interconversion is a very active direction in spintronics. Yet, the complex behaviour of some of the most promising systems such as SrTiO${}_3$ (STO) interfaces is not fully understood. Here, on the basis of a 6-band $\mathbf{k}.\mathbf{p}$ method combined with spin-resolved scattering theory, we give a theoretical demonstration of transverse spin-charge interconversion physics in STO Rashba interfaces. Calculations involve injection of spin current from a ferromagnetic contact by resonant tunneling into the native Rashba-split resonant levels of the STO triangular quantum well. We compute an asymmetric tunneling electronic transmission yielding a transverse charge current flowing in plane, with a dependence with gate voltage in a very good agreement with existing experimental data.

arXiv comment21 pages, 6 figures

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Cited by in corpus (8)

• Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas
• Phonon-mediated strong coupling between a three-dimensional topological insulator and a two-dimensional antiferromagnetic material
• Theory of the inverse Rashba-Edelstein effect induced by thermal spin injection
• Semiclassical spin transport in LaO/STO system in the presence of multiple Rashba spin orbit couplings
• Duality and degeneracy lifting in two-dimensional electron liquids on SrTiO${}_3$(001)
• Theory of charge-to-spin conversion under quantum confinement
• Tunneling anisotropic spin galvanic effect
• Spin Pumping into two-dimensional systems