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

Abstract

The two-dimensional electron gas formed at interfaces between SrTiO${}_3$ and other materials has attracted much attention since extremely efficient spin-to-charge current conversion has been recently observed at these interfaces. This has been attributed to their complicated quantized multi-orbital structures with a topological feature. However, there are few reports quantitatively comparing the conversion efficiency values between experiments and theoretical calculations at these interfaces. In this study, we theoretically explain the experimental temperature dependence of the spin-to-charge current conversion efficiency using an 8x8 effective tight-binding model considering the second $d_{xy}$ subband, revealing the vital role of the quantization of the multi-band structure.

15 pages, 5 fugures

References in corpus (7)

• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Observation of Inverse Edelstein Effect in Rashba-Split 2DEG between SrTiO3 and LaAlO3 at Room Temperature
• Spin and orbital Edelstein effect in an oxide two-dimensional electron gas: theory and application to AlO${}_x$/SrTiO${}_3$
• Theory of the spin galvanic effect at oxide interfaces
• Spin galvanic effect at the conducting SrTiO3 surfaces
• Spin texture driven spintronic enhancement at the LaAlO${}_3$/SrTiO${}_3$ interface

Cited by in corpus (1)

• Semiclassical spin transport in LaO/STO system in the presence of multiple Rashba spin orbit couplings