We investigate spin- and orbital-to-charge conversion phenomena in nonmagnetic materials with broken inversion symmetry, treating the contributions from the Hall effect and the Rashba-Edelstein effect on an equal footing. We develop a general formalism for this interconversion based on macroscopic observables (susceptibility, conductivity, conversion efficiencies). The theory is validated through a case study of ferroelectric $\alpha$-GeTe, where we find that the obtained effective Rashba parameter is smaller than previously reported values for the same material. Incorporating these parameters into a drift-diffusion model, we show that the generated charge current is primarily governed by the Rashba-Edelstein effect, rather than by the spin or orbital Hall effects.

Close

PrevNext

View figure in article

• Rashba coupling
• Spin Hall effect
• Spintronics