The Rashba–Edelstein length of the investigated material can be compared to other spin-charge interconversion efficiencies, as the spin-Hall angle, to establish if this material is an efficient spin-charge interconverter, and, therefore, if it could be suitable for spintronic applications. The Rashba–Edelstein length (2D spin-charge interconversion efficiency) can be effectively compared to the spin Hall angle (3D spin-charge interconversion efficiency), by dividing the λ λ R E E parameter for the thickness of the spin-splitted surface states in which this 2D conversion occurs. This "equivalent" spin Hall angle for the Rashba–Edelstein effect often results in being close to the unity or even greater than the unity: the Rashba–Edelstein effect, on average, is a more efficient spin-charge interconversion mechanism than the spin Hall effect and this could lead to a future employment of materials displaying this effect in the technological industry.