Interplay between in-plane magnetic fields and spin-orbit coupling in InGaAs/InP

摘要

The coupling between the Zeeman splitting and the Rashba spin-orbit interaction, with tilted magnetic fields, has been investigated in a gated (InGa)As/InP quantum well structure. It is demonstrated that the "spin zeroes" in the Shubnikov-de Haas oscillations can be enhanced by tilt and why they are not always present. A simple expression is given that allows the Rashba parameter to be extracted from the position of the spin zeroes in tilted fields. Values of the parameter obtained in this way are in good agreement with those estimated from the width of the weak anti-localisation peak.