Spin Splitting in In_0.53Ga_0.47As/InP Heterostructures

Spin-orbit coupling in a gate-controlled In_0.53Ga_0.47As/InP quantum well is
investigated in the presence of a large Zeeman effect. We develop a Fourier-transform fitting procedure to extract the zero-field spin-splitting Rashba parameter α. The bare g factor value is found to be of the order of 3 from magnetotransport measurements in tilted magnetic fields. It is found that both Zeeman splitting and Rashba splitting play important roles in determining the total spin splitting in In_0.53Ga_0.47As.