Beating Analysis of Shubnikov de Haas Oscillation in In0.53Ga0.47As Double Quantum Well toward Spin Filter Applications

We recently determined the values of intrinsic spin-orbit (SO) parameters for In 0.52 Al 0.48 As/In 0.53 Ga 0.47 As(10 nm)/In 0.52 Al 0.48 As (InGaAs/InAlAs) quantum wells (QW), lattice-matched to (001) InP, from the weak localization/antilocalization analysis of the low-temperature magneto-conductivity measurements [1]. We have then studied the subband energy spectra for the InGaAs/InAlAs double QW system from beatings in the Shubnikov de Haas (SdH) oscillations. The basic properties obtained here for the double QW system provides useful information for realizing nonmagnetic spin-filter devices based on the spin-orbit interaction [2]. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.