Extreme g-factor anisotropy of low mobility 2D hole gas in GaAs/In0.2Ga0.8As/GaAs quantum well

The Shubnikov–de Haas (SdH) oscillations in low-mobility two-dimensional (2D) hole gas in a single quantum well GaAs/In0.2Ga0.8As/GaAs in magnetic fields up to 50 T were investigated. Analyzing the behavior of those oscillations within the framework of highly anisotropic spin splitting of the Landau levels, we obtained the values of the out-of-plane and in-plane g-factor of |g⊥|=4.4±0.6 and |g∥|=0.4±0.1 respectively.