Zeeman Spin-Splitting in the (010) $β$-Ga2O3 Two-Dimensional Electron Gas

Through magneto-transport measurements and analysis of the observed Shubnikov de Haas oscillations in (010) (AlxGa1-x)2O3/Ga2O3 heterostructures, spin-splitting of the Landau levels in the (010) Ga2O3 two-dimensional electron gas (2DEG) has been studied. Analysis indicates that the spin-splitting results from the Zeeman effect. By fitting the both the first and second harmonic of the oscillations as a function of magnetic field, we determine the magnitude of the Zeeman splitting to be 0.4$\hbarω_c$, with a corresponding effective g-factor of 2.7, for magnetic field perpendicular to the 2DEG.