Abstract
We determine the effective g-factor () of a two-dimensional electron gas (2DEG) using a new method based on capacitance spectroscopy. The capacitance-voltage profile of a 2DEG in an InAs/AlGaSb quantum well measured in an in-plane magnetic field shows a double-step feature that indicates the Zeeman splitting of the subband edge. The method allows for simultaneous and independent determination of and effective mass . Data suggests that the biaxial tensile strain in the InAs layer has considerable impact on both and . Our method provides a means to determine that is complementary to the commonly used coincidence technique.
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