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High-quality C-doped p-type AlGaAs heterostructures with mobilities exceeding 150000cm2∕Vs are investigated by low-temperature magnetotransport experiments. We find features of the fractional quantum Hall effect as well as a highly resolved Shubnikov–de Haas oscillations at low magnetic fields. This allows us to determine the densities, effective masses, and mobilities of the holes populating the spin-split subbands arising from the lack of inversion symmetry in these structures.
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Grbić et al. (2004) studied this question.
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