Magnetotransport in C-doped AlGaAs heterostructures
B. Grbic, C. Ellenberger, T. Ihn, K. Ensslin, D. Reuter, A. D. Wieck
Abstract
High-quality C-doped p-type AlGaAs heterostructures with mobilities exceeding 150 000 cm2/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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