Quantum Hall effect and Shubnikov–de Haas oscillations in a high-mobility p -type PbTe quantum well

We present here the magnetotransport experiment performed with a magnetic field up to 30 T on a 10 nm-wide $p$-type PbTe quantum well. Pronounced Shubnikov--de Haas oscillations and the integer quantum Hall effect are clearly observed, demonstrating the transport of a confined two-dimensional hole gas with negligible parallel conduction at low temperatures. The sequence of filling factors can be explained by considering the magnetic field evolution of Landau levels derived from two longitudinal and one oblique occupied subbands and taking Zeeman spin splitting into account. During illumination, the total carrier density of the system is raised by 15%, which leads to a plateau sequence in the integer quantum Hall effect with higher filling factors in comparison to the dark condition.