Tilted magnetic field quantum magnetotransport in the double quantum well with a sizable bulk g-factor: InxGa1−xAs/GaAs

Rich patterns of transformations in the structure of quantum Hall (QH) effect and magnetoresistivity under tilted magnetic fields were obtained in the InxGa1−xAs/GaAs double quantum well at mK temperatures. Local features correspond to the calculated intersections of Landau levels from different subbands and are due to the sharp motion of their crossing points with parallel field component. An incipient quenching with parallel field of the filling factor ν=3 QH state is revealed, which should be due to suppression of the interlayer connection. The observed peculiar monotonous shift in perpendicular fields with increasing in-plain field of the peak between QH states ν=1 and 2 as well as an unusual minimum on some QH plateaus are probably beyond the single particle treatment.