  We have investigated the complex two-dimensional electron system with unequal
Rashba and Dresselhaus spin-orbit interactions in the presence of a
perpendicular magnetic field. The spin polarizations are obtained in a wide
range of magnetic fields. It is shown that such a system is hard to be
magnetized. We also find that the resonant charge and spin Hall conductances
occurs simultaneously at a certain magnetic field, at which two (nearly)
degenerate Landau levels are filled partly. The resonant Hall effects are
universal in this type of semiconductor materials, and could have potential
application for semiconductor spintronics.
