  The effect of a weak electrical modulation on spin Hall resonance is
presented here. In presence of the magnetic field normal to the plane of the
motion of electron, the Landau levels are formed which get broadened due to the
weak modulation. The width of the Landau levels broadening are periodic with
the inverse magnetic field. There is a certain magnetic field for which the
crossing of Landau levels between spin-up and spin-down branches takes place.
This gives rise to the resonance in the spin Hall conductivity (SHC). The
Landau levels broadening or the energy correction due to the modulation removes
the singularity appears at the resonance field in SHC, leading to the
suppression of SHC accompanied by two new peaks around this point. The
separation of these two peaks increases with the increase of the modulation
period. Moreover, we find that the height of the two peaks are also modulation
period dependent.
