HOMOGENEOUS - INHOMOGENEOUS TRANSITIONS IN A LANDAU-LEVEL WITH SPIN SPLITTING

The homogeneous-inhomogeneous transitions of a two-dimensional electro n gas in a strong perpendicular magnetic field are studied in the part icular case when half of the states in a spin splitted Landau level ar e occupied. To this end the dielectric susceptibility in the homogeneo us states as well as the free energy in the modulated states are calcu lated. Unless the g factor dos not exceed a certain value the charge-d ensity waves are stable in an interval of finite temperatures.