HIGH-FREQUENCY SPIN SUSCEPTIBILITY OF A 2-DIMENSIONAL ELECTRON-GAS WITH ELECTRON IMPURITY STATES

The high-frequency asymptotic form of dynamic spin susceptibility of a two-dimensional electron gas is obtained. Local states of electrons i n impurity atoms and the quantizing magnetic field are taken into cons ideration. The susceptibility has resonant singularities at frequencie s of electron transitions between Landau levels and local levels. In t he absence of a magnetic field, the real part of susceptibility has a logarithmic singularity while the imaginary part has a peak at the thr eshold frequency of bound electron activation by a variable magnetic f ield. (C) 1997 American Institute of Physics.