High-frequency spin susceptibility of a two-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 in impurity atoms and the quantizing magnetic field are taken into consideration. The susceptibility has resonant singularities at frequencies of electron transitions between Landau levels and local levels. In the absence of a magnetic field, the real part of susceptibility has a logarithmic singularity while the imaginary part has a peak at the threshold frequency of bound electron activation by a variable magnetic field. (C) 1997 American Institute of Physics.