BOSE FLUCTUATIONS AND PARAMAGNETIC-SUSCEPTIBILITY OF NORMAL 2D METAL WITH ATTRACTION BETWEEN CARRIERS - SPIN GAP

The paramagnetic susceptibility of a 2D metal with attraction between charge carriers is obtained, proceeding from the simple theoretical fi eld model. The temperature dependence of the magnetic susceptibility i s calculated for various concentrations of fermions. It is shown that the paramagnetic susceptibility can be reduced significantly in view o f the presence of a finite number of decoupling fermion pairs in the n ormal phase. The relation of the proposed model to the marginal behavi or of the Fermi liquid in high-T-c, superconductors, in particular, wi th the effects associated with the formation of a spin gap, is conside red. (C) 1997 American Institute of Physics.