The spin susceptibility $\chi(T)$ of strongly correlated Fermi systems is investigated in the density region where Fermi-liquid theory fails. We attribute this failure to a specific quantum phase transition associated with a rearrangement of the Landau state at low temperatures $T$, retaining the assumption that the Landau quasiparticle picture survives in a generic sense. Taking into account the resulting modification of the quasiparticle istribution function, the spin susceptibility $\chi(T)$ is shown to contain a Curie-Weiss component $\chi_{ \rm CW}(T)\sim (T-\Theta_{ \rm W})^{ -1}$, with the Weiss temperature $\Theta_{ \rm W}$ vanishing at the critical density for the transition.
Categories: cond-mat.str-el