Anomalous Behavior of the Spin Susceptibility of Strongly Correlated Fermi Systems

Clark, J. W.; Khodel, V. A.; Zverev, M. V.

Anomalous Behavior of the Spin Susceptibility of Strongly Correlated Fermi Systems

Authors

Clark, J. W.

Khodel, V. A.

Zverev, M. V.

Description

The spin susceptibility $χ(T)$ 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 $χ(T)$ is shown to contain a Curie-Weiss component $χ_{\rm CW}(T)\sim (T-Θ_{\rm W})^{-1}$, with the Weiss temperature $Θ_{\rm W}$ vanishing at the critical density for the transition.
4 pages, 3 figures