Spin degrees of freedom and flattening of the spectra of single-particle excitations in strongly correlated Fermi systems

V. A. Khodel, P. Schuck, M. V. Zverev

The impact of long-range spin-spin correlations on the structure of a flat portion in single-particle spectra $\xi (p)$, which emerges beyond the point, where the Landau state loses i…