1996/12/18 by Raymond Fresard, Raymond Frésard, Gabriel Kotliar · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Degenerate energy levels #Ferromagnetism #Hubbard model #Magnetism in coordination complexes #Mott transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Transition (genetics) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.56.12909
published as Phys. Rev. B, 56 (1997) 12909 · 5 pages, revtex, 5 postscript figures, submitted to Phys. Rev. B
arxiv created 1996/12/18 · openalex publication_date 1997/11/15 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A slave-boson representation for the degenerate Hubbard model is introduced. The location of the metal-to-insulator transition that occurs at commensurate densities is shown to depend weakly on the band degeneracy M. The relative weights of the Hubbard subbands depend strongly on M, as well as the magnetic properties. It is also shown that a sizable Hund's rule coupling is required in order to have a ferromagnetic instability appearing. The metal-to-insulator transition driven by an increase in temperature is a strong function of it.