2005/11/30 by G. Sangiovanni, Giorgio Sangiovanni, A. Toschi +17 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.73.205121
published as Phys. Rev. B 73, 205121 (2006) · 6 pages, 5 figures - one figure added and further details about quasiparticle dispersion
openalex publication_date 2006/05/31 · arxiv created 2006/06/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/02
Studying the antiferromagnetic phase of the Hubbard model by dynamical mean-field theory, we observe striking differences with static (Hartree-Fock) mean field: The Slater band is strongly renormalized and spectral weight is transferred to spin-polaron sidebands. Already for intermediate values of the interaction U the overall bandwidth is larger than in the Hartree-Fock mean field and the gap is considerably smaller. Such differences survive any renormalization of U. Our photoemission experiments for Cr-doped V2O3 show spectra qualitatively well described by dynamical mean-field theory.