Static versus dynamical mean-field theory of Mott antiferromagnets
Static versus dynamical mean-field theory of Mott antiferromagnets
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 …