Static vs. dynamical mean field theory of Mott antiferromagnets
Strongly Correlated Electrons
2007-08-08 v2
Abstract
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 side bands. Already for intermediate values of the interaction the overall bandwidth is larger than in Hartree-Fock, and the gap is considerably smaller. Such differences survive any renormalization of . Our photoemission experiments for Cr-doped VO show spectra qualitatively well described by dynamical mean field theory.
Keywords
Cite
@article{arxiv.cond-mat/0511442,
title = {Static vs. dynamical mean field theory of Mott antiferromagnets},
author = {G. Sangiovanni and A. Toschi and E. Koch and K. Held and M. Capone and C. Castellani and O. Gunnarsson and S. -K. Mo and J. W. Allen and H. -D. Kim and A. Sekiyama and A. Yamasaki and S. Suga and P. Metcalf},
journal= {arXiv preprint arXiv:cond-mat/0511442},
year = {2007}
}
Comments
6 pages, 5 figures - one figure added and further details about quasiparticle dispersion