The strength of electronic correlation effects in the spin-dependent electronic structure of ferromagnetic bcc Fe(110) has been investigated by means of spin and angle-resolved photoemission spectroscopy. The experimental results are compared to theoretical calculations within the three-body scattering approximation and within the dynamical mean-field theory, together with one-step model calculations of the photoemission process. This comparison indicates that the present state of the art many-body calculations, although improving the description of correlation effects in Fe, give too small mass renormalizations and scattering rates thus demanding more refined many-body theories including non-local fluctuations.
@article{arxiv.0910.4360,
title = {About the strength of correlation effects in the electronic structure of iron},
author = {J. Sanchez-Barriga and J. Fink and V. Boni and I. Di Marco and J. Braun and J. Minar and A. Varykhalov and O. Rader and V. Bellini and F. Manghi and H. Ebert and M. I. Katsnelson and A. I. Lichtenstein and O. Eriksson and W. Eberhardt and H. A. Duerr},
journal= {arXiv preprint arXiv:0910.4360},
year = {2015}
}