title: Strength of correlation effects in the electronic structure of iron.
abstract: 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 nonlocal fluctuations.
authors.affiliation: Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Sánchez-Barriga
authors.forename: J
authors.initials: J
authors.lastname: Fink
authors.forename: V
authors.initials: V
authors.lastname: Boni
authors.forename: I
authors.initials: I
authors.lastname: Di Marco
authors.forename: J
authors.initials: J
authors.lastname: Braun
authors.forename: J
authors.initials: J
authors.lastname: Minár
authors.forename: A
authors.initials: A
authors.lastname: Varykhalov
authors.forename: O
authors.initials: O
authors.lastname: Rader
authors.forename: V
authors.initials: V
authors.lastname: Bellini
authors.forename: F
authors.initials: F
authors.lastname: Manghi
authors.forename: H
authors.initials: H
authors.lastname: Ebert
authors.forename: M I
authors.initials: MI
authors.lastname: Katsnelson
authors.forename: A I
authors.initials: AI
authors.lastname: Lichtenstein
authors.forename: O
authors.initials: O
authors.lastname: Eriksson
authors.forename: W
authors.initials: W
authors.lastname: Eberhardt
authors.forename: H A
authors.initials: HA
authors.lastname: Dürr