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