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.
Strength of Correlation Effects in the Electronic Structure of Iron / J., S.B., J., F., Boni, V., I., D.M., J., B., J., M., A., V., O., R., V., B., Manghi, F., H., E., M. I., K., A. I., L., O., E., W., E., H. A., D.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 103:(2009), pp. 267203-267207. [10.1103/PhysRevLett.103.267203]
Strength of Correlation Effects in the Electronic Structure of Iron
BONI, VALENTINA;MANGHI, Franca;
2009
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.
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