Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra: An experimental and theoretical study (Articolo in rivista)

Type
Label
  • Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra: An experimental and theoretical study (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.85.205109 (literal)
Alternative label
  • Sanchez-Barriga J; Braun J; Minar J; Di Marco I; Varykhalov A; Rader O; Boni V; Bellini V; Manghi F; Ebert H; Katsnelson MI; Lichtenstein AI; Eriksson O; Eberhardt W; Durr HA; Fink J (2012)
    Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra: An experimental and theoretical study
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sanchez-Barriga J; Braun J; Minar J; Di Marco I; Varykhalov A; Rader O; Boni V; Bellini V; Manghi F; Ebert H; Katsnelson MI; Lichtenstein AI; Eriksson O; Eberhardt W; Durr HA; Fink J (literal)
Pagina inizio
  • 205109 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Elektronenspeicherring BESSY II, Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany 2. Univ Munich, Dep Chem & Biochem, D-81377 Munich, Germany 3. Dept Phys & Astron, SE-75120 Uppsala, Sweden 4. Univ Modena, Dipartimento Fis, I-41100 Modena, Italy 5. CNR, Inst Nanosci S3, I-41125 Modena, Italy 6. Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands 7. Univ Hamburg, Inst Theoret Phys, D-20335 Hamburg, Germany 8. SLAC Natl Accelerator Lab, Pulse Inst, Menlo Pk, CA 94025 USA 9. SLAC Natl Accelerator Lab, Stanford Inst Energy & Mat Sci, Menlo Pk, CA 94025 USA 10. Leibniz Inst Solid State & Mat Res Dresden, D-01171 Dresden, Germany (literal)
Titolo
  • Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra: An experimental and theoretical study (literal)
Abstract
  • We have investigated the spin-dependent quasiparticle lifetimes and the strength of electron correlation effects in the ferromagnetic 3d transition metals Fe, Co, and Ni by means of spin- and angle-resolved photoemission spectroscopy. The experimental data are accompanied by state-of-the-art many-body calculations within the dynamical mean-field theory and the three-body scattering approximation, including fully relativistic calculations of the photoemission process within the one-step model. Our quantitative analysis reveals that inclusion of local many-body Coulomb interactions are of ultimate importance for a realistic description of correlation effects in ferromagnetic 3d transition metals. However, we found that more sophisticated many-body calculations with larger modifications in the case of Fe and Co are still needed to improve the quantitative agreement between experiment and theory. In general, it turned out that not only the dispersion behavior of energetic structures should be affected by nonlocal correlations but also the line widths of most of the photoemission peaks are underestimated by the current theoretical approaches. The increasing values of the on-site Coulomb interaction parameter U and the band narrowing of majority spin states obtained when moving from Fe to Ni indicate that the effect of nonlocal correlations becomes weaker with increasing atomic number, whereas correlation effects tend to be stronger. (literal)
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