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@INPROCEEDINGS{Friedrich:1020285,
      author       = {Friedrich, Christoph},
      title        = {{E}lectron–plasmon and electron–magnon scattering in
                      elementary ferromagnets from first principles: the ${GWT}$
                      self-energy},
      reportid     = {FZJ-2024-00041},
      year         = {2023},
      abstract     = {This work combines two powerful self-energy techniques: the
                      well-known $GW$ method and a self-energy recently developed
                      by us that describes renormalization effects caused by the
                      scattering of electrons with magnons and Stoner excitations.
                      This $GT$ self-energy, which is fully k-dependent and
                      contains infinitely many spin-flip ladder diagrams, was
                      shown to have a profound impact on the electronic band
                      structure of Fe, Co, and Ni. In the present work, we refine
                      the method by combining $GT$ with the $GW$ self-energy. The
                      resulting $GWT$ spectral functions exhibit strong lifetime
                      effects and emergent dispersion anomalies. They are in an
                      overall better agreement with experimental spectra than
                      those obtained with $GW$ or $GT$ alone, even showing partial
                      improvements over local-spin-density approximation dynamical
                      mean-field theory. The performed analysis provides a basis
                      for applying the $GWT$ technique to a wider class of
                      magnetic materials. This work was supported by the European
                      Centre of Excellence MaX “Materials design at the
                      Exascale” (grant no. 824143) funded by the EU. We
                      gratefully acknowledge the computing time granted through
                      JARA-HPC on the supercomputer JURECA at Forschungszentrum
                      Jülich.},
      month         = {Aug},
      date          = {2023-08-07},
      organization  = {HoW exciting! 2023 Workshop, Berlin
                       (Germany), 7 Aug 2023 - 10 Aug 2023},
      subtyp        = {Invited},
      cin          = {PGI-1 / IAS-1},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1020285},
}