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@ARTICLE{Mller:864056,
      author       = {Müller, Mathias C. T. D. and Blügel, Stefan and
                      Friedrich, Christoph},
      title        = {{E}lectron-magnon scattering in elementary ferromagnets
                      from first principles: {L}ifetime broadening and band
                      anomalies},
      journal      = {Physical review / B},
      volume       = {100},
      number       = {4},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2019-03965},
      pages        = {045130},
      year         = {2019},
      abstract     = {We study the electron-magnon scattering in bulk Fe, Co, and
                      Ni within the framework of many-body perturbation theory
                      implemented in the full-potential linearized
                      augmented-plane-wave method. To this end, a k-dependent
                      self-energy (GT self-energy) describing the scattering of
                      electrons and magnons is constructed from the solution of a
                      Bethe-Salpeter equation for the two-particle (electron-hole)
                      Green function, in which single-particle Stoner and
                      collective spin-wave excitations (magnons) are treated on
                      the same footing. Partial self-consistency is achieved by
                      the alignment of the chemical potentials. The resulting
                      renormalized electronic band structures exhibit strong
                      spin-dependent lifetime effects close to the Fermi energy,
                      which are strongest in Fe. The renormalization can give rise
                      to a loss of quasiparticle character close to the Fermi
                      energy, which we attribute to electron scattering with
                      spatially extended spin waves. This scattering is also
                      responsible for dispersion anomalies in conduction bands of
                      iron and for the formation of satellite bands in nickel.
                      Furthermore, we find a band anomaly at a binding energy of
                      1.5 eV in iron, which results from a coupling of the
                      quasihole with single-particle excitations that form a peak
                      in the Stoner continuum. This band anomaly was recently
                      observed in photoemission experiments. On the theory side,
                      we show that the contribution of the Goldstone mode to the
                      GT self-energy is expected to (nearly) vanish in the
                      long-wavelength limit. We also present an in-depth
                      discussion about the possible violation of causality when an
                      incomplete subset of self-energy diagrams is chosen},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) / 143 -
                      Controlling Configuration-Based Phenomena (POF3-143) /
                      Optoelectronic properties of materials for photovoltaic and
                      photonic applications $(jpgi10_20181101)$},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143 /
                      $G:(DE-Juel1)jpgi10_20181101$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000476688000006},
      doi          = {10.1103/PhysRevB.100.045130},
      url          = {https://juser.fz-juelich.de/record/864056},
}