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@ARTICLE{Peters:829697,
      author       = {Peters, L. and Di Marco, I. and Grånäs, O. and
                      Şaşıoğlu, E. and Altun, A. and Rossen, S. and Friedrich,
                      Christoph and Blügel, S. and Katsnelson, M. I. and
                      Kirilyuk, A. and Eriksson, O.},
      title        = {{C}orrelation effects and orbital magnetism of {C}o
                      clusters},
      journal      = {Physical review / B},
      volume       = {93},
      number       = {22},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-03341},
      pages        = {224428},
      year         = {2016},
      abstract     = {Recent experiments on isolated Co clusters have shown huge
                      orbital magnetic moments in comparison with their bulk and
                      surface counterparts. These clusters hence provide the
                      unique possibility to study the evolution of the orbital
                      magnetic moment with respect to the cluster size and how
                      competing interactions contribute to the quenching of
                      orbital magnetism. We investigate here different theoretical
                      methods to calculate the spin and orbital moments of Co
                      clusters, and assess the performances of the methods in
                      comparison with experiments. It is shown that
                      density-functional theory in conventional local density or
                      generalized gradient approximations, or even with a hybrid
                      functional, severely underestimates the orbital moment. As
                      natural extensions/corrections, we considered the orbital
                      polarization correction, the LDA+U approximation as well as
                      the LDA+DMFT method. Our theory shows that of the considered
                      methods, only the LDA+DMFT method provides orbital moments
                      in agreement with experiment, thus emphasizing the
                      importance of dynamic correlations effects for determining
                      fundamental magnetic properties of magnets in the nanosize
                      regime.},
      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)},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000378811500006},
      doi          = {10.1103/PhysRevB.93.224428},
      url          = {https://juser.fz-juelich.de/record/829697},
}