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@ARTICLE{Flesch:22914,
      author       = {Flesch, A. and Zhang, G. and Koch, E. and Pavarini, E.},
      title        = {{O}rbital-order melting in rare-earth manganites: {R}ole of
                      superexchange},
      journal      = {Physical review / B},
      volume       = {85},
      number       = {3},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-22914},
      pages        = {035124},
      year         = {2012},
      note         = {We thank I. Loa and K. Syassen for sharing unpublished
                      data. Calculations were done on the Julich Blue Gene/P and
                      Juropa. We acknowledge financial support from the Deutsche
                      Forschungsgemeinschaft through research unit FOR1346.},
      abstract     = {We study the mechanism of orbital-order melting observed at
                      temperature T-OO in the series of rare-earth manganites. We
                      find that the purely electronic many-body super-exchange
                      mechanism yields a transition temperature T-KK that
                      decreases with decreasing rare-earth radius and increases
                      with pressure, opposite to the experimental T-OO. We show
                      that the tetragonal crystal-field splitting reduces T-KK
                      further increasing the discrepancies with experiments. This
                      proves that super-exchange effects, although very efficient,
                      in the light of experimentally observed trends play a minor
                      role for the melting of orbital ordering in rare-earth
                      manganites.},
      keywords     = {J (WoSType)},
      cin          = {PGI-2 / IAS-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-2-20110106 / I:(DE-Juel1)IAS-3-20090406},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000299871800003},
      doi          = {10.1103/PhysRevB.85.035124},
      url          = {https://juser.fz-juelich.de/record/22914},
}