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@ARTICLE{Gunnarsson:5502,
      author       = {Gunnarsson, O. and Sangiovanni, G. and Rösch, O. and Koch,
                      E. and Castellani, C. and Capone, M.},
      title        = {{P}olaron formation in cuprates},
      journal      = {Physica / C},
      volume       = {460-462},
      issn         = {0921-4534},
      address      = {Amsterdam},
      publisher    = {North-Holland Physics Publ.},
      reportid     = {PreJuSER-5502},
      pages        = {263 - 266},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We calculate the electron-phonon coupling for La2CuO4, and
                      show that it is strong enough to lead to small polarons, as
                      seen experimentally. The calculated line shapes are in
                      reasonable agreement with experiment. Deriving sum rules, we
                      show that for a weakly doped system, the Coulomb interaction
                      strongly suppresses effects of the electron-phonon
                      interaction on the phonon but not electron self-energy.
                      Studying a Hubbard-Holstein model using a dynamical
                      mean-field theory, we show that it is crucial to include
                      antiferromagnetic correlations. The Coulomb interaction then
                      only moderately suppresses the tendency to polaron
                      formation, while the suppression of the phonon softening is
                      very strong. (C) 2007 Elsevier B,V. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {IFF-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB781},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Physics, Applied},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000249870500073},
      doi          = {10.1016/j.physc.2007.03.022},
      url          = {https://juser.fz-juelich.de/record/5502},
}