{
  "id": "cond-mat/9707051",
  "version": "v1",
  "published": "1997-07-04T15:54:05.000Z",
  "updated": "1997-07-04T15:54:05.000Z",
  "title": "Possible explanation for the absence of bilayer splitting in YBCO",
  "authors": [
    "H. Monien",
    "N. Elstner",
    "A. J. Millis"
  ],
  "comment": "4 pages, RevTeX, 4 eps figures",
  "categories": [
    "cond-mat.str-el"
  ],
  "abstract": "It has been claimed that the absence of the bilayer splitting in the high-temperature superconductor YBCO is a strong experimental indication that there are no coherent quasiparticles present in the CuO planes. We study a pair of strongly correlated planes which are connected by a hopping transfer integral $t_{\\perp}$ in the limit of large in-plane coordination number. The effect of the correlation is incorporated in a dynamical mean-field theory, where the Weiss field is determined by a two-site Hubbard Hamiltonian. We have solved this problem by numerical techniques and present results for the spectral function $\\rho$ for relevant parameters of the model. For small $t_{\\perp}$ we find the coherent hoping between planes to be proportional to the in-plane quasiparticle renormalisation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-07-04T15:54:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "bilayer splitting",
      "explanation",
      "large in-plane coordination number",
      "in-plane quasiparticle renormalisation",
      "two-site hubbard hamiltonian"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "1997cond.mat..7051M"
    }
  }
}