Zolfl, MB and Maier, T and Pruschke, T and Keller, J (2000) Electronic properties of CuO2-planes: A DMFT study. EUROPEAN PHYSICAL JOURNAL B, 13 (1). pp. 47-53. ISSN 1434-6028,
Full text not available from this repository.Abstract
We study one-particle spectra and the electronic band-structure of a CuO2-plane within the three-band Hubbard model. The Dynamical Mean-Field Theory (DMFT) is used to solve the many particle problem. The calculations show that the optical gap Delta(opt) is given by excitations from the lower Hubbard band into the so called Zhang-Rice singlet band. The optical gap Delta(opt) turns out to be considerably smaller than the bare charge transfer energy Delta (Delta = epsilon(p) - epsilon(d)) for atypical set of parameters, which is in agreement with experiment. We also investigate the dependence of the shape of the Fermi surface on the different hopping parameters t(CuO) and t(OO). A value t(OO)/t(CuO) > 0 leads to a Fermi surface surrounding the M point.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-TC SUPERCONDUCTIVITY; MEAN-FIELD THEORY; FERMI-SURFACE; DIMENSIONS; PEROVSKITES; TRANSITION; SYSTEMS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Joachim Keller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 18 May 2021 05:48 |
| Last Modified: | 18 May 2021 05:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42949 |
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