Correlated band structure of electron-doped cuprate materials

Strong Correlations

Автор(и)

  • C. Dahnken Institute for Theoretical Physics and Astrophysics, University of Würzburg, am Hubland, Würzburg 97074, Germany
  • M. Potthoff Institute for Theoretical Physics and Astrophysics, University of Würzburg, am Hubland, Würzburg 97074, Germany
  • E. Arrigoni Institute for Theoretical Physics and Computational Physics, Graz University of Technology, Graz, A-8010, Austria
  • W. Hanke Institute for Theoretical Physics and Astrophysics, University of Würzburg, am Hubland, Würzburg 97074, Germany

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.2199448

Ключові слова:

High-Tc superconductivity, cuprate materials, electron correlations.

Анотація

We present a numerical study of the doping dependence of the spectral function of the n-type cuprates. Using a variational cluster-perturbation theory approach based upon the self-energyfunctional theory, the spectral function of the electron-doped two-dimensional Hubbard model is calculated. The model includes the next-nearest neighbor electronic hopping amplitude t' and a fixed on-site interaction U = 8t at half-filling and doping levels ranging from x= 0.077 to x = 0.20. Our results support the fact that a comprehensive description of the single-particle spectrum of electron-doped cuprates requires a proper treatment of strong electronic correlations. In contrast to previous weak-coupling approaches, we obtain a consistent description of the ARPES experiments without the need to (artificially) introduce a doping-dependent on-site interaction U.

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Опубліковано

2006-03-20

Як цитувати

(1)
C. Dahnken, M. Potthoff, E. Arrigoni, and W. Hanke, Correlated band structure of electron-doped cuprate materials: Strong Correlations, Low Temp. Phys. 32, (2006) [Fiz. Nizk. Temp. 32, 602-608, (2006)] DOI: https://doi.org/10.1063/1.2199448.

Номер

Том 32 № 4-5 (2006)

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