Summary
We present a numerical study of the doping dependence of the spectral function of the n-type cuprates. Using cluster-perturbation theory and the self-energy-functional approach, we calculate the spectral function of the Hubbard model with next-nearest neighbor electronic hopping amplitude t′ = -0.35t and on-site interaction U = 8t at half filling and doping levels ranging from x = 0.077 to x = 0.20. We show that a comprehensive description of the single particle spectrum of the electron doped cuprates is only possible within a strongly correlated model. Weak coupling approaches that are based upon a collapse of the Mott gap by vanishing on-site interaction U are ruled out.
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Dahnken, C., Potthoff, M., Arrigoni, E., Hanke, W. (2006). Electron-doping Evolution of the Quasiparticle Band of the Cuprates. In: Nagel, W.E., Resch, M., Jäger, W. (eds) High Performance Computing in Science and Engineering’ 05. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-29064-8_3
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DOI: https://doi.org/10.1007/3-540-29064-8_3
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