Anisotropic Scattering Rates in the t-t'-U Hubbard Model

Details Anisotropic Scattering Rates in the t-t'-U Hubbard Model Anisotropic Scattering Rates in the t-t'-U Hubbard Model

1997-07-25

arxiv.org/abs/cond-mat/9707267v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages LaTex, 4 postscript-figures included in the text, submitted to Physical Review B (Rap. Comm.)

Scientific paper

We have investigated the evolution of the electronic properties of the t-t'-U Hubbard model with hole doping and temperature. Due to the shape of the Fermi surface, scattering from short wavelength spin fluctuations leads to strongly anisotropic quasi-particle scattering rates at low temperatures near half-filling. As a consequence, significant variations with momenta near the Fermi surface emerge for the spectral functions and the corresponding ARPES signals. This behavior is quite in contrast to the intermediate doping regime and we discuss the possible relevance of our results for the interpretation of photoemission spectra in cuprate superconductors at different hole doping levels.

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