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Temperature Dependence Of The Spectral Properties For 2-D Hubbard Model With Anisotropic Hopping

The temperature dependence of the spectral properties and of the Fermi surface of hole-doped 2-D Hubbard model with anisotropic nearest-neighbor hopping is evaluated using the perturbation theory. The anomalous spectral features are mainly due to the proximity of van Hove singularities to the Fermi energy.

Hubbard model; anisotropic hopping; spectral function

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