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cond-mat.str-el2002★ 1 cited
Superconductivity and Instabilities in the t-t' Hubbard Model
F. Wegner, V. Hankevych
We present a stability analysis of the 2D t-t' Hubbard model on a square lattice for t' = -t/6. We find possible phases of the model (d-wave Pomeranchuk and superconducting states,…
cond-mat.str-el2001
Stability Analysis of the Hubbard-Model
I. Grote, E. Koerding, F. Wegner
An effective Hartree-Fock-Bogoliubov-type interaction is calculated for the Hubbard-model in second order in the coupling by means of flow-equations. A stability analysis is perfor…