Fermi Surface of the 2D Hubbard Model at Weak Coupling

Details Fermi Surface of the 2D Hubbard Model at Weak Coupling Fermi Surface of the 2D Hubbard Model at Weak Coupling

1996-10-30

arxiv.org/abs/cond-mat/9610216v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, LaTeX2e, 5 embedded EPS figures, accepted to be published in Z. Phys. B

Scientific paper

10.1007/s002570050318

We calculate the interaction-induced deformation of the Fermi surface in the
two-dimensional Hubbard model within second order perturbation theory. Close to
half-filling, interactions enhance anisotropies of the Fermi surface, but they
never modify the topology of the Fermi surface in the weak coupling regime.

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