Magnetic and superconducting correlations in the two-dimensional Hubbard model

Details Magnetic and superconducting correlations in the two-dimensional Hubbard model Magnetic and superconducting correlations in the two-dimensional Hubbard model

2005-09-15

arxiv.org/abs/cond-mat/0509412v1

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages, 10 figures

Scientific paper

10.1002/pssb.200562445

The interplay and competition of magnetic and superconducting correlations in the weakly interacting two-dimensional Hubbard Model is investigated by means of the functional renormalization group. At zero temperature the flow of interactions in one-loop approximation evolves into a strong coupling regime at low energy scales, signalling the possible onset of spontaneous symmetry breaking. This is further analyzed by a mean-field treatment of the strong renormalized interactions which takes into account magnetic and superconducting order simultaneously. The effect of strong correlations on single-particle properties in the normal phase is studied by calculating the flow of the self-energy.

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