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Abstract:
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. (c) 2006 WILEY-VCH Verlag GmbH
& Co. KGaA, Weinheim.
