Magnetic and superconducting correlations in the two-dimensional Hubbard model

Metzner, W.; Reiss, J.; Rohe, D.

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Magnetic and superconducting correlations in the two-dimensional Hubbard model

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Metzner, W.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Reiss, J.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Rohe, D.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Metzner, W., Reiss, J., & Rohe, D. (2006). Magnetic and superconducting correlations in the two-dimensional Hubbard model. physica status solidi (b), 243(1), 46-56.

Cite as: https://hdl.handle.net/21.11116/0000-000F-02C9-C

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.