Generation of d-wave coupling in the two-dimensional Hubbard model from functional renormalization

Details Generation of d-wave coupling in the two-dimensional Hubbard model from functional renormalization Generation of d-wave coupling in the two-dimensional Hubbard model from functional renormalization

2008-01-11

arxiv.org/abs/0801.1773v2

Phys. Rev. B 79, 094526 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 13 figures, equivalent to published version

Scientific paper

10.1103/PhysRevB.79.094526

Within the two-dimensional repulsive t-t'-Hubbard model, an attractive coupling in the d-wave pairing channel is induced by antiferromagnetic fluctuations. We investigate this coupling using functional renormalization group equations. The momentum dependent d-wave coupling can be bosonized by the use of scale dependent field transformations. We propose an effective coarse grained model for the Hubbard model which is based on the exchange of antiferromagnetic and d-wave collective bosons.

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