TU Berlin

Numerische FluiddynamikPublications

Page Content

to Navigation

Search

Search for publications




Publications

Renormalized mean-field analysis of antiferromagnetism and d-wave superconductivity in the two-dimensional Hubbard model
Citation key ReissRoheMetzner2007
Author Reiss, J. and Rohe, D. and Metzner, W.
Pages 075110
Year 2007
DOI 10.1103/PhysRevB.75.075110
Journal Phys. Rev. B
Volume 75
Month Feb
Publisher American Physical Society
Abstract We analyze the competition between antiferromagnetism and superconductivity in the two-dimensional Hubbard model by combining a functional renormalization group flow with a mean-field theory for spontaneous symmetry breaking. Effective interactions are computed by integrating out states above a scale ΛMF in one-loop approximation, which captures in particular the generation of an attraction in the d-wave Cooper channel from fluctuations in the particle-hole channel. These effective interactions are then used as an input for a mean-field treatment of the remaining low-energy states, with antiferromagnetism, singlet superconductivity, and triplet π pairing as the possible order parameters. Antiferromagnetism and superconductivity suppress each other, leaving only a small region in parameter space where both orders can coexist with a sizable order parameter for each. Triplet π pairing appears generically in the coexistence region, but its feedback on the other order parameters is very small.
Link to publication Download Bibtex entry

Navigation

Quick Access

Schnellnavigation zur Seite über Nummerneingabe