Phase Diagram of the Hubbard Model: Beyond the Dynamical Mean Field

Details Phase Diagram of the Hubbard Model: Beyond the Dynamical Mean Field Phase Diagram of the Hubbard Model: Beyond the Dynamical Mean Field

2000-11-16

arxiv.org/abs/cond-mat/0011282v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 eps figures, submitted to PRL

Scientific paper

10.1209/epl/i2001-00557-x

The Dynamical Cluster Approximation (DCA) is used to study non-local corrections to the dynamical mean field phase diagram of the two-dimensional Hubbard model. Regions of antiferromagnetic, d-wave superconducting, pseudo-gapped non-Fermi liquid, and Fermi liquid behaviors are found, in rough agreement with the generic phase diagram of the cuprates. The non-local fluctuations beyond the mean field both suppress the antiferromagnetism and mediate the superconductivity.

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