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

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

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 agreem...

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Bibliographische Detailangaben
Hauptverfasser: Jarrell, M, Maier, Th, Hettler, M. H, Tahvildarzadeh, A. N
Format: Artikel
Sprache:eng
Schlagworte:
Physics - Strongly Correlated Electrons
Physics - Superconductivity
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Zusammenfassung: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.
DOI:10.48550/arxiv.cond-mat/0011282