| Issue |
Europhys. Lett.
Volume 56, Number 4, November 2001
|
|
|---|---|---|
| Page(s) | 563 - 569 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00557-x | |
| Published online | 01 December 2003 | |
Phase diagram of the Hubbard model: Beyond the dynamical mean field
1
Department of Physics, University of Cincinnati - Cincinnati,
OH 45221, USA
2
Institut für Theoretische Physik, Universität Regensburg
93040 Regensburg, Germany
3
Forschungszentrum Karlsruhe - Postfach 3640,
76021 Karlsruhe, Germany
Received:
27
March
2001
Accepted:
30
August
2001
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.
PACS: 71.10.-w – Theories and models of many-electron systems / 71.10.Hf – Non-Fermi liquid ground states, electron phase diagrams and phase transitions in model systems / 74.20.-z – Theories and models of superconducting state
© EDP Sciences, 2001
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