Phase diagram of the Hubbard model: Beyond the dynamical mean field

Authors
Jarrell, M Maier, T Hettler, MH Tahvildarzadeh, AN
Citation
M. Jarrell et al., Phase diagram of the Hubbard model: Beyond the dynamical mean field, EUROPH LETT, 56(4), 2001, pp. 563-569
Citations number
21
Categorie Soggetti
Physics
Journal title
EUROPHYSICS LETTERS
ISSN journal
02955075 → ACNP
Volume
56
Issue
4
Year of publication
2001
Pages
563 - 569
Database
ISI
SICI code
0295-5075(200111)56:4<563:PDOTHM>2.0.ZU;2-9
Abstract
The Dynamical Cluster Approximation (DCA) is used to study non-local correc tions to the dynamical mean-field phase diagram of the two-dimensional Hubb ard model. Regions of antiferromagnetic, d-wave superconducting, pseudo-gap ped non-Fermi liquid, and Fermi liquid behaviors are found, in rough agreem ent with the generic phase diagram of the cuprates. The non-local fluctuati ons beyond the mean field both suppress the antiferromagnetism and mediate the superconductivity.