First-order Mott transition at zero temperature in two dimensions: Variational plaquette study

TitreFirst-order Mott transition at zero temperature in two dimensions: Variational plaquette study
Type de publicationJournal Article
Nouvelles publications2009
AuteursBalzer, M, Kyung, B, Sénéchal, D, Tremblay, A-MS, Potthoff, M
JournalEurophysics Letters
Volume85
Pagination17002/1-6
Année de publication2009
Résumé

The nature of the metal-insulator Mott transition at zero temperature has been discussed for a number of years. Whether it occurs through a quantum critical point or through a first-order transition is expected to profoundly influence the nature of the finite-temperature phase diagram. In this paper, we study the zero temperature Mott transition in the two-dimensional Hubbard model on the square lattice with the variational cluster approximation. This takes into account the influence of antiferromagnetic short-range correlations. By contrast to single-site dynamical mean-field theory, the transition turns out to be first order even at zero temperature. Copyright (C) EPLA, 2009

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