First-order Mott transition at zero temperature in two dimensions: Variational plaquette study
| Titre | First-order Mott transition at zero temperature in two dimensions: Variational plaquette study |
| Type de publication | Journal Article |
| Nouvelles publications | 2009 |
| Auteurs | Balzer M, Kyung B, Sénéchal D, Tremblay A-MS, Potthoff M |
| Journal | Europhysics Letters |
| Volume | 85 |
| Pagination | 17002/1-6 |
| Année de publication | 2009 |
| 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 |
