Volume 85, Number 1, January 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||07 January 2009|
First-order Mott transition at zero temperature in two dimensions: Variational plaquette study
Institut für Theoretische Physik und Astrophysik, Universität Würzburg - Würzburg, Germany, EU
2 Département de physique and RQMP, Université de Sherbrooke - Québec, J1K 2R1 Canada
3 I. Institut für Theoretische Physik, Universität Hamburg - Hamburg, Germany, EU
Corresponding author: firstname.lastname@example.org
Accepted: 27 November 2008
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.
PACS: 71.10.-w – Theories and models of many-electron systems / 71.30.+h – Metal-insulator transitions and other electronic transitions
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.