Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 44: Low-Dimensional Systems: 2D - Theory (TT jointly with O)

O 44.10: Talk

Wednesday, April 2, 2014, 12:00–12:15, BEY 81

Dimensional-Crossover-Driven Mott Transition: A Variational Cluster Approach — •Benjamin Lenz and Thomas Pruschke — Institut für Theoretische Physik, Georg-August-Universität Göttingen, Germany

The dimensional-crossover-driven Mott transition has been studied recently for a frustrated Hubbard model with next-nearest neighbor hopping at finite temperatures [Raczkowski, Assaad, PRL 109 (2012)]. Here, we study this crossover from one to two dimensions at zero temperature by means of the variational cluster approximation (VCA) for fixed frustration as function of the interaction. The transition at zero temperature is found to be continuous, and results for various dynamic and static quantities are discussed as a function of cluster size.