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TT: Fachverband Tiefe Temperaturen

TT 86: Correlated Electrons: (General) Theory 2

TT 86.1: Vortrag

Donnerstag, 19. März 2015, 09:30–09:45, H 3005

A dual-fermion analysis of the Anderson-Hubbard model — •Patrick Haase¹, Shuxiang Yang², Thomas Pruschke¹, Juana Moreno², and Mark Jarrell² — ¹Georg-August Universität Göttingen — ²Louisiana State University

We apply the recently-developed dual-fermion method for disordered interacting systems to the Anderson-Hubbard model. This method treats both disorder and interaction on equal footing, takes into account non-local correlations systematically, and thus represents a significant extension over the single-site mean-field description. We analyze the metal-insulator transition as well as the anti-ferromagnetic transition of the three-dimensional cubic lattice, by looking at both the one- and two-particle quantities, like the local Green function and the conductivity.