Berlin 2015 – wissenschaftliches Programm
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.