Berlin 2015 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 55: Low-Dimensional Systems: 2D – Theory
TT 55.10: Talk
Wednesday, March 18, 2015, 12:00–12:15, H 3010
FRG study of the Hubbard model on the bilayer square lattice — •Timo Reckling1,2, Michael M. Scherer2, and Laura Classen2 — 1Institut für Theoretische Festkörperphysik, RWTH Aachen University, 52056 Aachen, Germany — 2Institut für Theoretische Physik, Universität Heidelberg, 69120 Heidelberg, Germany
We study Hubbard model on the bilayer square lattice at and away from half filling as a model unifying various aspects of the physics of two-dimensional correlated fermions. We discuss on-site and interlayer density-density interactions by means of an unbiased functional renormalization group approach. This allows us to deduce the emergent order without previous assumptions about its nature and symmetry and can therefore be used to establish the appearance of spin and charge density wave ordering, as well as two types of superconductive instabilities away from half filling.