University of Minnesota
School of Physics & Astronomy

Condensed Matter Seminar

Thursday, March 10th 2016
Speaker:  Carsten Honerkamp (Institute for Theoretical Solid-State Physics, RWTH Aachen University)
Note date and time of special seminar

After an introduction, in the first part of the talk, I discuss a new fermionic functional renormalization group variant for two-dimensional lattice models that combines a physically appealing truncation of the wavevector dependence of the running interactions with certain numerical advantages. This allows for an efficient parallelized evaluation in which, e.g., the convergence of the expansion can be checked. In the second part of talk, I present new results on a model for iron superconductors that show that nematic orbital ordering occurs in different forms as competitor but also concomitant ordering tendency to the more conventional antiferromagnetic ordering and spin-fluctuation-induced pairing at low energies.

Faculty Host: Andrey Chubukov

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