Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 17: Superconductivity: Fe-based Superconductors - 122 Part 2 & Theory

TT 17.7: Talk

Tuesday, March 27, 2012, 11:15–11:30, H 2053

Eight-band model for the iron arsenides studied by functional RG — •Julian Lichtenstein, Stefan Maier, and Carsten Honerkamp — Institute for Theoretical Solid State Physics, RWTH Aachen University

We analyze the superconducting instabilities in eight-band models for the iron arsenides by a functional renormalization group approach. This approach allows us to include the arsenic p-states and their non-local interactions directly without having to use descriptions where these states are included via down-folding of the single-particle part and additional screening of the interactions. We compare the results with those found in five-band studies and discuss trends of the superconducting instability as function of various material parameters.