Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session

TT 33.16: Poster

Wednesday, March 28, 2012, 15:00–19:00, Poster B

Quasiparticle properties in iron arsenides — •Guido Klingschat and Carsten Honerkamp — RWTH Aachen

We calculate the quasiparticle scattering rates and renormalization factors around the various Fermi pockets in multi-band models for iron arsenide superconductors by perturbation theory. The existence of a fifth Fermi pocket is found to have an important influence on the anisotropy of the scattering. We furthermore compare the anisotropies and pocket dependences of the scattering rates with those of the superconducting gaps found in the functional renormalization group and discuss the role of Hund's coupling on these observables.