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TT: Fachverband Tiefe Temperaturen

TT 12: Poster Session Superconductivity

TT 12.25: Poster

Monday, March 11, 2013, 15:00–19:00, Poster D

Quasiparticle scattering rates in iron pnictides from the functional renormalization group — •Guido Klingschat¹, Julian Lichtenstein¹, and Carsten Honerkamp^1,2 — ¹Institute for Theoretical Solid State Physics, RWTH Aachen University, 52056 Aachen, Germany — ²JARA - Fundamentals of Future Information Technology

We use a function renormalization group approach [1] to compute the quasiparticle scattering rate in eight-band models [2] for iron pnictide superconductors. This way we obtain the anisotropy and temperature dependences of the scattering rates above the critcial scales towards long-range orderings. We study material-specific variations and compare the scattering rate anisotropies with the predicted gap anisotropies in the superconducting state.
[1] C. Honerkamp, Eur. Phys. J. B 21, 81 (2001)
O. K. Andersen and L. Boeri, Ann. Phys. (Berlin) 523, 8 (2011)