Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 32: SC: Fe-based Superconductors - Theory
TT 32.4: Vortrag
Mittwoch, 16. März 2011, 11:15–11:30, HSZ 304
Doping dependence of antiferromagnetism in the pnictides — •Jacob Schmiedt1, P.M.R. Brydon1, Maria Daghofer2, and Carsten Timm1 — 1Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany — 2IFW Dresden, P.O. Box 270116, 01171 Dresden, Germany
Various models have been proposed to describe the antiferromagnetic phase in iron pnictides. Models that take into account five d-orbitals are expected to contain all necessary information that is needed for the explanation of this phase. Based on RPA and mean-field calculations we investigate the doping dependence of the AFM phase in several different five-orbital models. In each of them a strong enhancement of the critical temperature is found for hole doping. We seek to understand this behavior by examining the corresponding change of the Fermi surface and its nesting properties.