Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 24: Correlated Electrons: (General) Theory 2

TT 24.11: Vortrag

Mittwoch, 25. März 2009, 12:30–12:45, HSZ 301

Renormalization approach to the two-dimensional Periodic Anderson Model — •Alexander Mai and Klaus W. Becker — Institut für Theoretische Physik, TU Dresden

Despite the success of numerical methods in the treatment of strongly correlated electron systems, analytical approaches are still needed to obtain a deeper understanding of the underlying physics. We apply the Projector-based Renormalization Method (PRM) to the Periodic Anderson Model (PAM) in two dimensions to study the valence transition in heavy fermion systems and its dependence on the different model parameters. In order to investigate superconductivity we extend the model by adding a conduction electron phonon coupling. We discuss the superconducting solution with respect to the different parameters of the model and the valence transition in the PAM.