Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 15: Superconductivity: Poster Session
TT 15.23: Poster
Dienstag, 26. Februar 2008, 14:00–18:00, Poster B
Theory for cooper pairing in non-centrosymmetric superconductors — •Ludwig Klam and Dirk Manske — Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
With the discovery of superconductivity in the non-centrosymmetric heavy Fermion compound CePt3Si by E. Bauer et al. a new field of research has developed. Since in this compound the order parameter is – due to a large antisymmetric spin-orbit coupling – a superposition of a spin singlet and spin triplet state, many new interesting properties have been observed. The pairing interaction giving rise to this mixed parity order parameter can be parameterized, and depending on the strength of the different interaction contributions we explore the phase diagram and the nodal structure.
We use a Green’s function approach in order to calculate response and transport functions such as the Knight shift and the spin susceptibility. Furthermore we investigate the role of the band-structure obtained from LDA calculations and use a parametrization for the so-called β-band of CePt3Si in order to compare our numerical results to the experiments.