Dresden 2017 – wissenschaftliches Programm
TT 53.6: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P2-OG2
Unconventional superconductivity in the organic charge transfer salts beyond the Random Phase Approximation — •Karim Zantout and Roser Valentí — Institut für Theoretische Physik, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany
The κ-type organic charge transfer salts are often described by a single-band Hubbard model of dimers on an anisotropic triangular lattice at half filling. This work combines ab initio density functional theory calculations and the Two-Particle-Self-Consistent approach to calculate the superconducting transition temperature Tc and the symmetry of the superconducting gap function for some material representatives. Our results show that the dimer model is not sufficient to describe transition temperatures and gap symmetries in these systems and one has to invoke molecular-based models.