Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 42: Focus Session: Dynamical Mean-Field Approach to Correlated Electron Materials (jointly with MA)

MA 42.2: Topical Talk

Donnerstag, 14. März 2013, 15:30–16:00, H20

Correlation Effects in Organic Superconductors — •Roser Valenti — Institut für Theoretische Physik, Goethe Universität Frankfurt, Frankfurt, Germany

Organic charge transfer salts are unique correlated systems with a complex phase diagram that can be finely tuned by chemical substitution or moderate pressures. Observed phases in these systems include metals, Fermi liquids, Mott insulators, antiferromagnets, spin liquids, and unconventional superconductors. A realistic description of these systems can be provided by a combination of density functional theory with dynamical mean field theory (LDA+DMFT). Such an approach has not been attempted in the past due to the complex crystal structures of these materials. Here we present recent LDA+DMFT calculations based on a new scheme to obtain molecular Wannier orbitals for a few families of organic layered conductors and discuss their spectral and optical conductivity properties.
[1] H. C. Kandpal, I. Opahle, Y.-Z. Zhang, H. O. Jeschke, and R. Valenti, Phys. Rev. Lett. 103, 067004 (2009)
[2] J. Ferber, K. Foyevtsova, H.O. Jeschke, and R. Valenti, arXiv:1209.4466 (2012)