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TT: Fachverband Tiefe Temperaturen

TT 10: Poster Session: Superconductivity

TT 10.19: Poster

Monday, March 14, 2011, 14:00–18:00, P4

Theory of normal state incoherence in iron superconductors. — •Luis Craco and Stefano Leoni — Physical Chemistry - Technical University Dresden

The precise nature of unconventional superconductivity in Iron superconductors is presently a hotly debated issue. An issue for theory is (a) whether these materials are incoherent, bad metals in the normal state and (b) how close they are to Mottness?

In this poster, we will show our recent efforts to describe the correlated nature of Fe-based superconductors. We will highlight how a combination of first principles and many-body calculations allows us to interpret and/or predict experimental results. In particular, we will show our results for spectroscopic [1], electrical [2] and thermal transport [3] of tetragonal-FeSe superconductor, all found to be in good agreement with extant data. We will also present a comparative study of the electronic states of tetragonal- and hexagonal-FeSe [4], showing normal state incoherence in both structural phases and orbital-selective Mott localization in hexagonal FeSe.
L. Craco, M.S. Laad, and S. Leoni, arXiv:0910.3828.
L. Craco, M.S. Laad, and S. Leoni, Europhys. Lett. 91, 27001 (2010).
L. Craco and M.S. Laad, arXiv:1001.3273.
L. Craco and S. Leoni, submitted to Europhysics Letters.