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TT: Fachverband Tiefe Temperaturen

TT 45: Superconductivity: (General) Theory

TT 45.1: Talk

Wednesday, March 13, 2013, 15:00–15:15, H21

Density Functional Theory for Superconductors — •Antonio Sanna, Andreas Linscheid, and E.K.U. Gross — Max-Planck Institute for Microstructure Physics, Halle

Superconducting density functional theory (SCDFT) is a fully parameter-free approach to superconductivity. We review the method discussing the main theoretical advantages and disadvantage of the approach as compared to standard Green's functions methods. We present results for several conventional and unconventional superconductors, and in particular we will discuss the special case of surface superconductivity considering the case of Pb on Si(111). Then we will report on the most recent extensions of the method: to incorporate in a correct way the Migdal's theorem; compute the excitation spectrum; describe a coexistence with magnetism.