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TT: Fachverband Tiefe Temperaturen
TT 83: Superconductivity: (General) Theory
TT 83.10: Talk
Thursday, March 15, 2018, 12:00–12:15, HFT-FT 101
The Concept of Superconducting Fitness — •Aline Ramires1, Manfred Sigrist2, and Daniel Agterberg3 — 1Institute for Theoretical Studies, ETH Zurich, 8092 Zurich, Switzerland — 2Institute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland — 3Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA
In this talk, we present a general scheme to probe the compatibility of arbitrary pairing states with a given normal state Hamiltonian by the introduction of a concept called Superconducting Fitness. This quantity gives a direct measure of the suppression of the superconducting critical temperature in the presence of key symmetry-breaking fields and can be used as a tool to identify nontrivial mechanisms to suppress superconductivity in complex multi-orbital systems. This concept can also be employed as a guide to engineer normal state Hamiltonians in order to favor or suppress different order parameters. We discuss the application of this idea to Sr2Ru04, CePt3Si, KFe2As2 and CuxBi2Se3.