Abstract

Fe-based superconductors are a new class of high-temperature superconductors with a maximum critical temperature of 65-75 K. This chapter introduces the different compounds and their crystallographic structures as well as their peculiar electronic band structure and Fermi surface topology. The multiple electronic bands at the Fermi level are responsible for the rich variety in nematic, magnetic and superconducting properties which place Fe-pnictides and Fe-chalcogenides into focus for condensed matter physicists.

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