Iron based high transition temperature superconductors

Abstract

In a superconductor electrons form pairs and electric transport becomes dissipation-less at low temperatures. Recently discovered iron based superconductors have the highest superconducting transition temperature next to copper oxides. In this article, we review material aspects and physical properties of iron based superconductors. We discuss the dependence of transition temperature on the crystal structure, the interplay between antiferromagnetism and superconductivity by examining neutron scattering experiments, and the electronic properties of these compounds obtained by angle resolved photoemission spectroscopy in link with some results from scanning tunneling microscopy/spectroscopy measurements. Possible microscopic model for this class of compounds is discussed from a strong coupling point of view.

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• Peculiar properties of Cr${}_3$As${}_3$-chain-based superconductors
• Superconductivity and multiple pressure-induced phases in BaPt${}_2$As${}_2$
• Phase Diagram and Weak-link Behavior in Nd-doped CaFe_2As_2
• Orbital-selective Mott phase of Cu-substituted iron-based Superconductors
• Persistent Magnetism in Silver-doped BaFe2As2 Crystals