Superconductivity develops in metals upon the formation of a coherent macroscopic
quantum state of electron pairs. Iron pnictides and chalcogenides are materials that have …

Immediately after the discovery of high temperature superconductivity in the cuprates in
1987, properties in the metallic state above T c were discovered that violated the reigning …

The surprising discovery of superconductivity in layered iron-based materials, with transition
temperatures climbing as high as 55 K, has led to thousands of publications on this subject …

The response of the worldwide scientific community to the discovery in 2008 of
superconductivity at T c= 26 K in the Fe-based compound LaFeAsO1− x F x has been very …

Studies of the electromagnetic response of various classes of correlated electron materials
including transition-metal oxides, organic and molecular conductors, intermetallic …

A key actor in the conventional theory of superconductivity is the induced interaction
between electrons mediated by the exchange of virtual collective fluctuations (phonons in …

High-temperature superconductivity in the iron-based materials emerges from, or sometimes
coexists with, their metallic or insulating parent compound states. This is surprising, as these …

High-temperature superconductivity often emerges in the proximity of a symmetry-breaking
ground state. For superconducting iron arsenides, in addition to the antiferromagnetic …

High-transition temperature (high-T c) superconductivity in the iron pnictides or
chalcogenides emerges from the suppression of the static antiferromagnetic order in their …

Nematicity, defined as broken rotational symmetry, has recently been observed in competing
phases proximate to the superconducting phase in the cuprate high-temperature …