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

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

This article reviews the 40+ year old spin-glass field and one of its earliest model
interpretations as a spin density wave. Our description is from an experimental …

The present article reviews recent experimental investigations of spin dynamics in iron-
based superconductors and their parent compounds by means of inelastic neutron …

High-temperature superconductivity in iron pnictides and chalcogenides emerges when a
magnetic phase is suppressed. The multi-orbital character and the strength of correlations …

We use nuclear magnetic resonance (NMR), high-resolution x-ray, and neutron scattering
studies to study structural and magnetic phase transitions in phosphorus-doped BaFe 2 (As …

We study the effects of disorder on unconventional superconductors in the presence of
correlations, and explore a novel correlated disorder paradigm dominated by strong …

We use neutron resonance spin echo and Larmor diffraction to study the effect of uniaxial
pressure on the tetragonal-to-orthorhombic structural (T s) and antiferromagnetic (AF) phase …

Two ordering states, antiferromagnetism and nematicity, have been observed in most iron-
based superconductors (SCs). In contrast to those SCs, the newly discovered SC CaK (Fe 1 …

We present As 75 nuclear magnetic resonance spin-lattice and spin-spin relaxation rate
data in Ba (Fe 1− x Co x) 2 As 2 and Ba (Fe 1− x Cu x) 2 As 2 as a function of temperature …