'Conventional'superconductivity, as used in this review, refers to electron–phonon-coupled
superconducting electron pairs described by BCS theory. Unconventional superconductivity …

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

The multiband nature of iron pnictides gives rise to a rich temperature-doping phase
diagram of competing orders and a plethora of collective phenomena. At low dopings, the …

Phase diagrams play a primary role in the understanding of materials properties. For iron-
based superconductors (Fe-SC), the correct definition of their phase diagrams is crucial …

We have systematically studied the nematic fluctuations in the electron-doped iron-based
superconductor BaFe 2-x Ni x As 2 by measuring the in-plane resistance change under …

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 …

We present evidence for nuclear spin-lattice relaxation driven by glassy nematic fluctuations
in isovalent P-doped BaFe 2 As 2 single crystals. Both the As 75 and P 31 sites exhibit a …

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 …

Understanding the interplay between nematicity, magnetism and superconductivity is pivotal
for elucidating the physics of iron-based superconductors. Here we use neutron scattering to …

We present the strain and temperature dependence of an anomalous nematic phase in
optimally doped BaFe 2 (As, P) 2. Polarized ultrafast optical measurements reveal broken …