Although the existence of nematic order in iron-based superconductors is now a well-
established experimental fact, its origin remains controversial. Nematic order breaks the …

The spontaneous reduction of rotational symmetry in a crystalline solid driven by an
electronic mechanism is referred to as electronic nematicity. This phenomenon—initially …

A fundamental and unconventional characteristic of superconductivity in iron-based
materials is that it occurs in the vicinity of two other instabilities. In addition to a tendency …

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

Iron-based superconductors are well known for their complex interplay between structure,
magnetism and superconductivity. FeSe offers a particularly fascinating example. This …

The nature of the tetragonal-to-orthorhombic structural transition at T s≈ 90 K in single
crystalline FeSe is studied using shear-modulus, heat-capacity, magnetization, and nuclear …

Superconductivity emerges in proximity to a nematic phase in most iron-based
superconductors. It is therefore important to understand the impact of nematicity on the …

We review the recent developments in electronic Raman scattering measurements of charge
nematic fluctuations in iron-based superconductors. A simple theoretical framework of a d …

Several classes of materials manifest displacive phase transitions, including shape memory
alloys, many electronically correlated materials, superconductors, and ferroelectrics. Each of …

We review our recent experimental results on the electronic nematic phase in electron-and
hole-doped BaFe 2 As 2 and FeSe. The nematic susceptibility is extracted from shear …