Spontaneous symmetry breaking—the phenomenon in which an infinitesimal perturbation
can cause the system to break the underlying symmetry—is a cornerstone concept in the …

From correlations in measurement outcomes alone, can two otherwise isolated parties
establish whether such correlations are atemporal? That is, can they rule out that they have …

We use resonant inelastic x-ray scattering (RIXS) at the Fe-L 3 edge to study the spin
excitations of uniaxial-strained and unstrained FeSe 1-x S x (0≤ x≤ 0.21) samples. The …

We report the separate response of the critical temperature of the nematic phase transition
TS to symmetric and antisymmetric strains for the prototypical underdoped iron pnictide Ba …

We show that the dynamics of any open quantum system that is initially correlated with its
environment can be described by a set of d 2 (or less) completely positive maps, where d is …

Neutron spin‐echo (NSE) spectroscopy is a powerful tool for the study of magnon lifetimes
and magnetic critical dynamics. The unique property of NSE is the energy resolution in the …

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

Most parent compounds of iron-based superconductors (FeSCs) exhibit a tetragonal-to-
orthorhombic lattice distortion below T s associated with an electronic nematic phase that …

Understanding magnetic interactions in the parent compounds of high-temperature
superconductors forms the basis for determining their role for the mechanism of …

The origin of nematic order remains one of the major debates in iron-based
superconductors. In theories based on spin nematicity, one major prediction is that the spin …