Kamihara and coworkers' report of superconductivity at T c= 26 K in fluorine-doped
LaFeAsO inspired a worldwide effort to understand the nature of the superconductivity in this …

The fascination of mankind towards a sudden change of a property, like colour, shape,
elasticity, viscosity, electrical conductivity and magnetism, is well known. If the change in …

We use high resolution angle-resolved photoemission to study the electronic structure of the
iron based high-temperature superconductors Ba (Fe 1-x Ru x) 2 As 2 as a function of Ru …

The interplay between unconventional Cooper pairing and quantum states associated with
atomic scale defects is a frontier of research with many open questions. So far, only a few of …

We study LiFeP, LiFeAs, and NaFeAs in their paramagnetic metallic phase including
dynamical electronic correlations within a density functional theory+ slave-spin mean-field …

We report results of 75 As nuclear magnetic resonance (NMR) and nuclear quadrupole
resonance (NQR) experiments as well as 7 Li NMR on different samples of self flux grown …

A non-trivial temperature evolution of superconductivity including a temperature-induced
phase transition between two superconducting phases or even a time-reversal symmetry …

Several angle-resolved photoemission spectroscopy (ARPES) studies reveal a poorly
nested Fermi surface of LiFeAs, far away from a spin density wave instability, and clear-cut …

We investigated magnetic vortices in two stoichiometric LiFeAs samples by means of
scanning tunneling microscopy and spectroscopy. The vortices were revealed by measuring …

The role of nematic fluctuations in the pairing mechanism of iron-based superconductors is
frequently debated. Here, we present a method to reveal such fluctuations by identifying the …