Angle resolved photoemission spectroscopy (ARPES) reveals the features of the electronic
structure of quasi-two-dimensional crystals which are crucial for spin and charge ordering …

Spin–orbit coupling is a fundamental interaction in solids that can induce a broad range of
unusual physical properties, from topologically non-trivial insulating states to unconventional …

The onset of superconductivity at the transition temperature is marked by the onset of order,
which is characterized by an energy gap. Most models of the iron-based superconductors …

We report low-temperature specific heat measurements for high-quality single crystalline
KFe 2 As 2 (T c≈ 3.5 K). The investigated zero-field specific heat data yields an unusually …

We discuss the role of electronic correlations in the iron-based superconductor LiFeAs by
studying the effects on band structure, mass enhancements, and Fermi surface in the …

Magnetic correlations in superconducting LiFeAs were studied by elastic and by inelastic
neutron-scattering experiments. There is no indication for static magnetic ordering, but …

We analyze the structure of the pairing interaction and superconducting gap in LiFeAs by
decomposing the pairing interaction for various kz cuts into s-and d-wave components and …

A new quaternary sulfide telluride, Ba6Fe2Te3S7, was synthesized by a solid-state reaction,
and its crystal structure is novel. X-ray diffraction data on powder and single crystals reveal …

The role of nematic order for the mechanism of high-temperature superconductivity is highly
debated. In most iron-based superconductors (IBSs) the tetragonal symmetry is broken …

A crucial step in revealing the nature of unconventional superconductivity is to investigate
the symmetry of the superconducting order parameter. Scanning tunneling spectroscopy has …