The structures, the phase diagrams, and the appearance of a neutron resonance signaling
an unconventional superconducting state provide phenomenological evidence relating the …

Since the discovery of high T c iron-based superconductors in early 2008, more than 15,000
papers have been published as a result of intensive research. This paper describes the …

The recently discovered Fe-pnictide and chalcogenide superconductors display low-
temperature properties suggesting superconducting gap structures which appear to vary …

The electronic ground state of a periodic system is usually described in terms of extended
Bloch orbitals, but an alternative representation in terms of localized “Wannier functions” …

In a superconductor electrons form pairs and electric transport becomes dissipation-less at
low temperatures. Recently discovered iron-based superconductors have the highest …

Nematicity and magnetism are two key features in Fe-based superconductors, and their
interplay is one of the most important unsolved problems. In FeSe, the magnetic order is …

The superconducting-gap distribution is a pivotal characteristic for a superconductor.
Whereas the cuprates and conventional phonon-mediated superconductors are …

Junctions and interfaces consisting of unconventional superconductors provide an excellent
experimental playground to study exotic phenomena related to the phase of the order …

The origin of superconductivity in the iron pnictides has been attributed to antiferromagnetic
spin ordering that occurs in close combination with a structural transition, but there are also …

Point-contact Andreev-reflection spectroscopy (PCAR) has proven to be one of the most
powerful tools in the investigation of superconductors, where it provides information on the …