The physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

FeSe is a fascinating superconducting material at the frontier of research in condensed
matter physics. Here, we provide an overview of the current understanding of the electronic …

Magnetism and nematic order are the two nonsuperconducting orders observed in iron-
based superconductors. To elucidate the interplay between them and ultimately unveil the …

I review theoretical ideas and implications of experiments for the gap structure and symmetry
of the Fe-based superconductors. Unlike any other class of unconventional …

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 …

Technological progress in material synthesis, as well as artificial realization of condensed
matter scenarios via ultra-cold atomic gases in optical lattices or epitaxial growth of thin …

The presence of dxz-dyz orbital ordering is often considered a hallmark of the nematic
phase of Fe-based superconductors, including FeSe, but the details of the order parameter …

A large anisotropy in the electronic properties across a structural transition in several
correlated systems has been identified as the key manifestation of electronic nematic order …

Superconductivity originates from pairing of electrons near the Fermi energy. The Fermi
surface topology and pairing symmetry are thus two pivotal characteristics of a …

We report high resolution angle-resolved photo-emission spectroscopy (ARPES)
measurements of detwinned FeSe single crystals. The application of a mechanical strain is …