How chemical pressure affects the fundamental properties of rare-earth pnictides: an ARPES view

Rare-earth pnictides of the form REFePnO (RE: Rare Earth, Pn: As or P) have attracted considerable interest in the last few years due to the competition between magnetic and superconducting (SC) properties. Both are closely related to the unique topology of their Fermi surfaces. Hole and electron-like sheets around the and M points, respectively, enable the adjustment of nesting conditions by charge carrier doping [1‐3]. At the same time, chemical pressure induced through the substitution of P by As allows to manipulate the band structure near the Fermi level (EF )[4].