By adding protons, the iron compounds react differently to the light ... Sphere─Manipulating the Excited-State Landscape in ...

Iron is the main ingredient in various forms ... Carbon (C): Carbon, a nonmetallic element, forms a number of organic and inorganic compounds and can be found in coal, petroleum and limestone.

In contrast with the cuprates, in the iron-based superconductors the undoped parent compounds are not Mott insulators, thus suggesting that correlations are not as strong as in the cuprates.