Anomalous metallic oxygen band in the potential superconductor KCa${}_2$Fe${}_4$As${}_4$O${}_2$

Nikita S. Pavlov, Kirill S. Pervakov, Igor A. Nekrasov

The electronic structure, magnetism and Fermi surface of a hole self-doped potential iron-based superconductor KCa${}_2$Fe${}_4$As${}_4$O${}_2$ (12442) were studied by a first-principes DF…