Evolution of band structure from optimally doped to heavily overdoped Co-substituted NaFeAs

S. T. Cui, S. Y. Zhu, A. F. Wang +6

Using angle-resolved photoemission spectroscopy, we studied the electronic structure of NaFe${}_{1-x}$Co${}_x$As from an optimally doped superconducting compound ($x=0.028$) to a heavi…