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We performed an angle-resolved photoemission spectroscopy study ofBaMn$_2$As$_2$ and BaMn$_2$Sb$_2$, which are isostructural to the parentcompound BaFe$_2$As$_2$ of the 122 family of ferropnictide superconductors. Weshow the existence of a strongly $k_z$-dependent band gap with a minimum at theBrillouin zone center, in agreement with their semiconducting properties.Despite the half-filling of the electronic 3$d$ shell, we show that the bandstructure in these materials is almost not renormalized from the Kohn-Shambands of density functional theory. Our photon energy dependent study providesevidence for Mn-pnictide hybridization, which may play a role in tuning theelectronic correlations in these compounds.

ARPES observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMn$_2$As$_2$ and BaMn$_2$Sb$_2$