paper

ARPES observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMn $_{2}$ As $_{2}$ and BaMn $_{2}$ Sb $_{2}$

arXiv:1608.06110 · doi:10.1103/PhysRevB.94.155155

Abstract

We performed an angle-resolved photoemission spectroscopy study of BaMn $_{2}$ As $_{2}$ and BaMn $_{2}$ Sb $_{2}$ , which are isostructural to the parent compound BaFe $_{2}$ As $_{2}$ of the 122 family of ferropnictide superconductors. We show the existence of a strongly $k_{z}$ -dependent band gap with a minimum at the Brillouin zone center, in agreement with their semiconducting properties. Despite the half-filling of the electronic 3 $d$ shell, we show that the band structure in these materials is almost not renormalized from the Kohn-Sham bands of density functional theory. Our photon energy dependent study provides evidence for Mn-pnictide hybridization, which may play a role in tuning the electronic correlations in these compounds.

7 pages, 4 figures. See published version for the latest update

ARPES observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMn2​As2​ and BaMn2​Sb2​

Abstract

ARPES observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMn $_{2}$ As $_{2}$ and BaMn $_{2}$ Sb $_{2}$