%0 Journal Article
%T Correlated vs. conventional insulating behavior in the Jeff=1/2 vs. 3/2 bands in the layered iridate Ba2IrO4
%A M. Uchida
%A Y. F. Nie
%A P. D. C. King
%A C. H. Kim
%A C. J. Fennie
%A D. G. Schlom
%A K. M. Shen
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevB.90.075142
%X We employ molecular beam epitaxy to stabilize Ba2IrO4 thin films and utilize in situ angle-resolved photoemission spectroscopy to investigate the evolution of its electronic structure through the Neel temperature TN. Our measurements indicate that dispersions of the relativistic Jeff=1/2 and 3/2 bands exhibit an unusual dichotomy in their behavior through the Neel transition. Although the charge gap survives into the paramagnetic state, only the Jeff=1/2 state exhibits a strong temperature dependence and its gap softens with increasing temperature approaching TN, while the nearly fully occupied Jeff=3/2 state which remains nearby in energy exhibits negligible changes with temperature.
%U http://arxiv.org/abs/1408.6314v1