We employ reactive molecular-beam epitaxy to synthesize the metastable perovskite SrIrO3 and utilize {\it in situ} angle-resolved photoemission to reveal its electronic structure as an exotic narrow-band semimetal. We discover remarkably narrow bands which originate from a confluence of strong spin-orbit interactions, dimensionality, and both in- and out-of-plane IrO6 octahedral rotations. The partial occupation of numerous bands with strongly mixed orbital characters signals the breakdown of the single-band Mott picture that characterizes its insulating two-dimensional counterpart, Sr2IrO4, illustrating the power of structure-property relations for manipulating the subtle balance between spin-orbit interactions and electron-electron interactions.
@article{arxiv.1501.02265,
title = {Interplay of Spin-Orbit Interactions, Dimensionality, and Octahedral Rotations in Semimetallic SrIrO$_3$},
author = {Y. F. Nie and P. D. C. King and C. H. Kim and M. Uchida and H. I. Wei and B. D. Faeth and J. P. Ruf and J. P. C. Ruff and L. Xie and X. Pan and C. J. Fennie and D. G. Schlom and K. M. Shen},
journal= {arXiv preprint arXiv:1501.02265},
year = {2015}
}