The low-energy electronic structure of the J_{eff}=1/2 spin-orbit insulator Sr3Ir2O7 has been studied by means of angle-resolved photoemission spectroscopy. A comparison of the results for bilayer Sr3Ir2O7 with available literature data for the related single-layer compound Sr2IrO4 reveals qualitative similarities and similar J_{eff}=1/2 bandwidths for the two materials, but also pronounced differences in the distribution of the spectral weight. In particuar, photoemission from the J_{eff}=1/2 states appears to be suppressed. Yet, it is found that the Sr3Ir2O7 data are in overall better agreement with band-structure calculations than the data for Sr2IrO4.
@article{arxiv.1207.1556,
title = {The J_{eff}=1/2 insulator Sr3Ir2O7 studied by means of angle-resolved photoemission spectroscopy},
author = {B. M. Wojek and M. H. Berntsen and S. Boseggia and A. T. Boothroyd and D. Prabhakaran and D. F. McMorrow and H. M. Rønnow and J. Chang and O. Tjernberg},
journal= {arXiv preprint arXiv:1207.1556},
year = {2012}
}