%0 Journal Article %T Unusual band renormalization in the simplest iron based superconductor %A J. Maletz %A V. B. Zabolotnyy %A D. V. Evtushinsky %A S. Thirupathaiah %A A. U. B. Wolter %A L. Harnagea %A A. N. Yaresko %A A. N. Vasiliev %A D. A. Chareev %A E. D. L. Rienks %A B. B¨ąchner %A S. V. Borisenko %J Physics %D 2013 %I arXiv %R 10.1103/PhysRevB.89.220506 %X The electronic structure of the iron chalcogenide superconductor FeSe_{1-x} was investigated by high- resolution angle-resolved photoemission spectroscopy (ARPES). The results were compared to DFT calculations showing some significant differences between the experimental electronic structure of FeSe_{1-x}, DFT calculations and existing data on FeSe_{x}Te_{1-x}. The bands undergo a pronounced orbital dependent renormalization, different from what was observed for FeSe_{x}Te_{1-x} and any other pnictides. %U http://arxiv.org/abs/1307.1280v1