Unusual band renormalization in the simplest iron based superconductor
Abstract
The electronic structure of the iron chalcogenide superconductor FeSe1-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 FeSe1-x, DFT calculations and existing data on FeSexTe1-x. The bands undergo a pronounced orbital dependent renormalization, different from what was observed for FeSexTe1-x and any other pnictides.
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