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arxiv 1307.1280 v1 pith:UX2Y4GH6 submitted 2013-07-04 cond-mat.supr-con

Unusual band renormalization in the simplest iron based superconductor

classification cond-mat.supr-con
keywords fesecalculationselectronicironrenormalizationstructuresuperconductorangle-resolved
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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