Observation of universal strong orbital-dependent correlation effects in iron chalcogenides
Observation of universal strong orbital-dependent correlation effects in iron chalcogenides
Establishing the appropriate theoretical framework for unconventional superconductivity in the iron-based materials requires correct understanding of both the electron correlation strength and the role of Fermi surfaces. This fundamental issue becomes especially relevant with the discovery of the iron chalcogenide superconductors. Here, we use angle-resolved photoemission spectroscopy to measure three …