Non-rigid band shift and non-monotonic electronic structure changes upon doping in the normal state of the pnictide high temperature superconductor Ba2(Fe1-xCox)2As2

12 Oct 2016 Vilmercati PPaolo Mo Sung-Kwan Fedorov Alexei McGuire Michael Sefat Athena Sales Brian Mandrus David Singh David J. Ku Wei Johnston Steve Mannella Norman

We report systematic Angle Resolved Photoemission (ARPES) experiments using different photon polarizations and experimental geometries and find that the doping evolution of the normal state of Ba(Fe1-xCox)2As2 deviates significantly from the predictions of a rigid band model. The data reveal a non-monotonic dependence upon doping of key quantities such as band filling, bandwidth of the electron pocket, and quasiparticle coherence... (read more)

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  • SUPERCONDUCTIVITY
  • STRONGLY CORRELATED ELECTRONS