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Experimental observation of incoherent-coherent crossover and orbital-dependent band renormalization in iron chalcogenide superconductors

  • Author(s): Liu, ZK
  • Yi, M
  • Zhang, Y
  • Hu, J
  • Yu, R
  • Zhu, JX
  • He, RH
  • Chen, YL
  • Hashimoto, M
  • Moore, RG
  • Mo, SK
  • Hussain, Z
  • Si, Q
  • Mao, ZQ
  • Lu, DH
  • Shen, ZX
  • et al.
Abstract

© 2015 American Physical Society. The level of electronic correlation has been one of the key questions in understanding the nature of superconductivity. Among the iron-based superconductors, the iron chalcogenide family exhibits the strongest electron correlations. To gauge the correlation strength, we performed a systematic angle-resolved photoemission spectroscopy study on the iron chalcogenide series Fe1+ySexTe1-x (0

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