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arXiv:1804.07601 (cond-mat)
[Submitted on 20 Apr 2018]

Title:Decoupled Pairing Amplitude and Electronic Coherence in Iron-Based Superconductors

Authors:H. Miao, W. H. Brito, Z. P. Yin, R. D. Zhong, G. D. Gu, P. D. Johnson, M. P. M. Dean, S. Choi, G. Kotliar, W. Ku, X. C. Wang, C. Q. Jin, S. -F. Wu, T. Qian, H. Ding
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Abstract:Here we use angle-resolved photoemission spectroscopy to study superconductivity that emerges in two extreme cases, from a Fermi liquid phase (LiFeAs) and an incoherent bad-metal phase (FeTe0.55Se0.45). We find that although the electronic coherence can strongly reshape the single-particle spectral function in the superconducting state, it is decoupled from the maximum superconducting pairing amplitude, which shows a universal scaling that is valid for all FeSCs. Our observation excludes pairing scenarios in the BCS and the BEC limit for FeSCs and calls for a universal strong coupling pairing mechanism for the FeSCs.
Comments: 6 pages, 4 figures
Subjects: Superconductivity (cond-mat.supr-con)
Cite as: arXiv:1804.07601 [cond-mat.supr-con]
  (or arXiv:1804.07601v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.1804.07601
Journal reference: Phys. Rev. B 98, 020502 (2018)
Related DOI: https://doi.org/10.1103/PhysRevB.98.020502

Submission history

From: Hu Miao [view email]
[v1] Fri, 20 Apr 2018 13:24:28 UTC (450 KB)
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