Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe 0.55Se 0.45

H. Miao, P. Richard, Y. Tanaka, K. Nakayama, T. Qian, K. Umezawa, T. Sato, Y. M. Xu, Y. B. Shi, N. Xu, X. P. Wang, P. Zhang, H. B. Yang, Z. J. Xu, J. S. Wen, G. D. Gu, X. Dai, J. P. Hu, T. Takahashi, H. Ding

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

We used angle-resolved photoemission spectroscopy to reveal directly the momentum distribution of the superconducting gap in FeTe 1-xSe x, which has the simplest structure of all Fe-based superconductors. We found isotropic superconducting gaps on all Fermi surfaces whose sizes can be fitted by a single gap function derived from a strong coupling approach, promoting local antiferromagnetic exchange interactions as a serious candidate for the pairing origin.

Original languageEnglish
Article number094506
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number9
DOIs
Publication statusPublished - 2012 Mar 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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