Evidence of Strong Coupling in Antiferromagnetic Ordered Iron Chalcogenide Fe$_{1.02}$Te Observed by Photoemission

ORAL

Abstract

The role of many-body effects is one of the central questions for unconventional superconductivity. For the recently discovered iron-based superconductors, the strength of electronic correlations is still an unsettled issue. For one of them, iron chalcogenides, a strong correlation scenario has both been proposed by theory and suggested by experiments. However, the metallic behavior in the antiferromagnetic ordered state in Fe$_{1.02}$Te seems to deviate from such scenario. Our discovery of evidence of strong coupling in electronic bandstructure probed by angle resolved photoemission (ARPES) reconciles this contrast. Our finding also highlights the non-trivial enrichment of many-body effects when multiple ingredients of interactions reinforce each other.

–

Authors

  • Zhongkai Liu

    • Stanford University

  • Ruihua He

    • Lawrence Berkeley National Laboratory

  • Donghui Lu

    • SLAC National Accelerator Laboratory

  • Ming Yi

    • Stanford University

  • Yulin Chen

    • SLAC National Accelerator Laboratory

  • Makoto Hashimoto

    • SLAC National Accelerator Laboratory

  • Rob Moore

    • SLAC National Accelerator Laboratory

  • Sungkwan Mo

    • Lawrence Berkeley National Laboratory

  • Jin Hu

    • Tulane University

  • Tijiang Liu

    • Tulane University

  • Zhiqiang Mao

    • Tulane University

  • Thomas Devereaux

    • SLAC National Accelerator Laboratory

  • Zahid Hussain

    • Lawrence Berkeley National Laboratory

  • Zhi-Xun Shen

    • Stanford University