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Kondo interaction in FeTe and its potential role in the magnetic order

Author

Listed:
  • Younsik Kim

    (Institute for Basic Science
    Seoul National University)

  • Min-Seok Kim

    (DGIST)

  • Dongwook Kim

    (Pohang University of Science and Technology (POSTECH))

  • Minjae Kim

    (Korea Institute for Advanced Study)

  • Minsoo Kim

    (Institute for Basic Science
    Seoul National University)

  • Cheng-Maw Cheng

    (National Synchrotron Radiation Research Center)

  • Joonyoung Choi

    (Kyungpook National University)

  • Saegyeol Jung

    (Institute for Basic Science
    Seoul National University)

  • Donghui Lu

    (SLAC National Accelerator Laboratory)

  • Jong Hyuk Kim

    (Yonsei University)

  • Soohyun Cho

    (Chinese Academy of Sciences)

  • Dongjoon Song

    (Institute for Basic Science
    Seoul National University)

  • Dongjin Oh

    (Institute for Basic Science
    Seoul National University
    Massachusetts Institute of Technology)

  • Li Yu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Young Jai Choi

    (Yonsei University)

  • Hyeong-Do Kim

    (Pohang Accelerator Laboratory)

  • Jung Hoon Han

    (Sungkyunkwan University)

  • Younjung Jo

    (Kyungpook National University)

  • Ji Hoon Shim

    (Pohang University of Science and Technology (POSTECH))

  • Jungpil Seo

    (DGIST)

  • Soonsang Huh

    (Institute for Basic Science
    Seoul National University)

  • Changyoung Kim

    (Institute for Basic Science
    Seoul National University)

Abstract

Finding d-electron heavy fermion states has been an important topic as the diversity in d-electron materials can lead to many exotic Kondo effect-related phenomena or new states of matter such as correlation-driven topological Kondo insulator. Yet, obtaining direct spectroscopic evidence for a d-electron heavy fermion system has been elusive to date. Here, we report the observation of Kondo lattice behavior in an antiferromagnetic metal, FeTe, via angle-resolved photoemission spectroscopy, scanning tunneling spectroscopy and transport property measurements. The Kondo lattice behavior is represented by the emergence of a sharp quasiparticle and Fano-type tunneling spectra at low temperatures. The transport property measurements confirm the low-temperature Fermi liquid behavior and reveal successive coherent-incoherent crossover upon increasing temperature. We interpret the Kondo lattice behavior as a result of hybridization between localized Fe 3dxy and itinerant Te 5pz orbitals. Our observations strongly suggest unusual cooperation between Kondo lattice behavior and long-range magnetic order.

Suggested Citation

  • Younsik Kim & Min-Seok Kim & Dongwook Kim & Minjae Kim & Minsoo Kim & Cheng-Maw Cheng & Joonyoung Choi & Saegyeol Jung & Donghui Lu & Jong Hyuk Kim & Soohyun Cho & Dongjoon Song & Dongjin Oh & Li Yu &, 2023. "Kondo interaction in FeTe and its potential role in the magnetic order," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39827-1
    DOI: 10.1038/s41467-023-39827-1
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