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Observation of an electronic order along [110] direction in FeSe

Author

Listed:
  • Kunliang Bu

    (Zhejiang University)

  • Wenhao Zhang

    (Zhejiang University)

  • Ying Fei

    (Zhejiang University)

  • Yuan Zheng

    (Zhejiang University)

  • Fangzhou Ai

    (Zhejiang University)

  • Zongxiu Wu

    (Zhejiang University)

  • Qisi Wang

    (Fudan University)

  • Hongliang Wo

    (Fudan University)

  • Jun Zhao

    (Fudan University
    Nanjing University)

  • Yi Yin

    (Zhejiang University
    Nanjing University)

Abstract

Multiple ordered states have been observed in unconventional superconductors. Here, we apply scanning tunneling microscopy to probe the intrinsic ordered states in FeSe, the structurally simplest iron-based superconductor. Besides the well-known nematic order along [100] direction, we observe a checkerboard charge order in the iron lattice, which we name a [110] electronic order in FeSe. The [110] electronic order is robust at 77 K, accompanied with the rather weak [100] nematic order. At 4.5 K, The [100] nematic order is enhanced, while the [110] electronic order forms domains with reduced correlation length. In addition, the collective [110] order is gaped around [−40, 40] meV at 4.5 K. The observation of this exotic electronic order may shed new light on the origin of the ordered states in FeSe.

Suggested Citation

  • Kunliang Bu & Wenhao Zhang & Ying Fei & Yuan Zheng & Fangzhou Ai & Zongxiu Wu & Qisi Wang & Hongliang Wo & Jun Zhao & Yi Yin, 2021. "Observation of an electronic order along [110] direction in FeSe," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21318-w
    DOI: 10.1038/s41467-021-21318-w
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    Cited by:

    1. Ziyuan Chen & Dong Li & Zouyouwei Lu & Yue Liu & Jiakang Zhang & Yuanji Li & Ruotong Yin & Mingzhe Li & Tong Zhang & Xiaoli Dong & Ya-Jun Yan & Dong-Lai Feng, 2023. "Charge order driven by multiple-Q spin fluctuations in heavily electron-doped iron selenide superconductors," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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