IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v14y2023i1d10.1038_s41467-023-40931-5.html
   My bibliography  Save this article

Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states

Author

Listed:
  • Zhongxu Wei

    (Southern University of Science and Technology
    Tsinghua University)

  • Shengshan Qin

    (Beijing Institute of Technology
    University of Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Cui Ding

    (Tsinghua University
    Beijing Academy of Quantum Information Sciences)

  • Xianxin Wu

    (Chinese Academy of Sciences)

  • Jiangping Hu

    (University of Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Yu-Jie Sun

    (Southern University of Science and Technology
    Quantum Science Center of Guangdong–Hong Kong–Macao Greater Bay Area (Guangdong))

  • Lili Wang

    (Tsinghua University)

  • Qi-Kun Xue

    (Southern University of Science and Technology
    Tsinghua University
    Beijing Academy of Quantum Information Sciences
    Quantum Science Center of Guangdong–Hong Kong–Macao Greater Bay Area (Guangdong))

Abstract

Determining the pairing symmetry of single-layer FeSe on SrTiO3 is the key to understanding the enhanced pairing mechanism. It also guides the search for superconductors with high transition temperatures. Despite considerable efforts, it remains controversial whether the symmetry is the sign-preserving s- or the sign-changing s±-wave. Here, we investigate the pairing symmetry of single-layer FeSe from a topological point of view. Using low-temperature scanning tunneling microscopy/spectroscopy, we systematically characterize the superconducting states at edges and corners of single-layer FeSe. The tunneling spectra collected at edges and corners show a full energy gap and a substantial dip, respectively, suggesting the absence of topologically non-trivial edge and corner modes. According to our theoretical calculations, these spectroscopic features can be considered as strong evidence for the sign-preserving s-wave pairing in single-layer FeSe.

Suggested Citation

  • Zhongxu Wei & Shengshan Qin & Cui Ding & Xianxin Wu & Jiangping Hu & Yu-Jie Sun & Lili Wang & Qi-Kun Xue, 2023. "Identifying s-wave pairing symmetry in single-layer FeSe from topologically trivial edge states," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40931-5
    DOI: 10.1038/s41467-023-40931-5
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-023-40931-5
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-023-40931-5?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. Zengyi Du & Xiong Yang & Hai Lin & Delong Fang & Guan Du & Jie Xing & Huan Yang & Xiyu Zhu & Hai-Hu Wen, 2016. "Scrutinizing the double superconducting gaps and strong coupling pairing in (Li1−xFex)OHFeSe," Nature Communications, Nature, vol. 7(1), pages 1-8, April.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    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.
    2. Qiang Gao & Jin Mo Bok & Ping Ai & Jing Liu & Hongtao Yan & Xiangyu Luo & Yongqing Cai & Cong Li & Yang Wang & Chaohui Yin & Hao Chen & Genda Gu & Fengfeng Zhang & Feng Yang & Shenjin Zhang & Qinjun P, 2024. "ARPES detection of superconducting gap sign in unconventional superconductors," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40931-5. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.