IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v8y2017i1d10.1038_ncomms14988.html
   My bibliography  Save this article

Enhanced superconductivity accompanying a Lifshitz transition in electron-doped FeSe monolayer

Author

Listed:
  • X. Shi

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences)

  • Z-Q Han

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    Beijing Key Laboratory of Opto-Electronic Functional Materials and Micro-nano Devices, Renmin University of China)

  • X-L Peng

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences)

  • P. Richard

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    Collaborative Innovation Center of Quantum Matter
    School of Physical Sciences, University of Chinese Academy of Sciences)

  • T. Qian

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    Collaborative Innovation Center of Quantum Matter)

  • X-X Wu

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences)

  • M-W Qiu

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences)

  • S. C. Wang

    (Beijing Key Laboratory of Opto-Electronic Functional Materials and Micro-nano Devices, Renmin University of China)

  • J. P. Hu

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    Collaborative Innovation Center of Quantum Matter
    School of Physical Sciences, University of Chinese Academy of Sciences)

  • Y-J Sun

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences)

  • H. Ding

    (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    Collaborative Innovation Center of Quantum Matter
    School of Physical Sciences, University of Chinese Academy of Sciences)

Abstract

The origin of enhanced superconductivity over 50 K in the recently discovered FeSe monolayer films grown on SrTiO3 (STO), as compared to 8 K in bulk FeSe, is intensely debated. As with the ferrochalcogenides AxFe2−ySe2 and potassium-doped FeSe, which also have a relatively high-superconducting critical temperature (Tc), the Fermi surface (FS) of the FeSe/STO monolayer films is free of hole-like FS, suggesting that a Lifshitz transition by which these hole FSs vanish may help increasing Tc. However, the fundamental reasons explaining this increase of Tc remain unclear. Here we report a 15 K jump of Tc accompanying a second Lifshitz transition characterized by the emergence of an electron pocket at the Brillouin zone centre, which is triggered by high-electron doping following in situ deposition of potassium on FeSe/STO monolayer films. Our results suggest that the pairing interactions are orbital dependent in generating enhanced superconductivity in FeSe.

Suggested Citation

  • X. Shi & Z-Q Han & X-L Peng & P. Richard & T. Qian & X-X Wu & M-W Qiu & S. C. Wang & J. P. Hu & Y-J Sun & H. Ding, 2017. "Enhanced superconductivity accompanying a Lifshitz transition in electron-doped FeSe monolayer," Nature Communications, Nature, vol. 8(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14988
    DOI: 10.1038/ncomms14988
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/ncomms14988
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/ncomms14988?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
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Lu Cao & Wenyao Liu & Geng Li & Guangyang Dai & Qi Zheng & Yuxin Wang & Kun Jiang & Shiyu Zhu & Li Huang & Lingyuan Kong & Fazhi Yang & Xiancheng Wang & Wu Zhou & Xiao Lin & Jiangping Hu & Changqing J, 2021. "Two distinct superconducting states controlled by orientations of local wrinkles in LiFeAs," Nature Communications, Nature, vol. 12(1), pages 1-7, 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:8:y:2017:i:1:d:10.1038_ncomms14988. 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.

    We have no bibliographic references for this item. You can help adding them by using 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.