IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v5y2014i1d10.1038_ncomms6044.html
   My bibliography  Save this article

Tuning the band structure and superconductivity in single-layer FeSe by interface engineering

Author

Listed:
  • R. Peng

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • H. C. Xu

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • S. Y. Tan

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • H. Y. Cao

    (State Key Laboratory of Surface Physics, Fudan University
    Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University)

  • M. Xia

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • X. P. Shen

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • Z. C. Huang

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • C.H.P. Wen

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • Q. Song

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • T. Zhang

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • B. P. Xie

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

  • X. G. Gong

    (State Key Laboratory of Surface Physics, Fudan University
    Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University)

  • D. L. Feng

    (State Key Laboratory of Surface Physics, Fudan University
    Advanced Materials Laboratory, Fudan University)

Abstract

The interface between transition metal compounds provides a rich playground for emergent phenomena. Recently, significantly enhanced superconductivity has been reported for single-layer FeSe on Nb-doped SrTiO3 substrate. Yet it remains mysterious how the interface affects the superconductivity. Here we use in situ angle-resolved photoemission spectroscopy to investigate various FeSe-based heterostructures grown by molecular beam epitaxy, and uncover that electronic correlations and superconducting gap-closing temperature (Tg) are tuned by interfacial effects. Tg up to 75 K is observed in extremely tensile-strained single-layer FeSe on Nb-doped BaTiO3, which sets a record high pairing temperature for both Fe-based superconductor and monolayer-thick films, providing a promising prospect on realizing more cost-effective superconducting device. Moreover, our results exclude the direct correlation between superconductivity and tensile strain or the energy of an interfacial phonon mode, and highlight the critical and non-trivial role of FeSe/oxide interface on the high Tg, which provides new clues for understanding its origin.

Suggested Citation

  • R. Peng & H. C. Xu & S. Y. Tan & H. Y. Cao & M. Xia & X. P. Shen & Z. C. Huang & C.H.P. Wen & Q. Song & T. Zhang & B. P. Xie & X. G. Gong & D. L. Feng, 2014. "Tuning the band structure and superconductivity in single-layer FeSe by interface engineering," Nature Communications, Nature, vol. 5(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6044
    DOI: 10.1038/ncomms6044
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/ncomms6044
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/ncomms6044?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. Yuanhe Song & Zheng Chen & Qinghua Zhang & Haichao Xu & Xia Lou & Xiaoyang Chen & Xiaofeng Xu & Xuetao Zhu & Ran Tao & Tianlun Yu & Hao Ru & Yihua Wang & Tong Zhang & Jiandong Guo & Lin Gu & Yanwu Xie, 2021. "High temperature superconductivity at FeSe/LaFeO3 interface," Nature Communications, Nature, vol. 12(1), pages 1-8, 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:5:y:2014:i:1:d:10.1038_ncomms6044. 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.