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Evidence of cooperative effect on the enhanced superconducting transition temperature at the FeSe/SrTiO3 interface

Author

Listed:
  • Q. Song

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • T. L. Yu

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • X. Lou

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • B. P. Xie

    (Fudan University)

  • H. C. Xu

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • C. H. P. Wen

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Q. Yao

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • S. Y. Zhang

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

  • X. T. Zhu

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

  • J. D. Guo

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Collaborative Innovation Center of Quantum Matter)

  • R. Peng

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • D. L. Feng

    (Fudan University
    Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

Abstract

At the interface between monolayer FeSe films and SrTiO3 substrates the superconducting transition temperature (Tc) is unexpectedly high, triggering a surge of excitement. The mechanism for the Tc enhancement has been the central question, as it may present a new strategy for seeking out higher Tc materials. To reveal this enigmatic mechanism, by combining advances in high quality interface growth, 16O $$\leftrightarrow$$ ↔ 18O isotope substitution, and extensive data from angle resolved photoemission spectroscopy, we provide striking evidence that the high Tc in FeSe/SrTiO3 is the cooperative effect of the intrinsic pairing mechanism in the FeSe and interactions between the FeSe electrons and SrTiO3 phonons. Furthermore, our results point to the promising prospect that similar cooperation between different Cooper pairing channels may be a general framework to understand and design high-temperature superconductors.

Suggested Citation

  • Q. Song & T. L. Yu & X. Lou & B. P. Xie & H. C. Xu & C. H. P. Wen & Q. Yao & S. Y. Zhang & X. T. Zhu & J. D. Guo & R. Peng & D. L. Feng, 2019. "Evidence of cooperative effect on the enhanced superconducting transition temperature at the FeSe/SrTiO3 interface," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08560-z
    DOI: 10.1038/s41467-019-08560-z
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    Cited by:

    1. Ruochen Shi & Qize Li & Xiaofeng Xu & Bo Han & Ruixue Zhu & Fachen Liu & Ruishi Qi & Xiaowen Zhang & Jinlong Du & Ji Chen & Dapeng Yu & Xuetao Zhu & Jiandong Guo & Peng Gao, 2024. "Atomic-scale observation of localized phonons at FeSe/SrTiO3 interface," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. 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.

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