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p-wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor

Author

Listed:
  • A. Di Bernardo

    (University of Cambridge)

  • O. Millo

    (Racah Institute of Physics and the Hebrew University Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem)

  • M. Barbone

    (Cambridge Graphene Centre, University of Cambridge)

  • H. Alpern

    (Racah Institute of Physics and the Hebrew University Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem)

  • Y. Kalcheim

    (Racah Institute of Physics and the Hebrew University Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem)

  • U. Sassi

    (Cambridge Graphene Centre, University of Cambridge
    Present address: Nokia Bell Labs, Broers Building, Cambridge CB3 0FA, UK)

  • A. K. Ott

    (Cambridge Graphene Centre, University of Cambridge)

  • D. De Fazio

    (Cambridge Graphene Centre, University of Cambridge)

  • D. Yoon

    (Cambridge Graphene Centre, University of Cambridge)

  • M. Amado

    (University of Cambridge)

  • A. C. Ferrari

    (Cambridge Graphene Centre, University of Cambridge)

  • J. Linder

    (Norwegian University of Science and Technology)

  • J. W. A. Robinson

    (University of Cambridge)

Abstract

Electron pairing in the vast majority of superconductors follows the Bardeen–Cooper–Schrieffer theory of superconductivity, which describes the condensation of electrons into pairs with antiparallel spins in a singlet state with an s-wave symmetry. Unconventional superconductivity was predicted in single-layer graphene (SLG), with the electrons pairing with a p-wave or chiral d-wave symmetry, depending on the position of the Fermi energy with respect to the Dirac point. By placing SLG on an electron-doped (non-chiral) d-wave superconductor and performing local scanning tunnelling microscopy and spectroscopy, here we show evidence for a p-wave triggered superconducting density of states in SLG. The realization of unconventional superconductivity in SLG offers an exciting new route for the development of p-wave superconductivity using two-dimensional materials with transition temperatures above 4.2 K.

Suggested Citation

  • A. Di Bernardo & O. Millo & M. Barbone & H. Alpern & Y. Kalcheim & U. Sassi & A. K. Ott & D. De Fazio & D. Yoon & M. Amado & A. C. Ferrari & J. Linder & J. W. A. Robinson, 2017. "p-wave triggered superconductivity in single-layer graphene on an electron-doped oxide superconductor," Nature Communications, Nature, vol. 8(1), pages 1-10, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14024
    DOI: 10.1038/ncomms14024
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