IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v5y2014i1d10.1038_ncomms4257.html
   My bibliography  Save this article

Observation of a universal donor-dependent vibrational mode in graphene

Author

Listed:
  • A. V. Fedorov

    (IFW Dresden, P.O. Box 270116
    St Petersburg State University, Ulianovskaya 1)

  • N. I. Verbitskiy

    (Faculty of Physics, University of Vienna, Strudlhofgasse 4
    Moscow State University, Leninskiye Gory 1/3)

  • D. Haberer

    (IFW Dresden, P.O. Box 270116
    University of California at Berkeley)

  • C. Struzzi

    (Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5)

  • L. Petaccia

    (Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5)

  • D. Usachov

    (St Petersburg State University, Ulianovskaya 1)

  • O. Y. Vilkov

    (St Petersburg State University, Ulianovskaya 1)

  • D. V. Vyalikh

    (St Petersburg State University, Ulianovskaya 1
    Institut für Festkörperphysik, TU Dresden, Mommsenstrasse 13)

  • J. Fink

    (IFW Dresden, P.O. Box 270116)

  • M. Knupfer

    (IFW Dresden, P.O. Box 270116)

  • B. Büchner

    (IFW Dresden, P.O. Box 270116)

  • A. Grüneis

    (IFW Dresden, P.O. Box 270116
    Faculty of Physics, University of Vienna, Strudlhofgasse 4)

Abstract

Electron–phonon coupling and the emergence of superconductivity in intercalated graphite have been studied extensively. Yet, phonon-mediated superconductivity has never been observed in the 2D equivalent of these materials, doped monolayer graphene. Here we perform angle-resolved photoemission spectroscopy to try to find an electron donor for graphene that is capable of inducing strong electron–phonon coupling and superconductivity. We examine the electron donor species Cs, Rb, K, Na, Li, Ca and for each we determine the full electronic band structure, the Eliashberg function and the superconducting critical temperature Tc from the spectral function. An unexpected low-energy peak appears for all dopants with an energy and intensity that depend on the dopant atom. We show that this peak is the result of a dopant-related vibration. The low energy and high intensity of this peak are crucially important for achieving superconductivity, with Ca being the most promising candidate for realizing superconductivity in graphene.

Suggested Citation

  • A. V. Fedorov & N. I. Verbitskiy & D. Haberer & C. Struzzi & L. Petaccia & D. Usachov & O. Y. Vilkov & D. V. Vyalikh & J. Fink & M. Knupfer & B. Büchner & A. Grüneis, 2014. "Observation of a universal donor-dependent vibrational mode in graphene," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4257
    DOI: 10.1038/ncomms4257
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/ncomms4257
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/ncomms4257?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
    ---><---

    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_ncomms4257. 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.