Superconducting graphene sheets in CaC$_{6}$ enabled by phonon-mediated interband interactions

ORAL

Abstract

The superconducting mechanism of graphite intercalation compounds has been under intense debate. To reveal this mechanism, we studied a prototypical compound CaC$_{6}$ using angle-resolved photoelectron spectroscopy. Both the calcium-derived and graphene-derived bands were clearly resolved. We performed analysis on the superconducting gaps and electron-phonon coupling constants. We will also discuss the important implications in fabricating superconducting graphene devices.

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Authors

  • Shuolong Yang

    • Stanford University

  • Jonathan Sobota

    • Stanford University

  • Chris Howard

    • University College London

  • Chris Pickard

    • University College London

  • Makoto Hashimoto

    • SLAC National Accelerator Laboratory

  • Donghui Lu

    • SLAC National Accelerator Laboratory

  • Sung-Kwan Mo

    • Lawrence Berkeley National Laboratory

  • Patrick Kirchmann

    • SLAC National Accelerator Laboratory

  • Zhi-Xun Shen

    • Stanford University