Band Gap Formation in Graphene by Hybridization with Hex-Au(001) Reconstructed Surface

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  • TERASAWA Tomo-o
    Advanced Science Research Center, Japan Atomic Energy Agency Institute of Industrial Science, The University of Tokyo
  • MATSUNAGA Kazuya
    Graduate School of Engineering, Nagoya University
  • HAYASHI Naoki
    Graduate School of Engineering, Nagoya University
  • ITO Takahiro
    Graduate School of Engineering, Nagoya University Synchrotron radiation Research center, Nagoya University
  • TANAKA Shin-ichiro
    SANKEN, The Institute of Scientific and Industrial Research, Osaka University
  • YASUDA Satoshi
    Advanced Science Research Center, Japan Atomic Energy Agency
  • ASAOKA Hidehito
    Advanced Science Research Center, Japan Atomic Energy Agency

Bibliographic Information

Other Title
  • グラフェンとHex-Au(001)再構成表面の軌道混成によるバンドギャップの形成
  • グラフェン ト Hex-Au(001)サイコウセイ ヒョウメン ノ キドウ コンセイ ニ ヨル バンドギャップ ノ ケイセイ

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Abstract

<p>As Au(001) surfaces exhibit a quasi-one-dimensional corrugated structure, Hex-Au(001), its periodicity was predicted to change the electronic structure of graphene when graphene was grown on this surface. Furthermore, the hybridization between graphene and Au is known to introduce bandgap and spin polarization into graphene. Here, we report angle-resolved photoemission spectroscopy and density functional theory calculation of graphene on a Hex-Au(001) surface. A bandgap of 0.2 eV in the graphene Dirac cone was observed at the crossing point of the graphene Dirac cone and Au 6sp bands, indicating that the origin of the bandgap formation was the hybridization between the graphene Dirac cone and Au 6sp band. We discussed the hybridization mechanism and anticipated spin injection into the graphene Dirac cone.</p>

Journal

  • Vacuum and Surface Science

    Vacuum and Surface Science 66 (9), 525-530, 2023-09-10

    The Japan Society of Vacuum and Surface Science

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