グラファイト超薄膜の超伝導近接効果 Superconducting Proximity Effect in Multilayer Graphene

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Since the experimental discovery of graphene (single layer of graphite) in 2004, the research of single and multi-layer graphene has attracted much attention both theoretically and experimentally. In this article, from the experimental point of view, we describe the simple and special preparation of single and multi-layer graphene devices and report our recent stydy on superconducting proximity effect in multilayer graphene. As the gate voltage is swept, the proximity-induced superconductivity in multilayer graphene shows the bipolar behavior, from the hole supercurrent to the electron supercurrent. The following unusual facts are found: (1) for an arbitrary normal state resistance, the electron critical supercurrent is larger than the hole critical supercurrent, indicating the breakdown of the electron-hole symmetry. (2) The temperature dependence of the critical supercurrent cannot be explained by the standard theory for the superconducting proximity effect.

収録刊行物

  • 表面科学 = Journal of The Surface Science Society of Japan  

    表面科学 = Journal of The Surface Science Society of Japan 29(5), 315-320, 2008-05-10 

    The Surface Science Society of Japan

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各種コード

  • NII論文ID(NAID)
    10021166241
  • NII書誌ID(NCID)
    AN00334149
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    03885321
  • NDL 記事登録ID
    9507502
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z15-379
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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