Structure of superconducting Ca-intercalated bilayer Graphene/SiC studied using total-reflection high-energy positron diffraction

Y. Endo*, Y. Fukaya, I. Mochizuki, A. Takayama, T. Hyodo, S. Hasegawa

*この研究の対応する著者

研究成果: Article査読

8 被引用数 (Scopus)

抄録

We have investigated the atomic structure of superconducting Ca-intercalated bilayer graphene on a SiC(0001) substrate using total-reflection high-energy positron diffraction. By comparing the experimental rocking-curves with ones calculated for various structural models using a full-dynamical theory, we have found that Ca atoms are intercalated in the graphene-buffer interlayer, rather than between the two graphene layers. From transport measurements, the superconducting transition was observed to be at Tc onset = 4 K for this structure. This study is the first to clearly identify the relation between the atomic arrangement and superconductivity in Ca-intercalated bilayer graphene.

本文言語English
ページ(範囲)857-862
ページ数6
ジャーナルCarbon
157
DOI
出版ステータスPublished - 2020 2

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)

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