表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
第36回表面科学学術講演会特集号 [III]
2層グラフェン層間化合物の2次元超伝導
高橋 隆菅原 克明一ノ倉 聖高山 あかり長谷川 修司
著者情報
ジャーナル 認証あり

2017 年 38 巻 9 号 p. 460-465

詳細
抄録

We have fabricated alkali metal (Li, Rb, Cs) and alkaline-earth metal (Ca) intercalated bilayer graphene on SiC substrate, and characterized them by low-energy electron diffraction, angle-resolved photoemission spectroscopy, and 4-point-probe measurements. We observed a free-electron-like state in the center of the Brillouin zone, called “interlayer state”, as well as the folded π/π* bands in Rb-, Cs-, and Ca-intercalated graphene, while it was absent in Li counterpart. Ca-intercalated bilayer graphene shows the zero-resistance below 4K, indicative of the two-dimensional superconductivity. These results suggest that the interlayer state plays an important role for the superconductivity in intercalated bilayer graphene.

Fullsize Image
著者関連情報
前の記事 次の記事
feedback
Top