抄録
We report the direct evidence for superconductivity in Ca-intercalated bilayer graphene C6CaC6, which is regarded as the thinnest limit of Ca-intercalated graphite. We performed the electrical transport measurements with the in situ 4-point-probe method in ultrahigh vacuum under zero-or nonzero-magnetic field for pristine bilayer graphene, Li-intercalated bilayer graphene (C6LiC6) and C6CaC6 fabricated on SiC substrate. We observed that the zero-resistance state occurs in C6CaC6 with the onset temperature (Tc onset) of 4 K, while the Tc onset is gradually decreased upon applying the magnetic field. This directly proves the superconductivity origin of the zero resistance in C6CaC6. On the other hand, both pristine bilayer graphene and C6LiC6 exhibit nonsuperconducting behavior, suggesting the importance of intercalated atoms and its species to drive the superconductivity.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 2761-2765 |
| ページ数 | 5 |
| ジャーナル | ACS Nano |
| 巻 | 10 |
| 発行部数 | 2 |
| DOI | |
| 出版物ステータス | Published - 2016 2 23 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)
これを引用
Superconducting Calcium-Intercalated Bilayer Graphene. / Ichinokura, Satoru; Sugawara, Katsuaki; Takayama, Akari; Takahashi, Takashi; Hasegawa, Shuji.
：: ACS Nano, 巻 10, 番号 2, 23.02.2016, p. 2761-2765.研究成果: Article
}
TY - JOUR
T1 - Superconducting Calcium-Intercalated Bilayer Graphene
AU - Ichinokura, Satoru
AU - Sugawara, Katsuaki
AU - Takayama, Akari
AU - Takahashi, Takashi
AU - Hasegawa, Shuji
PY - 2016/2/23
Y1 - 2016/2/23
N2 - We report the direct evidence for superconductivity in Ca-intercalated bilayer graphene C6CaC6, which is regarded as the thinnest limit of Ca-intercalated graphite. We performed the electrical transport measurements with the in situ 4-point-probe method in ultrahigh vacuum under zero-or nonzero-magnetic field for pristine bilayer graphene, Li-intercalated bilayer graphene (C6LiC6) and C6CaC6 fabricated on SiC substrate. We observed that the zero-resistance state occurs in C6CaC6 with the onset temperature (Tc onset) of 4 K, while the Tc onset is gradually decreased upon applying the magnetic field. This directly proves the superconductivity origin of the zero resistance in C6CaC6. On the other hand, both pristine bilayer graphene and C6LiC6 exhibit nonsuperconducting behavior, suggesting the importance of intercalated atoms and its species to drive the superconductivity.
AB - We report the direct evidence for superconductivity in Ca-intercalated bilayer graphene C6CaC6, which is regarded as the thinnest limit of Ca-intercalated graphite. We performed the electrical transport measurements with the in situ 4-point-probe method in ultrahigh vacuum under zero-or nonzero-magnetic field for pristine bilayer graphene, Li-intercalated bilayer graphene (C6LiC6) and C6CaC6 fabricated on SiC substrate. We observed that the zero-resistance state occurs in C6CaC6 with the onset temperature (Tc onset) of 4 K, while the Tc onset is gradually decreased upon applying the magnetic field. This directly proves the superconductivity origin of the zero resistance in C6CaC6. On the other hand, both pristine bilayer graphene and C6LiC6 exhibit nonsuperconducting behavior, suggesting the importance of intercalated atoms and its species to drive the superconductivity.
KW - carbon
KW - electrical transport
KW - graphene
KW - graphite-intercalation-compound
KW - semiconductor surface
KW - superconductivity
KW - ultrahigh vacuum
UR - http://www.scopus.com/inward/record.url?scp=84960157630&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84960157630&partnerID=8YFLogxK
U2 - 10.1021/acsnano.5b07848
DO - 10.1021/acsnano.5b07848
M3 - Article
AN - SCOPUS:84960157630
VL - 10
SP - 2761
EP - 2765
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 2
ER -