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- Satoru Ichinokura
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
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- Katsuaki Sugawara
- WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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- Akari Takayama
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
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- Takashi Takahashi
- WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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- Shuji Hasegawa
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
書誌事項
- 公開日
- 2016-01-29
- 資源種別
- journal article
- 権利情報
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- http://pubs.acs.org/page/policy/authorchoice_termsofuse.html
- DOI
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- 10.1021/acsnano.5b07848
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
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 (T(c)(onset)) of 4 K, while the T(c)(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.
収録刊行物
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- ACS Nano
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ACS Nano 10 (2), 2761-2765, 2016-01-29
American Chemical Society (ACS)
