2014 Fiscal Year Final Research Report
Study on aromatic hydrocarbon superconductors
| Project/Area Number |
22244045
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Okayama University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
KAMBE Takashi 岡山大学, 大学院自然科学研究科, 准教授 (00277386)
IWASA Yoshihiro 東京大学, 大学院工学系研究科, 教授 (20184864)
OKAMOTO Hideki 岡山大学, 大学院自然科学研究科, 准教授 (30204043)
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Keywords | 超伝導 / 金属ドーピング / フェナセン系有機分子 / グラフェン / グラファイト / 二次元層状分子 / 圧力効果 |
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| Outline of Final Research Achievements |
The first discovery of superconductivity in solids of metal doped aromatic hydrocarbons was made for K-doped picene (Kxpicene). Its superconducting transition temperatures (Tc's) were 7 and 18 K. During this project, we pursued to make new superconductors using aromatic hydrocarbons. Various techniques such as high-temperature annealing method, liquid ammonia method, and electrochemical process were used for metal doping. The superconducting phases of Kxpicene and Rbxpicene exhibiting more than 10% superconducting fraction were successfully prepared in this project. The zero-resistance was confirmed in Kxpicene. With applying pressure, the Tc of 7 K phase of Kxpicene monotonically decreased, while the Tc's of 14 and 18 K phases increased, implying that 14 and 18 K phases are non-BCS type. Furthermore, superconductors were fabricated by doping various types of phenacene molecules with metals. The chemical composition and crystal structures of superconducting phases were investigated.
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| Free Research Field |
物性ＩＩ
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