| Budget Amount *help |
¥46,540,000 (Direct Cost: ¥35,800,000、Indirect Cost: ¥10,740,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2011: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2010: ¥22,360,000 (Direct Cost: ¥17,200,000、Indirect Cost: ¥5,160,000)
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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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