| Project/Area Number |
15K17690
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
Heguri Satoshi 東北大学, 原子分子材料科学高等研究機構, 助教 (70611648)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | フラーレン超伝導体 / 超伝導 / 磁性 / モット転移 / 電子相関 / 電気輸送特性 / 極端条件下物性 / 分子性固体 / 電機輸送特性 / フラーレン / 金属絶縁体転移 / オンサイトクーロン反発 |
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| Outline of Final Research Achievements |
Eelectrical transport measurements have been very difficult in C60 superconductors and discussion has been made on a basis of experiments on magnetic probes. Temperature evolution of electrical resistivity of fcc fulleride superconductors RbxCs3-xC60 (0.35<x<3) is shown to be successfully measured under various pressure. Temperature dependence of electrical resistivity ranging from the Mott insulating state to a superconducting state via metallic phase was clearly observed. The profile of Mott insulator to metal boundary as a function of C603- volume was renewed and the different features of between the Jahn-Teller metal and the normal metal is not detected in the electrical transport measurements. In addition, on-site coulomb repulsion energy (U) is commented experimentally. We successfully demonstrated that the electronic states of fcc A3C60 system can be tuned systematically by the volume per C603- using the electrical transport measurements.
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