| Project/Area Number |
26288035
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Functional solid state chemistry
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Research Collaborator |
Otsuka Akihiro
Nakano Yoshiaki
Ishikawa Manabu
Kitagawa Hiroshi
Maesato Mitsuhiko
Yoshida Yukihiro
Uruichi Mikio
Koshihara Shin-ya
Onda Ken
Okimoto Yoichi
Tanaka Koichiro
Saito Gunzi
Hiramatsu Takaaki
Shimizu Yasuhiro
Ito Hiroshi
Kishida Hideo
Haruki Rie
Kumai Reiji
Adachi Shinichi
Miller Dwayne, R. J.
Khasanov Salavat, Salim'yanovich
Konarev Dmitry, Valentinovich
Lyubovskaya Rimma, N.
Shao Xiangfeng
Kushch Nataliya, D.
Yagubskii Eduard, B.
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| Project Period (FY) |
2014-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
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| Keywords | 分子性固体 / 分子性導体 / 有機導体 / 強相関電子系 / 結晶工学 / 磁性 / 多重不安定性 / 外場応答 / 強電子相関系 / 有機動体 |
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| Outline of Final Research Achievements |
This project aimed to develop new types of electronic phase transition phenomena for molecular crystals. As the main themes, (1) the chemical modulation of the ethylenedioxytetrathiafulvalene (EDO-TTF) salt showing the multi-instability of metallic state was performed to induce the different kind of photo-induced response comparing with the original material and (2) a peculiar charge-order melting, at which only the restricted parts in the periodic crystal structure show the homogenization of the molecular charge, was found in a multi-component charge-ordered material designed by our unique concept. Also, (3) new radical anion salts of fullerenes and macrocyclic compounds were prepared by employing strong reductants. As a result, the magnetic phase transition associated with the modulation of molecular charges was observed in a fullerene salt.
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| Academic Significance and Societal Importance of the Research Achievements |
温度・圧力などの変化や光照射などの刺激に対して電子状態の変化を伴う応答(相転移)を起こす物質の研究は、電子材料開発に向けた基礎研究であり、同時に基礎科学そのものの重要課題である。新規物質の開拓を主たる手法とした本研究により、化学組成を僅かに変化させることによりパルス光照射に対する応答が異なる物質群が得られ、また、温度変化に対して結晶内での電子の分布様式が従来には見られなかった変化を起こす物質を得るなど、新規な現象を見出すことが出来た。これらの成果は物質中の電子の振舞いを理解しようとする基礎科学的な研究分野に新たな検討対象を与えた。
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