Signal transfer by stochastic resonance in cooperation with proton-fluctuation and enhancement of charge-transfer in molecular materials as biological model system
Project/Area Number |
18K18725
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 13:Condensed matter physics and related fields
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Research Institution | Tohoku University |
Principal Investigator |
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Project Period (FY) |
2018-06-29 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2020)
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Budget Amount *help |
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | ノイズスペクトロスコピー / 分子性物質 / プロトン / 分子性有機導体 / ノイズ / プロトン運動 |
Outline of Final Research Achievements |
In this study, we have developed a precise method for detecting conductance noise in molecular materials with strongly correlated electrons, in which pi-electron-based charge dynamics is significantly coupled with proton dynamics. We succeeded in measuring the conductance noise generated by pi-electrons coupling with proton and ethylene group dynamics. The Lorentzian-type noise spectrum due to the conductance fluctuation of a clear two-level state was observed to be superimposed on the 1/f type noise spectrum. The electric polarization state with a polar nano-region was clarified by noise spectroscopy.
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Academic Significance and Societal Importance of the Research Achievements |
今回の研究によるノイズ観測手法の確立およびパイ電子系ノイズ発生と電子状態の相関解明・発見は,ノイズスペクトロスコピーが電子的な強誘電性を生み出す分子性物質の物性物理解明に有効であることを明らかにした.さらに,生体系電子機能性の解明と機能模倣を目指す研究を実施する上で,ノイズスペクトロスコピーは,プロトン運動や構造ゆらぎと連動する電子伝達を調査するための高感度な観測ツールとなることを示すことができた.
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Report
(4 results)
Research Products
(14 results)
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[Presentation] Quenched disorder effect on the charge-glass forming ability in the charge ordered molecular compound q-(BEDT-TTF)2RbZn(SCN)42019
Author(s)
S. Ohkura, K. Hashimoto, R. Kobayashi, Y. Karakane, S. Iguchi, Y. Ikemoto, T. Moriwaki, M. Suda, H. Yamamoto, T. Sasaki
Organizer
13th International Symposium on Crystalline Organic Metals, Superconductors and Magnets (ISCOM2019)
Related Report
Int'l Joint Research
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[Presentation] 水素結合型モット絶縁体Cat-EDT系における量子常誘電・常磁性状態2019
Author(s)
藤井桜子, 下澤雅明, 近藤潤, 杉井かおり, 山下穣, 上田顕, 森初果, 杉浦栞理, 寺嶋太一, 宇治進也, 橋本顕一郎, 井口敏, 佐々木孝彦
Organizer
日本物理学会第74回年次大会(2019年)
Related Report
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