2020 Fiscal Year Final Research Report
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 |
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| Review Section |
Medium-sized Section 13:Condensed matter physics and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2018-06-29 – 2021-03-31
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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 |
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| 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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| Free Research Field |
物性物理実験
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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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