2015 Fiscal Year Final Research Report
Theory of Interactions between Different Scales in Field-Induced Nonlinear Phenomena in Molecular Conductors
| Project/Area Number |
23540426
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Chuo University (2012-2015)
Institute for Molecular Science (2011) |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TANAKA Yasuhiro 中央大学, 理工学部, 助教 (50541801)
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| Project Period (FY) |
2011-04-28 – 2016-03-31
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| Keywords | 分子性固体 / 有機導体 / 光誘起相転移 / 電荷秩序 / 絶縁体金属転移 / 負温度状態 |
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| Outline of Final Research Achievements |
Mechanisms for photoinduced modulation of electronic properties of molecular conductors are theoretically clarified by disentangling the hierarchical structures of electrons and phonons on different scales. In the case of charge disproportionation between dimers in strongly dimerized molecular conductors, photoexcitation induces intradimer electronic transitions, and then the structures of different-valent dimers are slowly changed into those of averaged-valent dimers. Finally, the electronic energy levels of these dimers resonate with each other and a large charge transfer occurs between them. Interdimer charge transfers can be directly controlled by continuous-wave lasers through dynamical localization, while they can be indirectly controlled by pulsed lasers of energy resonant with an intradimer transition. In general, a negative-temperature state and inversion of interactions are rather easily realized even by a symmetric monocycle pulse.
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| Free Research Field |
物性理論
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