Multi-dimensional wave-packet dynamics in potoinduced phase transition materials
| Project/Area Number |
18340079
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SUEMOTO Tohru The University of Tokyo, Institute for Solid State Physics, Professor (50134052)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAJIMA Makoto The University of Tokyo, Institute for Solid State Physics, Research Associate (40361662)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥16,140,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥840,000)
Fiscal Year 2007: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2006: ¥12,500,000 (Direct Cost: ¥12,500,000)
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| Keywords | photoinduced phase transition / wave packet / Lissajous motion / femtosecond / time resolved luminescence / halogen bridged platinum comples / halogen bridged palladium complex / F-center / 発光 / 白金錯体 / パラジウム錯体 / シトクロムc / ダイナミクス |
|---|
| Research Abstract |
<Transition metal complexes> We investigated time resolved luminescence in Pt-Br at low temperature. We have found that the luminescence intensity increases anomalously at the low energy end of the wave packet (WP) oscillation. When the main part of the WP turns back to the high energy end, some part goes opposite direction. By comparing the results with a model calculation, we concluded that the WP splits on the top of the adiabatic potential curve connecting the self-trapped-exciton (STE) and the soliton pair state.
We investigated the time resolved luminescence of Pd-Br complexes. We found that the STE state does not exist in this material, in spite of the charge-density-wave (CDW) ground state. The WP propagates to the state lower than the band gap without oscillation. This reflects the WP dynamics representing the phase transformation from Peierls insulator to Mott insulator.
<F-centers in alkali halides> We observed the WP dynamics in F-centers. We found an asymmetric spectrum and unequal decay dynamics at high and low energy sides of the luminescence peak. This seems to originate from the large anharmonicity due to anticrossing between the 2s and 2p states. This is a good example of the WP dynamics on the potential curve with a crossing, which will useful for understanding the dynamics of photoinduced phase transitions.
<Bio-materials> We observed the untrafast luminescence in aqueous solution of cytochrome c for the first time and assigned a luminescence peak to Q band. The result indicates that the non-radiative transfer of the electron to the d-orbital of Fe ion occurs within 300 fs. A long lifetime component is found and assigned to the state with a dessociated methionine group. These results clarify the relaxation dynamics of cytochrome c, which has not been known due to low luminescence intensity.
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Report
(3 results)
Research Products
(78 results)
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[Presentation] グラファイトの時間分解光電子分光2008
Author(s)
石田 行章, 富樫 格, 山本 和, 田中 正志, 谷内 敏之, 下山田 篤史, 石坂 香子, 木須 孝幸, 中鳴 誠, 末元 徹, 辛埴
Organizer
日本物理学会第63回年次大会
Place of Presentation
近畿大学
Year and Date
2008-03-24
Related Report
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[Presentation] 時間分解光電子分光によるBi2212の研究2008
Author(s)
田中 正志, 富樫 格, 石田 行章, 山本 和矢, 谷内 敏之, 下山田 篤志, 石坂 香子, 木須 孝幸, 中嶋 誠, 末元 徹, 茂筑 高士, 中根 茂行, 平田 和人, 辛埴
Organizer
日本物理学会第63回年次大会
Place of Presentation
近畿大学
Year and Date
2008-03-24
Related Report
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[Presentation] レーザー高調波を用いた時間分解光電子分光による光誘起相転移の研究52007
Author(s)
富樫 格, 山本 和矢, 石田 行章, 田中 正志, 下山 田篤, 木須 孝幸, 石坂 香子, 高田 泰孝, Ashish Chainani, 辛埴, 中嶋 誠, 末元 徹
Organizer
日本物理学会第62回年次大会
Place of Presentation
北海道大学
Year and Date
2007-09-22
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[Book] 光物性の基礎と応用2006
Author(s)
末元 徹(分担執筆)
Publisher
光物性研究会組織委員会編(オプトロニクス社)
Description
「研究成果報告書概要(和文)」より
Related Report
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