2014 Fiscal Year Final Research Report
Real-time Observation of Dynamics of Stronglly Correlated Electron Systems by X-ray Free Electron Laser
| Project/Area Number |
25610089
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SASAGAWA Takao 東京工業大学, 応用セラミックス研究所, 准教授 (30332597)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 強相関電子系 / Ｘ線自由電子レーザー / 時間分解分光 / 電荷スピン秩序 |
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| Outline of Final Research Achievements |
In order to understand the unusual electronic states emerging in strongly correlated electron systems such as high temperature superconductivity and colossal magneto-resistance, we combined time-resolved femotosecond optical and resonant X-ray diffraction measurements on transition metal compounds having (stripe-type) charge and spin orderings.
We were able to reveal unforeseen photoinduced phase fluctuations of the charge order parameter. Relaxation of the phase fluctuations is found to be an order of magnitude slower than that of the order parameter's amplitude fluctuations, and thus limits charge order recovery. This new aspect of phase fluctuations provides a more holistic view of the phase's importance in ordering phenomena of quantum matter.
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| Free Research Field |
物質科学
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