2021 Fiscal Year Final Research Report
Photoinduced phase transition described by Hilbert space anomaly and quantum friction
| Project/Area Number |
17K05509
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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 I
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Iwano Kaoru 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 研究機関講師 (10211765)
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| Project Period (FY) |
2017-04-01 – 2022-03-31
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| Keywords | 光誘起相転移 / 強相関電子系 |
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| Outline of Final Research Achievements |
In this research, we have obtained the following three outcomes. First, we found a new type of photoinduced phase transition (PIPT), which is characterized by the charge-order (CO) transformations from the Y-type CO to other CO's. Second, we have clarified the deceleration mechanism of a domain growth, which is newly found to depend strongly on its gravity-center-momentum, K. Lastly, we treated the cases assuming X-ray pulses. We calculated the X-ray absorptions (XAS) and inelastic scatterings and presented expected spectral shapes in the PIPT systems.
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| Free Research Field |
光物性
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| Academic Significance and Societal Importance of the Research Achievements |
光誘起相転移は近年非常にホットなテーマであるが、まだまだ基礎概念的にも不十分なところが多く、本研究ではそれを上記3つの観点で明瞭化することが出来たと考えている。本研究で扱った現象は全て電子的光誘起相転移、すなわち電子系の自由度が主にに関係するという特徴がありフェムト秒オーダーの極めて超高速な現象であるので、今後の超高速デバイス等の開発における基礎理論としても有用であると期待される。
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