Correlation Strength Crossover of Auger Recombination Process
| Project/Area Number |
23540367
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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 | Nagoya Institute of Technology |
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Principal Investigator |
TAKAHASHI Akira 名古屋工業大学, 工学(系)研究科(研究院), 教授 (80212009)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2012: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2011: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | オージェ緩和 / 強相関電子系 / 1次元モット絶縁体 / 超高速緩和 / ホロンとダブロン / 光励起状態 |
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| Research Abstract |
We theoretically investigate the dynamics of photoexcited states in one-dimensional Mott insulators. We adopt the Pariser-Parr-Pople model, and numerically calculate the time development of the nonequilibrium state excited by a light pulse. We investigate the dependence of the dynamics on the Coulomb correlation strength. In the strong correlation region, the Auger recombination where two bound holon-doublon pairs decay into one unbound holon-doublon pair, dominates the decay dynamics. From the strong correlation region to the intermediate correlation region, the Auger recombination process is always dominant, but the charge carries involved in the process cannot be described by a holon and a doublon in the intermediate correlation region. In the crossover region between these two regions, the decay time constant and the Auger coefficient are strongly enhanced, and the decay time constant is consistent with the experimentally obtained value in one-dimensional Mott insulators.
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Report
(4 results)
Research Products
(6 results)
