| Project/Area Number |
24740196
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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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 |
YADA Hiroyuki 東京大学, 新領域創成科学研究科, 助教 (60573144)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 光誘起相転移 / テラヘルツ分光 / 銅酸化物 / ヘテロ接合 |
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| Research Abstract |
Photocarrier dynamics in La1-xSrxCuO4 (x< 0.01, x=0.05, 0.08, 0.125) single-layer films , an anatase TiO2 single layers film, and heterostructure of them are investigated by optical-pump terahertz-probe measurements. In a La0.875Sr0.125CuO4 single layer film, optical excitation caused immediate destruction of the super conducting state and the recovery of the superconducting state took several tens of picoseconds. In an anatase TiO2 single layer film, Drude response was observed. In heterostructures, the emergence of the superconducting layer due to the photocarrier injections from TiO2 layer to cupurate layer was not observed. For the observation of the phenomena, fine control of the doping amount of the strontium in La1-xSrxCuO4 layer and an optistat which enables the measurement at 4K are probably necessary.
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