| Budget Amount *help |
¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
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| Outline of Final Research Achievements |
We have succeeded in synthesizing electron-doped and hole-doped polycystalline samples of T'-La1.8Eu0.2CuO4-yFy and T'-La1.8-xEu0.2SrxCuO4. The carrier-doping dependence of Tc has been clarified. From NMR and muon spin relaxation measurements, it has been concluded that the superconductivity has d-wave symmetry due to the spin fluctuations. The origin of superconducting carriers may be due to the collapse of the so-called charge-transfer gap, but this has not yet been settled. Moreover, various measurements have been carried out for single crystals of electron-doped T'-Pr1.3-xLa0.7CexCuO4. It has been found that antiferromagnetic fluctuations are large in these crystals and it has also been concluded that the superconductivity has d-wave symmetry due to the spin fluctuations.
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