| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
A hydrogen-substituted iron-based superconductor has a unique parent phase that loses spatial inversion symmetry and a superconducting phase adjacent to it. Since the superconducting phase is regarded as the fluctuations of superconductivity are ordered, the relationship between fluctuations in the ferroelectric metallic state and superconductivity is interesting. From the X-ray diffraction in LaFeAsO1-xHx, we found that the lattice symmetry lowering -nematic state- from a much higher temperature of the parent phase. From EXAFS measurement, we discovered that there is a local inversion symmetry breaking -ferroelectric fluctuation- from a much higher temperature region. This result suggests that the fluctuation of polar metal may be related to superconductivity.
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