| Project/Area Number |
25400360
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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 II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
朝光 敦 足利工業大学, 工学部, 教授 (80311645)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 鉄系超伝導体 / ネマティック / 熱起電力 / 異方性 / ノイズ測定 / 面内異方性 / ネマティック秩序 / ネルンスト効果 / ネマティック電子相 / 電荷秩序 / ネマティック相 |
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| Outline of Final Research Achievements |
We investigated the in-plane anisotropy of the thermopower and electrical resistivity on detwinned single crystals of Iron based superconductor. In the case of BaFe2As2, the in-plane anisotropy of the resistivity was clearly observed far above the magnetostructural transition temperature T_AFO . While, the thermopower showed the in-plane anisotropy only below T_AFO . These results are associated with the different origin of the anisotropy above and below T_AFO . Since the thermopower does not depend on the scattering time, the anisotropy of the resistivity above T_AFO is considered to be due to the anisotropic scattering. On the other hand, the anisotropy in the thermopower below T_AFO is ascribed to the reconstructed Fermi surface.
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