2016 Fiscal Year Final Research Report
Observation of a charge order by noise measurement in High-Tc superconductor
| 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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| Project Period (FY) |
2013-04-01 – 2017-03-31
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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 |
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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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| Free Research Field |
固体物理
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