2015 Fiscal Year Final Research Report
Nodal structure of unconventional superconductors probed by flux-flow transport measurements
| Project/Area Number |
25400383
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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 | Hiroshima Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 異方的超伝導 / 超伝導ギャップ / 磁束フロー抵抗 |
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| Outline of Final Research Achievements |
The symmetry of the pairing state of Cooper pairs is of great interest. It has been extensively investigated by some experimental methods such as specific heat and thermal conductivity measurements for many unconventional superconductors. However, it is very difficult to perform these experiments under pressure despite the discoveries of many pressure-induced superconductors. Thus, the establishment of experimental method to determine the gap structure of the pressure-induced superconductivity is a primly important issue. To test the experimental determination of the gap structure, we measured the flux-flow resistance (FFR) for some quasi-two-dimensional (Q2D) organic superconductors with d-wave gap structure in magnetic field rotating within the 2D conducting layer. We find the clear fourfold symmetry of the FFR related to the superconducting gap structure for highly 2D systems, whilst the twofold symmetry associated with the Fermi surface anisotropy for anisotropic 3D systems.
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| Free Research Field |
物性物理学
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