| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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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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