| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
1. Clarification of the diverse nematic order in iron-based superconductors: the 45°rotated nematic order in highly hole-doped systems and the hidden nematic order in BaFe2As2 and NaFeAs above the structural transition temperature were understood in a unified manner by solving the DW equation, which incorporates higher-order many-body effects.
2. Nematic order in magic-angle twisted bilayer graphene (MATBG): In MATBG, SU(4) symmetry exists in the local Coulomb interaction due to the composite spin and valley degrees of freedom. It is shown that the SU(4)-fluctuation interference causes the nematic bond order.
In summary, it is shown that the novel order is explained by the multi-orbital higher-order many-body effect.
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