| Budget Amount *help |
¥44,070,000 (Direct Cost: ¥33,900,000、Indirect Cost: ¥10,170,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2015: ¥29,380,000 (Direct Cost: ¥22,600,000、Indirect Cost: ¥6,780,000)
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| Outline of Final Research Achievements |
We investigated the nonequilibrium dynamics of superconductivity by using the ultrafast coherent light sources ranging from near infrared to terahertz, aiming at the light-control of superconductors. In particular, we studied the dynamics of superconducting order parameter through the observation of the Higgs mode, namely the collective amplitude mode of order parameter and the Josephson plasma resonance for the case of high Tc cuprate superconductors. We succeeded in the observation of Higgs mode high Tc cuprate superconductors through the experimental scheme of pump-probe and third harmonic generation. We also succeeded the observation of Higgs modes in multiband superconductors, such as iron-based superconductors and MgB2, paving a new pathway to control the order parameter by light. We also revealed the effect of strong photoexcitation in single-layer cuprate superconductors in view of light-induced superconductivity.
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