| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Research Abstract |
We study mechanism of exotic superconductivity in strongly correlated electron system under high pressure, and challenge to elucidate novel pairing interactions(valence and/or orbital fluctuations), resulting in strong coulomb interaction between the electrons. NQR frequency(^<63>ν_Q) for^<63> Cu nuclei in CeCu_2Si_2 deviates from the linear pressure dependence. The observed downward deviation of^<63>ν_Q is associated with increase of Ce valence. Above 4. 5 GPa, the linear relation of^<63>ν_Q is observed again, closely related to sharp crossover to high valence state.
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