| Project/Area Number |
15560607
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
TAKAHARA Wataru Osaka University, Graduate School of Engineering, Assistant, 大学院工学研究科, 助手 (10252602)
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| Co-Investigator(Kenkyū-buntansha) |
MINAMI Fumiyoshi Osaka University, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (60135663)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Superconductivity / Transition temperature / Molecular orbital / DV-Xα method / B1-type compound / Nitride / Atomic displacement / Bond overlap population / 超伝導転移温度 / 酸化物 / NaCl型化合物 / 化学反応 / 波動関数 / 化学結合 |
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| Research Abstract |
Superconducting transition temperatures of B1 transition metal compounds (TiC, TiN, TiO, VC, VN, VO, ZrC, ZrN, ZrB, NbC, NbN and NbO) are investigated by the DV-Xα cluster method. The transition temperature is found to correlate with the ratio of bond overlap population in the cluster models where the center site atom is displaced. The molecular orbital response itself appears to be strongly related to the occurrence of superconductivity. Electron-phonon and/or magnetic interaction therefore appear not to be primary factors, and the orbital response itself would be the universal factor governing superconductivity. Assuming that superconductivity is a chemical reaction phenomenon in a solid, it would be useful to focus on the relation between superconducting properties and catalytic properties in the search for new superconductors.
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