| Project/Area Number |
11640349
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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 |
固体物性Ⅱ(磁性・金属・低温)
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| Research Institution | Osaka University |
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Principal Investigator |
SHIMIZU Katsuya Graduate School of Engineering Science, Osaka University Research Assistant, 大学院・基礎工学研究科, 助手 (70283736)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAYAMA Atsuko Coltd Science Service Researcher, 研究員
SHIROTANI Ichimin Department of Electrical and Electronic Engineering, Muroran Institute of Technology Professor, 工学部, 教授 (90110692)
AMAYA Kiichi Graduate School of Engineering Science, Osaka University Professor, 大学院・基礎工学研究科, 教授 (80029503)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1999: ¥2,900,000 (Direct Cost: ¥2,900,000)
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| Keywords | Organic Molecule / Insulator-Metal Transition / Superconductivity / Resistance Measurement |
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| Research Abstract |
Among the similar organic compounds, iodanil shows the best conductivity with in the measured pressures of 30 GPa without showing any tendency of up turn of resistivity at the highest-pressure region. The metallization of these simple organic crystals is of interest in the comparison with other conductors based on radical cation or anion salts.
In the case of iodanil resistance drop attributed to superconducting transition was reported at pressure of 52 GPa and temperature of around 2 K.Iodanil is the first monomer crystal that becomes superconducting. In order to study the mechanism of metallization and super-conductivity of organic monomer crystal including iodanil, we measured electrical resistance of hexaiodobenzene under pressures at wide temperature range of 50 mK to 300 K.
Hexaiodobenzene (C_6I_6) has a similar molecular structure to iodanil and is a good example to study the mechanism of the pressure-induced metallization of organic monomolecular crystals. We observed an insulator-to-metal transition at 35 GPa for hexaiodobenzene and superconductivity around 2 K in the metallic phase and these value was found to be closed to those of iodanil.
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