2012 Fiscal Year Final Research Report
Theoretical study on peculiar structural transition and superconductivity of elements under high pressures
| Project/Area Number |
22340106
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kansai University |
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Principal Investigator |
SUZUKI Naoshi 関西大学, システム理工学部, 教授 (40029559)
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| Co-Investigator(Kenkyū-buntansha) |
ODA Tatsuki 金沢大学, 数物系科学, 教授 (30272941)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 超伝導 / 密度波 / 高圧極限物性 |
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| Research Abstract |
For calcium we have succeeded in predicting new high pressure phases V and VI, and also in clarifying that the phase III with simple cubic structure thermodynamically stabilizes at the temperatures of 10-300 K. For gold, we have predicted that the fcc structure with ABC stacking of the close-packed layer transforms into the ABCACB stacking structure at around 400 GPa. By applying our first-principles genetic algorithm code we have succeeded in identifying the crystal structures of phases V and VI of yttrium. As for superconductivity of gold and its alloys we have shown that the superconducting transition temperature TC of pure gold is quite low (～0.04 μK), but by alloying gold with indium TC dramatically increases to 0.1K for Au_<0.875>In_<0.125>.
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Research Products
(20 results)
