2015 Fiscal Year Final Research Report
Theoretical study of metallization and superconductivity of hydrides
| Project/Area Number |
25400353
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
Abe Kazutaka 東北大学, 電気通信研究所, 助教 (00361197)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 金属水素化合物 / 第一原理計算 / 超伝導 |
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| Outline of Final Research Achievements |
Although the typical hydride of Ge is GeH4 at ambient pressure, GeH3 has been predicted to be stabilized beyond 175 GPa. The proposed phases are metallic, and the superconducting transition temperatures are estimated to exceed about 100 K.
We have also found that hydrides of Sb and Bi are possible at high pressures while they are highly unstable under normal conditions. SbH2, SbH3, BiH2, and BiH3 have been shown to be stabilized beyond 150, 150, 100, and 250 GPa, respectively. The phases are metallic with quite dispersive electronic structures, and the superconducting transition temperatures lie in the range from 40 to 70 K.
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| Free Research Field |
物性理論
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