2002 Fiscal Year Final Research Report Summary
Search for superconductivity in light alkaline metals
| Project/Area Number |
13640364
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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, Lecturer, 基礎工学研究科, 講師 (70283736)
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| Co-Investigator(Kenkyū-buntansha) |
HAMAYA Nozomu Graduate School of Humanities and Sciences, Ochanomizu University, Professor, 大学院・人間文化研究科, 教授 (70156420)
KOBAYASHI Tatsuo Research Center for Materials Science at Extreme Conditions, Associate Professor, 極限科学研究センター, 助教授 (80205468)
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| Project Period (FY) |
2001 – 2002
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| Keywords | Lithium / Metal-Insulator transition / Superconductivity |
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| Research Abstract |
Superconductivity in low-Z elements are expected to occur at high-temperatures because of their high Debye-temperatures according to conventional BCS theory. Hydrogen, the lightest element is predicted the highest superconducting transition of near ambient temperature under its possible metallic state at very high-pressure above 400 Gpa which is experimentally difficult region to reach. Among the all elements Li is the lightest metal and several ptedictions for the existence of superconductivity, however experimentally no superconductivity is observed at atmospheric pressure. Here we report the superconductivity in compressed Li under ptessure above 30 Gpa. The superconducting transition temperature steadily rose up and reached 20 K at 48 Gpa which is the highest value for elements. The present results encourage remarkable expectrations about the high-Tc superconductivity for low-Z elements, especially for metallic hydrogen.
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