2018 Fiscal Year Final Research Report
Clarification of the correlation between functionality and chemical pressure in BiCh2-based compounds
| Project/Area Number |
16H04493
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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 |
Physical properties of metals/Metal-base materials
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
三浦 章 北海道大学, 工学研究院, 助教 (10603201)
寺嶋 健成 岡山大学, 異分野基礎科学研究所, 特別契約職員(講師) (20551518)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 層状化合物 / BiCh2系層状化合物 / 超伝導 / 熱電変換 / 化学圧力 / 結晶構造解析 / 新超伝導体 / 非従来型超伝導機構 |
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| Outline of Final Research Achievements |
We have investigated chemical pressure effects on local structure, superconducting properties, and thermoelectric properties of BiCh2-based layered compounds. According to the obtained concept for BiCh2-based material design, new superconductors, (Eu,RE)FBi(S,Se)2, (La,Ce)OBiSSe, and (Ce,Pr)OBiS2, were discovered. Furthermore, La2O2Bi3AgS6 with a four-layer-type superconducting layer was discovered. From isotope effect, we found that BiCh2-based superconductors can be categorized into unconventional superconductors. We have also developed related layered compounds with InS2-type and SbSe2-type conducting layers.
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| Free Research Field |
新物質、超伝導、熱電材料
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は2012年に研究代表者らが発見した層状超伝導体の発現機構解明および物性制御手法確立を目指した研究である．日本で発見された新機能性材料をさらに発展させるために，局所構造に着目した研究を展開した．得られた知見は今後の新層状機能性材料開発に有意義なものであると考えている．
また，本研究で得られた非従来型超伝導機構の可能性は，超伝導基礎研究の分野に新たな研究対象を提供することにつながるため，学術的意義も高いと考えている．
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