Construction of a unified theory for magnetism and superconductivity in strongly correlated electron systems
| Project/Area Number |
26800172
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
Otsuki Junya 東北大学, 理学研究科, 助教 (60513877)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 強相関電子系 / 磁性 / 超伝導 / 動的平均場理論 / 重い電子 / 量子多体論 / データ科学 / スパースモデリング / 動的平均場法 / 解析接続 / 量子モンテカルロ法 / 準結晶 |
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| Outline of Final Research Achievements |
We established a theory that treats magnetism and superconductivity on equal footing. Starting from the dynamical mean-field theory, which has been widely applied to investigation of magnetism, spatial correlations are incorporated to address superconductivity. Applying the theory to the fundamental model for heavy-fermion systems, we revealed that there emerges a peculiar superconducting state that has not been expected in ordinary theories for superconductivity. This result affords a new insights into superconductivity that an exotic pairing could be induced by local-correlation effect.
In the latter of the period, we developed a new data-science approach to quantum many-body calculations. This approach is expected to play an crucial role in future applications of the "unified theory for magnetism and superconductivity" to realistic models for strongly correlated electron materials.
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Report
(5 results)
Research Products
(49 results)
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[Presentation] 多体効果の最前線2016
Author(s)
大槻純也
Organizer
J-Physics 若手夏の学校
Place of Presentation
高野山大学（和歌山県伊都郡）
Year and Date
2016-08-08
Related Report
Invited
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