| Project/Area Number |
18K13490
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
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| Research Institution | Saitama University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 強相関電子系 / 多軌道系 / 自発的対称性の破れ / 非従来型電子秩序 / 軌道秩序 / 超伝導 / フラーレン / 近藤格子 / 重い電子系 / 電子秩序 / 動的平均場理論 |
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| Outline of Final Research Achievements |
In the presence of the Coulomb repulsive interaction, the electrons in solids are highly entangled quantum-mechanically. As a result, the many-body electronic correlation causes a variety of collective phenomena such as electronic ordering where the symmetry of the system is spontaneously broken. Here, we have studied an unconventional electronic ordering, where the usual concept for the ordering cannot simply be applied. We have considered a material-specific conditions of the strongly correlated electron systems, and have clarified characteristic behaviors of the unconventional orbital ordering and pairing states in p-, d-, f-electron systems, including molecular-based conductors, transition-metal materials, and heavy-electrons systems.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で対象とするのは固体中の電子が協力現象によって引き起こす秩序化（自発的対称性の破れ）である。我々の暮らす社会では、電子秩序の例である磁性体や超伝導体などの物質が様々に応用され、豊かな暮らしの基盤となっている。一方で、電子相関効果が顕著になる系では、通常の概念では理解できない非従来型電子秩序が存在する。我々はこの特異な秩序現象に注目し、その物性を理論的に研究した。このような知見は、通常の電子の秩序化とは異なるものであり、新しい電子物性・機能の開拓につながることが期待できる。
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