| Project/Area Number |
16K17746
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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 | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 強相関電子系 / 高温超伝導 / 量子スピン液体 / 厳密対角化法 / 変分モンテカルロ法 / 強相関量子系 / トポロジカル物質 / 量子輸送現象 / 強相関系 / 大規模数値計算 |
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| Outline of Final Research Achievements |
We have developed numerical methods that can accurately treat the strongly correlated electron systems. By using the developed methods, we analyzed the superconductivity at the interfaces of the cuprates. As a result, we find that the amplitudes of the superconductivity are pinned at the optimal value in the bulk system. We also show that this mechanism is universal and does not depend on details of models. This results indicates that the interfaces is an ideal to stabilize and optimize the superconductivity without fine tuning of the carrier densities. We also release the open-source software packages mVMC and HΦ, which implement the developed numerical methods.
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| Academic Significance and Societal Importance of the Research Achievements |
高温超伝導などの興味深い現象の舞台となっている強相関電子系を高精度に取り扱える汎用的な数値計算手法の開発を行った。開発した計算手法を用いて、銅酸化物界面での高特性高温超伝導の発現機構、量子スピン液体の有限温度物性などの解析を行った。これらの研究成果は今後の新高温超伝導体・新量子スピン液体の開発につながると期待できる。また、開発した計算手法をオープンソースソフトウェアとして公開を行い、ソフトウェアに関する講習会を開催することで、計算手法の普及活動を行った。
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