2014 Fiscal Year Final Research Report
Many-Body Theory for Excited States in First-Principles Systems and Materials Design for High-Tc Superconductors
| Project Area | Materials Design through Computics: Complex Correlation and Non-equilibrium Dynamics |
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| Project/Area Number |
22104011
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SHIRAI Koun 大阪大学, 産業科学研究所, 准教授 (60178647)
MAEZONO Ryo 北陸先端科学技術大学院大学, 情報科学研究科, 准教授 (40354146)
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| Co-Investigator(Renkei-kenkyūsha) |
SAITO Susumu 東京工業大学, 理工学研究科, 教授 (00262254)
HARUYAMA Junji 青山学院大学, 理工学部, 准教授 (70296383)
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| Research Collaborator |
MAEBASHI Hideaki 東京大学, 物性研究所, 特任研究員 (30361661)
YOSHIZAWA Kanako 東京大学, 物性研究所, 特任研究員 (70439339)
SAKURAI Masahiro 東京大学, 物性研究所, 特任研究員
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Keywords | 物性理論 / 計算物理 / 超伝導材料・素子 / 強相関電子系 / 金属物性 / 第一原理計算 / 超伝導 / 転移温度 |
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| Outline of Final Research Achievements |
By employing the Green's-function method and diffusion Monte Carlo simulations, we have studied quantum many-body problems in condensed matter physics, based primarily on the first-principles Hamiltonian from a perspective of pursuing new concepts, new phenomena, and new methodologies in the density functional theory rather than investigating materials properties. Special attention is paid to the system of a single proton embedded in the electron gas to reveal that a Kondo spin-singlet resonance state emerges in the intermediate densities with the Kondo temperature well beyond 1,000K, indicating that a room temperature superconductor might be obtained, if protons are introduced into a metal with an appropriate density in a regular array to form a Kondo lattice system. We also find a possibility of the universal transition into a phase with a very small effective mass at very low densities.
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| Free Research Field |
数物系科学
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