Magnetism and superconductivity induced by holes introduced to Mott insulator
| Project/Area Number |
26400411
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Toyota Technological Institute |
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Principal Investigator |
Takano Ken'ichi 豊田工業大学, 工学(系)研究科(研究院), 教授 (00197112)
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| Co-Investigator(Kenkyū-buntansha) |
佐野 和博 三重大学, 工学研究科, 教授 (40201537)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2015: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | モット絶縁体 / ホールとスピンの束縛状態 / t-Jモデル / ホール・スピン束縛状態 / t-J模型 / 長岡強磁性 / ホールの運動 / 強相関 / 量子リング |
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| Outline of Final Research Achievements |
We investigated the motion of holes which are introduced in Mott insulator by doping. Such a hole moves in the surrounding electrons, strongly interacting with the electronic spins. By numerical analysis, we confirmed that one hole and spins form a bound state which behaves as a composite particle with spin S=1, 2, 3, ... . The spin magnitude of a composite particle depends on the values of parameters in the Hamiltonian. Two S=1 composite particles exist almost independently. Two composite particles with S more than 1 aggregate to a single ferromagnetic area. We further constructed the phase diagram for finite hole density by numerical calculation.
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Report
(4 results)
Research Products
(6 results)
