Theoretical Study on Diversity of Mechnism of Supercondcutivity in Strongly Correlated Electron Systems
| Project/Area Number |
25400369
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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 |
Condensed matter physics II
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| Research Institution | Toyota Physical and Chemical Research Institute |
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Principal Investigator |
Miyake Kazumasa 公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (90109265)
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| Co-Investigator(Kenkyū-buntansha) |
鶴田 篤史 大阪大学, 基礎工学研究科, 助教 (40397716)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 量子臨界価数転移 / 原子価スキッピング / 電荷移動ゆらぎ超伝導機構 / スピンゆらぎ超伝導機構 / 重い電子系 / スピン３重項超伝導 / カイラル超伝導 / ２チャンネルアンダーソン格子モデル / 価数転移臨界現象 / バレンススキッピング / 価数移動超伝導機構 / 電気４極子ゆらぎ超伝導機構 / 電荷移動超伝導機構 / 価数転移 / 銅酸化物高温超伝導体 / Sr_2RuO_4 / 電荷近藤効果 |
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| Outline of Final Research Achievements |
The physics of quantum critical valence transition, closely related with the mechanism of superconductivity around there, offers the origin of unconventional quantum criticality which is rather ubiquitously observed in a series of compounds including Yb-based quasicrystal system. We succeeded in constructing the theory that explains these anomalous properties in a coherent way.
The unconventional non-Fermi liquid properties observed in a series of Pr-1-2-20 systems was explained in a coherent way on the basis of the two-channel periodic Anderson model which takes into account the quadrupole degrees of freedom of Pr+3 ion.
In Equal-Spin-Pairing superconducting state, the spin polarization was shown to be induced spontaneously if the energy dependence of the density of states near the Fermi level is taken into account properly.
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Report
(5 results)
Research Products
(86 results)
